Haz los números.

Calculadoras

Calcula lo que necesitas sobre dinero, salud y tiempo — sin entregar tus datos a nadie.

133 herramientas disponibles

Rent Affordability Calculator

Find out how much rent you can afford based on your income.

Abrir herramienta

Shopify Shipping Simulator

Estimate shipping cost and margin on a Shopify order.

Abrir herramienta

Appliance Energy Cost Calculator

Calculate how much an appliance costs you per month and per year.

Abrir herramienta

Daily Distraction Cost Calculator

See how much time and money distractions cost you every year.

Abrir herramienta

Tip Calculator

Split the bill fairly and pick the right tip percentage.

Abrir herramienta

Compound Interest Calculator

Visualize how your investments grow over time with compound interest.

Abrir herramienta

Mortgage Payment Calculator

Estimate your monthly mortgage payment including taxes and insurance.

Abrir herramienta

Savings Goal Calculator

Find out how much to save each month to hit any goal.

Abrir herramienta

Discount / Sale Price Calculator

Calculate the final price, savings, and effective percentage off.

Abrir herramienta

Meeting Cost Calculator

See how much every minute of a meeting actually costs.

Abrir herramienta

Age Calculator

Calculate exact age in years, months, days, hours, and minutes.

Abrir herramienta

Days Between Dates

Calculate the exact gap between two dates in days, weeks, and months.

Abrir herramienta

Reading Time Estimator

Estimate how long it takes to read any text aloud or silently.

Abrir herramienta

Aspect Ratio Calculator

Calculate scaled dimensions for any aspect ratio.

Abrir herramienta

Etsy Fee Calculator

See exactly what Etsy takes from each sale.

Abrir herramienta

Profit Margin Calculator

Calculate gross and net profit margins on any product.

Abrir herramienta

Trip ETA Calculator

Calculate arrival time for a trip by distance and speed.

Abrir herramienta

Debt Payoff Calculator (Snowball vs Avalanche)

Compare the debt snowball and avalanche strategies and see which saves you more.

Abrir herramienta

Car Payment Calculator

Estimate your monthly car payment, total interest, and total cost of an auto loan.

Abrir herramienta

Mortgage Refinance Break-Even Calculator

Find out how long it takes to break even on a refinance — and whether it’s worth it.

Abrir herramienta

Startup Burn Rate & Runway Calculator

See how fast you’re burning cash and how many months of runway you have left.

Abrir herramienta

Instagram / TikTok Engagement Rate

Calculate your true engagement rate and see how you compare to your niche.

Abrir herramienta

50/30/20 Budget Calculator

Build a balanced monthly budget in one screen using the 50/30/20 rule.

Abrir herramienta

Loan Amortization Schedule

See exactly how much of each payment goes to interest vs principal over the life of any loan.

Abrir herramienta

Retirement 401(k) / IRA Calculator

Project your retirement balance and see if you’re on track.

Abrir herramienta

Crypto Dollar-Cost Averaging Calculator

See the future value of a recurring BTC/ETH buy and its average entry price.

Abrir herramienta

SIP / Mutual Fund Return Calculator

Project the future value of a monthly SIP / mutual fund investment.

Abrir herramienta

Breakeven Analysis (Small Business)

Find the exact sales volume you need to cover all your costs and turn a profit.

Abrir herramienta

Real Estate ROI & Cap Rate

Compute cap rate, cash-on-cash return, and total ROI on a rental property.

Abrir herramienta

Freelancer Day Rate Calculator

Find the hourly or day rate you need to hit your target salary as a freelancer.

Abrir herramienta

Inflation Calculator

See how much purchasing power $X in year Y is worth in today’s dollars.

Abrir herramienta

Time Card / Hours Calculator

Add clock-in / clock-out times and get total hours, overtime, and pay.

Abrir herramienta

Tax Withholding Estimator (2026)

Estimate your U.S. federal tax, FICA, and net paycheck from a W-2 salary.

Abrir herramienta

Group Cost Splitter

Split a trip, dinner, or shared cost evenly — or with custom shares, deposits, and tips.

