Crunch the numbers.
Calculators
Crunch the numbers you need for money, health, and time — without giving your data to anyone.
199 tools available
Rent Affordability Calculator
Find out how much rent you can afford based on your income.
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Shopify Shipping Simulator
Estimate shipping cost and margin on a Shopify order.
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Appliance Energy Cost Calculator
Calculate how much an appliance costs you per month and per year.
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Daily Distraction Cost Calculator
See how much time and money distractions cost you every year.
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Tip Calculator
Split the bill fairly and pick the right tip percentage.
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Compound Interest Calculator
Visualize how your investments grow over time with compound interest.
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Mortgage Payment Calculator
Estimate your monthly mortgage payment including taxes and insurance.
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Savings Goal Calculator
Find out how much to save each month to hit any goal.
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Discount / Sale Price Calculator
Calculate the final price, savings, and effective percentage off.
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Meeting Cost Calculator
See how much every minute of a meeting actually costs.
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Age Calculator
Calculate exact age in years, months, days, hours, and minutes.
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Days Between Dates
Calculate the exact gap between two dates in days, weeks, and months.
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Reading Time Estimator
Estimate how long it takes to read any text aloud or silently.
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Aspect Ratio Calculator
Calculate scaled dimensions for any aspect ratio.
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Etsy Fee Calculator
See exactly what Etsy takes from each sale.
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Profit Margin Calculator
Calculate gross and net profit margins on any product.
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Trip ETA Calculator
Calculate arrival time for a trip by distance and speed.
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Debt Payoff Calculator (Snowball vs Avalanche)
Compare the debt snowball and avalanche strategies and see which saves you more.
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Car Payment Calculator
Estimate your monthly car payment, total interest, and total cost of an auto loan.
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Mortgage Refinance Break-Even Calculator
Find out how long it takes to break even on a refinance — and whether it’s worth it.
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Startup Burn Rate & Runway Calculator
See how fast you’re burning cash and how many months of runway you have left.
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Instagram / TikTok Engagement Rate
Calculate your true engagement rate and see how you compare to your niche.
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50/30/20 Budget Calculator
Build a balanced monthly budget in one screen using the 50/30/20 rule.
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Loan Amortization Schedule
See exactly how much of each payment goes to interest vs principal over the life of any loan.
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Retirement 401(k) / IRA Calculator
Project your retirement balance and see if you’re on track.
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Crypto Dollar-Cost Averaging Calculator
See the future value of a recurring BTC/ETH buy and its average entry price.
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SIP / Mutual Fund Return Calculator
Project the future value of a monthly SIP / mutual fund investment.
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Breakeven Analysis (Small Business)
Find the exact sales volume you need to cover all your costs and turn a profit.
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Real Estate ROI & Cap Rate
Compute cap rate, cash-on-cash return, and total ROI on a rental property.
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Freelancer Day Rate Calculator
Find the hourly or day rate you need to hit your target salary as a freelancer.
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Inflation Calculator
See how much purchasing power $X in year Y is worth in today’s dollars.
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Time Card / Hours Calculator
Add clock-in / clock-out times and get total hours, overtime, and pay.
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Tax Withholding Estimator (2026)
Estimate your U.S. federal tax, FICA, and net paycheck from a W-2 salary.
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Group Cost Splitter
Split a trip, dinner, or shared cost evenly — or with custom shares, deposits, and tips.
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Mortgage Discount Points Calculator
Decide whether to buy down your mortgage rate with discount points.
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Blood Alcohol Estimator (Widmark)
Estimate your BAC over time using the Widmark formula — strictly educational.
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ISO Week Number Calculator
Get the ISO 8601 week number, weekday, and day-of-year for any date.
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Roth vs Traditional 401(k) Comparison
See whether a Roth or Traditional 401(k) leaves more money in your pocket at retirement.
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Sun & Golden Hour Calculator
Get sunrise, sunset, golden hour and blue hour times for any date and location.
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ND Filter Long-Exposure Calculator
Find the right ND filter and exposure time for any daylight long exposure.
