算清每一笔账。
计算器
计算金钱、健康和时间相关的各种数字——无需把数据交给任何人。
133 个工具可用
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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自雇税估算 (Schedule SE)
估算 1099 收入对应的社保与医保。
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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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加密永续合约资金费率计算器
估算杠杆加密仓位的累计资金费用。
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质押奖励税额计算器
估算每年质押/借贷奖励的应纳税额。
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比特币 4% 法则
估算需要多少 BTC 才能让地板增长覆盖支出。
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比特币网络费用估算器
查看比特币交易的 sat/vB 和美元成本。
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加密 1099-DA 成本基础验证
用真实成本基础核对 1099-DA。
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加密成本基础回收
估算需要回收多少基础以平衡 8949。
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押金返还计算器
估算房东可扣除金额与可退回金额。
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租赁 vs 购买(含残值)
决定租赁或全款购车。
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汽车贷款隐藏费用检测
比对月供与广告 APR 的数学逻辑。
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比特币矿池比较
按算力比较矿池费用与收益。
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SaaS 僵尸席位检测
识别闲置 SaaS 席位与月度成本。
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云存储 TCO
估算 S3 / Wasabi / B2 月度与年度成本。
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子女抚养费指南估算
估算每月子女抚养费。
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长期护理保险 vs 自付
判断是否应购买长期护理保险。
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最后一公里配送成本
估算小型电商每包裹的最后一公里成本。
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按收入可负担房价
按月毛收入估算可负担的房价。
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ESPP 含回溯价值
估算含回溯条款的 ESPP 价值与税额。
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Wi-Fi 升级 ROI
评估升级到 Wi-Fi 6E/7 是否值得。
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LLM API 月度成本
估算月度 LLM 推理成本。
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股票授予稀释与价值
计算股票授予的归属价值与差额。
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优惠评分 vs 历史最低
按历史最低价为当前价打分。
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阅读时长估算
估算书或 PDF 的阅读时长。
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小型仓库建造成本
估算小型仓库 / 3PL 的设备 capex 与月度 opex。
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本地 AI 推理成本
评估在 GPU 上本地运行 LLM 是否比 API 更便宜。
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GPU 云实例成本
比较按需、竞价、预留 GPU 实例成本。
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