Abrir herramienta

Mortgage Discount Points Calculator

Decide whether to buy down your mortgage rate with discount points.

Abrir herramienta

Blood Alcohol Estimator (Widmark)

Estimate your BAC over time using the Widmark formula — strictly educational.

Abrir herramienta

ISO Week Number Calculator

Get the ISO 8601 week number, weekday, and day-of-year for any date.

Abrir herramienta

Roth vs Traditional 401(k) Comparison

See whether a Roth or Traditional 401(k) leaves more money in your pocket at retirement.

Abrir herramienta

Sun & Golden Hour Calculator

Get sunrise, sunset, golden hour and blue hour times for any date and location.

Abrir herramienta

ND Filter Long-Exposure Calculator

Find the right ND filter and exposure time for any daylight long exposure.

Abrir herramienta

Depth of Field Calculator

Compute near, far, and total depth of field for any lens and aperture.

Abrir herramienta

Exposure Value (EV) Calculator

Compute and convert EV at any aperture, shutter, and ISO combination.

Abrir herramienta

Estimador de impuesto sobre trabajo por cuenta propia (Schedule SE)

Estima SS + Medicare sobre ingresos 1099.

Abrir herramienta

Quarterly Estimated Tax Calculator

Compute your quarterly 1040-ES payment to avoid an IRS underpayment penalty.

Abrir herramienta

Speedometer Error & Tire Size Calculator

See how your real speed and odometer change when you change tire size.

Abrir herramienta

EV vs Gas Car Savings Calculator

Compare total 5-year cost of an EV vs the gas equivalent — fuel, maintenance, depreciation.

Abrir herramienta

Lease vs Buy Car Calculator

See whether leasing or buying is cheaper over the period you actually keep the car.

Abrir herramienta

Meat Cook Time by Weight

Estimate cook time and target internal temperature for any cut and method.

Abrir herramienta

ROAS & Marketing ROI Calculator

Compute Return on Ad Spend, CAC, break-even, and target CPA from your numbers.

Abrir herramienta

Stripe / PayPal / Square Fee Calculator

See the real fee on every payment processor — Stripe, PayPal, Square, and more.

Abrir herramienta

Wedding Alcohol / Drink Calculator

Estimate the right number of bottles, beer cases, and mixers for a party.

Abrir herramienta

Net Worth Snapshot Calculator

Tally assets and liabilities to compute a private net-worth snapshot.

Abrir herramienta

Emergency Fund Calculator

See how big your emergency fund should be and how long to build it.

Abrir herramienta

Seed & Plant Spacing Calculator

See how many plants fit a bed and how far apart to space them.

Abrir herramienta

Baker's Percentage Calculator

Convert any bread recipe to baker's percentages or scale to a target dough weight.

Abrir herramienta

Sourdough Hydration Calculator

Find the dough hydration percentage from flour and water weights.

Abrir herramienta

Meat Internal Temperature Guide

Pull temperatures and carryover cook times for beef, pork, poultry, and fish.

Abrir herramienta

Pan Size Converter

Adjust batter volume and bake time when swapping pan sizes.

Abrir herramienta

Oven Temperature Converter

Convert between °F, °C, Gas Mark, and convection with fan offset.

Abrir herramienta

ABV Calculator (Homebrew)

Compute alcohol by volume from gravity readings (OG / FG).

Abrir herramienta

Mash Water & Strike Temp Calculator

Strike temperature and total water volume from grain bill + mash thickness.

Abrir herramienta

Hop Utilization / IBU Calculator

Estimate IBU from hop weight, AA%, boil time, and wort gravity (Tinseth).

Abrir herramienta

Yeast Starter Calculator

Starter size and stir-plate recommendation from target OG and volume.

Abrir herramienta

Priming Sugar Calculator

How much corn sugar / DME to carbonate your bottled beer.

Abrir herramienta

Brewing Water Chemistry Calculator

Adjust mash water with salts to hit a target water profile.

Abrir herramienta

Tire Size Comparison

Compare two tire specs by diameter, width, and speedometer error.

Abrir herramienta

Fuel Cost per Mile

Cost per mile or kilometer from MPG and fuel price.