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Depth of Field Calculator
Compute near, far, and total depth of field for any lens and aperture.
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Exposure Value (EV) Calculator
Compute and convert EV at any aperture, shutter, and ISO combination.
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Self-Employment Tax Calculator
Estimate IRS SE tax (15.3%), Social Security cap, and the deductible half.
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Quarterly Estimated Tax Calculator
Compute your quarterly 1040-ES payment to avoid an IRS underpayment penalty.
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Speedometer Error & Tire Size Calculator
See how your real speed and odometer change when you change tire size.
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EV vs Gas Car Savings Calculator
Compare total 5-year cost of an EV vs the gas equivalent — fuel, maintenance, depreciation.
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Lease vs Buy Car Calculator
See whether leasing or buying is cheaper over the period you actually keep the car.
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Meat Cook Time by Weight
Estimate cook time and target internal temperature for any cut and method.
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ROAS & Marketing ROI Calculator
Compute Return on Ad Spend, CAC, break-even, and target CPA from your numbers.
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Stripe / PayPal / Square Fee Calculator
See the real fee on every payment processor — Stripe, PayPal, Square, and more.
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Wedding Alcohol / Drink Calculator
Estimate the right number of bottles, beer cases, and mixers for a party.
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Net Worth Snapshot Calculator
Tally assets and liabilities to compute a private net-worth snapshot.
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Emergency Fund Calculator
See how big your emergency fund should be and how long to build it.
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Seed & Plant Spacing Calculator
See how many plants fit a bed and how far apart to space them.
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Baker's Percentage Calculator
Convert any bread recipe to baker's percentages or scale to a target dough weight.
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Sourdough Hydration Calculator
Find the dough hydration percentage from flour and water weights.
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Meat Internal Temperature Guide
Pull temperatures and carryover cook times for beef, pork, poultry, and fish.
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Pan Size Converter
Adjust batter volume and bake time when swapping pan sizes.
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Oven Temperature Converter
Convert between °F, °C, Gas Mark, and convection with fan offset.
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ABV Calculator (Homebrew)
Compute alcohol by volume from gravity readings (OG / FG).
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Mash Water & Strike Temp Calculator
Strike temperature and total water volume from grain bill + mash thickness.
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Hop Utilization / IBU Calculator
Estimate IBU from hop weight, AA%, boil time, and wort gravity (Tinseth).
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Yeast Starter Calculator
Starter size and stir-plate recommendation from target OG and volume.
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Priming Sugar Calculator
How much corn sugar / DME to carbonate your bottled beer.
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Brewing Water Chemistry Calculator
Adjust mash water with salts to hit a target water profile.
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Tire Size Comparison
Compare two tire specs by diameter, width, and speedometer error.
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Fuel Cost per Mile
Cost per mile or kilometer from MPG and fuel price.
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Engine Oil Capacity Calculator
How many quarts / liters of oil your engine needs.
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Windshield Washer Fluid Dilution
Methanol ratio for any freeze point at any volume.
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Ceramic Coating Coverage Calculator
Milliliters per panel for a full-car ceramic coating.
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Yarn Yardage Estimator
Estimate total yardage for a blanket, scarf, sweater, or amigurumi.
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Gauge Swatch Converter
Rescale a pattern when your swatch does not match.
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Depth of Field Calculator
Near / far focus limits and total DOF for any lens + aperture combo.
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Exposure Triangle Calculator
Equivalent exposures when swapping aperture, shutter, or ISO.
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Golden Hour / Blue Hour Calculator
Sunrise, sunset, golden hour, and blue hour times for any date and location.
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Print Size & DPI Calculator
Maximum print size from sensor megapixels at a target DPI.
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Screenplay Runtime Estimator
Estimate feature runtime from page count and dialogue density.
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Book Royalty Calculator
Earnings from advance, royalty rate, and projected sales.
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Wedding Budget Split
Allocate your total budget across venue, catering, photography, and more.
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Wedding Cake Serving Calculator
Servings per tier and total servings needed for your guest count.
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Seating Chart Capacity Calculator
How many guests fit at round, rectangular, or farmhouse tables.
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Backpack Weight Calculator
Total pack weight and percent of body weight carried.
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Hike Water Needs Calculator
Liters of water for any distance, elevation, temperature, and pack weight.
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Elevation Pace Adjustment Calculator
Adjust your flat-pace estimate for elevation gain and loss.
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Baby Age Calculator
Months, weeks, and days old from birth date, with adjusted age for preemies.
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Baby Formula Amount Calculator
Daily ounces from age/weight plus per-feed bottle size.
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Child Growth Percentile Calculator
Height, weight, and BMI percentile from CDC or WHO charts.
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Salary-to-Hourly Calculator
Convert annual salary to true hourly rate after PTO, commute, and benefits.
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Debt Avalanche vs Snowball Calculator
Side-by-side payoff month and total interest for both methods.
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US Tax Bracket Calculator (2024)
Marginal and effective tax rate plus take-home pay.
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Savings Rate Calculator
What percent of your income are you actually saving.
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Days Together / Anniversary Counter
Exact years, months, days since your anniversary — and milestone badges.
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Language Hours to Fluency
FSI hours from zero to A2 / B1 / B2 / C1 / C2 for any language.
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Anki Retention Calculator
Project your long-term recall rate and review load.
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Resume Bullet Word Counter & Strength Score
Count words, flag weak verbs, and suggest stronger action-verb rewrites.
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Salary Negotiation Anchor Calculator
Set your walk-away, target, and anchor numbers before the offer call.
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Tax Withholding Estimator
See how much federal tax to withhold per paycheck to get a refund (or owe $0).
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Roth IRA MAGI Phase-out
Compute your MAGI and see how much Roth IRA contribution you're allowed.
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Cost-of-Living Compare
Estimate the equivalent salary and rent burden in any US metro.
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CD vs HYSA
Is a CD worth locking up your cash for the small APY bump?
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Family Sale Gift Tax Estimator
Estimate the gift-tax exposure on a below-market sale from family.
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529-to-Roth Rollover Optimizer
See how much of your 529 can move into a Roth — and the tax traps.
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Lease Buyout Calculator
Decide whether to buy out your lease, surrender it, or sell privately.
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Credit Score Converter
Translate between VantageScore, FICO 8, FICO Auto, and FICO Mortgage.
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401(k) / 403(b) Fee Drag
See how much a maintenance fee is costing your retirement over time.
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Raise vs Inflation
Does your annual raise actually beat inflation?
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CD Ladder Yield
Build a CD ladder and see the realised yield across rungs.
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Real Return After Tax & Inflation
See what your '7% return' actually becomes after tax, fees, and inflation.
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Crypto Perpetual Funding Fee
Estimate the cumulative funding fees on a leveraged crypto position.
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Staking Rewards Tax Estimator
Estimate the tax owed on annual crypto staking / lending / restaking income.
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Bitcoin 4% Rule
Estimate how much BTC you need for annual expenses to be covered by floor growth.
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Bitcoin Network Fee Estimator
See the sat/vB and USD cost of a Bitcoin transaction before you broadcast.
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Crypto 1099-DA Basis Validator
Reconcile your crypto cost basis against the new 1099-DA before filing.
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Cost Basis Recovery Estimator
Estimate how much basis you need to recover to keep your 8949 in balance.
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Security Deposit Return Estimator
Estimate how much of a security deposit a landlord can deduct and what you get back.
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Lease vs Buy (with Residual)
Decide whether to lease a car with a residual or buy it outright.
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Auto Loan Hidden-Fee Detector
Compare the quoted monthly payment to the math for the advertised APR.
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Bitcoin Mining Pool Comparator
See expected daily BTC, pool fees, and electricity overhead for your hashrate.
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SaaS Zombie-Seat Detector
Identify unused SaaS seats and the monthly cost of leaving them active.
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Cloud Storage TCO
Estimate the monthly and annual cost of S3 / Wasabi / B2 cloud storage.
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Child Support Guideline Estimator
Estimate monthly child support based on combined income and custody split.
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Long-Term Care Insurance vs Self-Insure
See whether to buy LTC insurance or self-insure by region and care type.
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Last-Mile Delivery Cost
Estimate the per-package last-mile delivery cost for a small e-commerce store.
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Home Affordability from Income
Estimate the home price you can afford from gross monthly income.
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ESPP with Lookback Value
Estimate the value and tax of an ESPP offering with the lookback provision.
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Wi-Fi Upgrade ROI
See whether a Wi-Fi 6E / 7 upgrade pays off in productivity.
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LLM API Monthly Cost
Estimate the cost of running LLM inference at a given monthly volume.
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Equity Grant Dilution & Value
Compute the vested value and spread of an RSU / option grant.
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Deal Score vs All-Time Low
Score a current sale price against all-time low / 6-month low.
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Reading Time Estimator
Estimate reading time for a book or PDF at your wpm.
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Small Warehouse Build Cost
Estimate the buildout capex and monthly opex for a small warehouse / 3PL.
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Local AI Inference Cost
See if running an LLM locally on a GPU is cheaper than a hosted API.
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GPU Cloud Instance Cost
Compare on-demand, spot, and reserved GPU instance costs across providers.
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Home Sale Net Proceeds Calculator
See what you actually keep after closing costs, agent fees, payoff, and capital gains.
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Social Security Break-Even Calculator
Compare claiming Social Security at 62, FRA, and 70 with a break-even age.
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Pension Lump Sum vs Monthly Calculator
Compare a pension lump-sum offer against the monthly annuity stream.
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HSA vs FSA Calculator
Compare an HSA against a health FSA using tax savings, rollover, and contribution limits.
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Dependent Care FSA Calculator
See the tax savings and contribution limit for a dependent care FSA.
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Mega Backdoor Roth Calculator
Estimate how much after-tax 401(k) money you can convert to Roth each year.
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401(k) Match Calculator
Calculate the exact 401(k) contribution needed to collect the full employer match.
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Car Insurance Payment Calculator
Compare monthly and annual car insurance payment plans side by side.
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Solar Lease vs Buy Calculator
Compare solar lease, PPA, loan, and cash ownership over the system life.
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Pet Insurance Break-Even Calculator
Estimate whether pet insurance pays off from premiums, deductible, and expected vet bills.
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Dog Daycare Cost Calculator
Estimate daily, weekly, or monthly dog daycare and boarding costs.
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Dog Ownership Cost Calculator
Budget first-year and lifetime dog costs from adoption to food, vet, and care.
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Health Plan Out-of-Pocket Calculator
Compare health plans by premium, deductible, copay, and out-of-pocket maximum.
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Streaming Bundle Savings Calculator
See whether a cable or streaming bundle beats your current subscription stack.
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Grocery Unit Price Calculator
Compare grocery sizes and brands by price per unit.
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Coffee Cost per Cup Calculator
Compare coffee shop, pod, and home-brewed coffee cost per cup.
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Pizza Dough Calculator
Scale pizza dough by ball weight, hydration, and number of pizzas.
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Term Life Insurance Cost Calculator
Estimate term life premiums from coverage, term, age, and health class.
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Home Insurance Coverage Calculator
Estimate dwelling replacement cost and coverage limits from home details.
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Umbrella Insurance Cost Calculator
Estimate umbrella insurance premiums from coverage and household risk.
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Mortgage Payoff vs Invest Calculator
Compare paying off a mortgage early against investing the same money.
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Student Loan Refinance Break-Even Calculator
Compare refinancing student loans against current payments and fees.
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Car Loan Early Payoff Calculator
See how much paying off a car loan early saves in interest.
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Biweekly Mortgage Savings Calculator
Compare biweekly mortgage payments against monthly payments.
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529 vs Taxable Account Calculator
Compare a 529 plan against a taxable brokerage for education savings.
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Medicare IRMAA Surcharge Calculator
Estimate Medicare Part B and Part D IRMAA surcharges from income.
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Social Security Tax Calculator
Estimate how much of your Social Security benefit is taxable.
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Capital Gains Tax Calculator
Estimate long-term and short-term capital gains tax from income and gains.
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Property Tax Estimator
Estimate annual property taxes from assessed value, exemptions, and mill rate.
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Wedding Cost Estimator
Estimate a wedding budget from guests, venue, catering, and region.
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Funeral Cost Estimator
Estimate funeral, burial, or cremation costs from service and location.
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Grocery Delivery vs Store Calculator
Compare grocery delivery, pickup, and in-store shopping costs.
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Amazon FBA Fee Calculator
Estimate Amazon FBA referral, fulfillment, and storage fees.
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eBay Fee Calculator
Estimate eBay final value fees, insertion fees, and seller costs.
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Patreon Fee Calculator
Estimate Patreon platform fees and creator payouts from pledges.
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Twitch Payout Calculator
Estimate Twitch earnings from subs, bits, ads, and donations.
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Meal Kit vs Grocery Cost Calculator
Compare meal kit deliveries against buying the same groceries.
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PMI Removal Break-Even Calculator
Estimate when private mortgage insurance can be removed.
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Mortgage Points Break-Even Calculator
Compare paying discount points against keeping cash at closing.
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HELOC vs Home Equity Loan Calculator
Compare a variable HELOC against a fixed home-equity loan.
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15 vs 30 Year Mortgage Calculator
Compare payment, interest, equity, and invest-the-difference outcomes.
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401(k) Loan Cost Calculator
Compare borrowing from a 401(k) against a conventional loan.
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IRA Early Withdrawal Penalty Calculator
Estimate taxable income, penalty, exceptions, and net cash from an IRA withdrawal.
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Disability Insurance Cost Calculator
Estimate individual disability premium range and coverage gap.
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COBRA Cost Calculator
Estimate COBRA premium, subsidy, and marketplace comparison.
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Vision Insurance Break-Even Calculator
Compare vision plan premiums with expected exams, lenses, frames, and contacts.
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Renters Insurance Coverage Cost Calculator
Estimate coverage need and illustrative renters insurance premium.
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Flood Insurance Cost & Coverage Calculator
Estimate flood policy factors, deductible, and coverage gaps.
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Cell Phone Insurance Break-Even Calculator
Compare phone protection premiums, deductibles, and self-insuring.
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Dishwasher Running Cost Calculator
Estimate dishwasher energy and water cost per load and per year.
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Refrigerator Running Cost Calculator
Estimate refrigerator energy cost from kWh and electricity rate.
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Christmas Lights Electric Cost Calculator
Estimate Christmas lights energy use from type, count, and hours.
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Topsoil Calculator
Calculate topsoil volume and cost from area and depth.
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Wood Stain Coverage Calculator
Calculate wood stain coverage from area, coats, and surface.
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Mesh WiFi Worth Calculator
Compare mesh WiFi against a router upgrade or ethernet.
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E-Bike Range Calculator
Estimate e-bike range from battery, assist, rider, and terrain.
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Airbnb Cleaning Fee Calculator
Estimate a cleaning fee from listing size and turnover.
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Mortgage Rate Lock Cost Calculator
Estimate mortgage rate lock fees and break-even.
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Rent Increase Calculator
Calculate rent increase options against market and vacancy risk.
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Small Business Tax Calculator
Estimate quarterly and annual tax for a small business.
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Business Valuation Calculator
Estimate what a small business is worth by multiple.
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Service Pricing Calculator
Set a day rate or project price from income and overhead.
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Business Runway Calculator
Estimate how many months of business runway you have left.
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Self-Employed Deduction Calculator
Total mileage, home office, and self-employment deductions.
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Home Inspection Cost Calculator
Estimate home inspection cost from size and inspection type.
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Video Production Cost Calculator
Estimate video production from crew, gear, and post.
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