Abrir herramienta

Engine Oil Capacity Calculator

How many quarts / liters of oil your engine needs.

Abrir herramienta

Windshield Washer Fluid Dilution

Methanol ratio for any freeze point at any volume.

Abrir herramienta

Ceramic Coating Coverage Calculator

Milliliters per panel for a full-car ceramic coating.

Abrir herramienta

Yarn Yardage Estimator

Estimate total yardage for a blanket, scarf, sweater, or amigurumi.

Abrir herramienta

Gauge Swatch Converter

Rescale a pattern when your swatch does not match.

Abrir herramienta

Depth of Field Calculator

Near / far focus limits and total DOF for any lens + aperture combo.

Abrir herramienta

Exposure Triangle Calculator

Equivalent exposures when swapping aperture, shutter, or ISO.

Abrir herramienta

Golden Hour / Blue Hour Calculator

Sunrise, sunset, golden hour, and blue hour times for any date and location.

Abrir herramienta

Print Size & DPI Calculator

Maximum print size from sensor megapixels at a target DPI.

Abrir herramienta

Screenplay Runtime Estimator

Estimate feature runtime from page count and dialogue density.

Abrir herramienta

Book Royalty Calculator

Earnings from advance, royalty rate, and projected sales.

Abrir herramienta

Wedding Budget Split

Allocate your total budget across venue, catering, photography, and more.

Abrir herramienta

Wedding Cake Serving Calculator

Servings per tier and total servings needed for your guest count.

Abrir herramienta

Seating Chart Capacity Calculator

How many guests fit at round, rectangular, or farmhouse tables.

Abrir herramienta

Backpack Weight Calculator

Total pack weight and percent of body weight carried.

Abrir herramienta

Hike Water Needs Calculator

Liters of water for any distance, elevation, temperature, and pack weight.

Abrir herramienta

Elevation Pace Adjustment Calculator

Adjust your flat-pace estimate for elevation gain and loss.

Abrir herramienta

Baby Age Calculator

Months, weeks, and days old from birth date, with adjusted age for preemies.

Abrir herramienta

Baby Formula Amount Calculator

Daily ounces from age/weight plus per-feed bottle size.

Abrir herramienta

Child Growth Percentile Calculator

Height, weight, and BMI percentile from CDC or WHO charts.

Abrir herramienta

Salary-to-Hourly Calculator

Convert annual salary to true hourly rate after PTO, commute, and benefits.

Abrir herramienta

Debt Avalanche vs Snowball Calculator

Side-by-side payoff month and total interest for both methods.

Abrir herramienta

US Tax Bracket Calculator (2024)

Marginal and effective tax rate plus take-home pay.

Abrir herramienta

Savings Rate Calculator

What percent of your income are you actually saving.

Abrir herramienta

Days Together / Anniversary Counter

Exact years, months, days since your anniversary — and milestone badges.

Abrir herramienta

Language Hours to Fluency

FSI hours from zero to A2 / B1 / B2 / C1 / C2 for any language.

Abrir herramienta

Anki Retention Calculator

Project your long-term recall rate and review load.

Abrir herramienta

Resume Bullet Word Counter & Strength Score

Count words, flag weak verbs, and suggest stronger action-verb rewrites.

Abrir herramienta

Salary Negotiation Anchor Calculator

Set your walk-away, target, and anchor numbers before the offer call.

Abrir herramienta

Tax Withholding Estimator

See how much federal tax to withhold per paycheck to get a refund (or owe $0).

Abrir herramienta

Roth IRA MAGI Phase-out

Compute your MAGI and see how much Roth IRA contribution you're allowed.

Abrir herramienta

Cost-of-Living Compare

Estimate the equivalent salary and rent burden in any US metro.

Abrir herramienta

CD vs HYSA

Is a CD worth locking up your cash for the small APY bump?

Abrir herramienta

Family Sale Gift Tax Estimator

Estimate the gift-tax exposure on a below-market sale from family.

Abrir herramienta

529-to-Roth Rollover Optimizer

See how much of your 529 can move into a Roth — and the tax traps.

Abrir herramienta

Lease Buyout Calculator

Decide whether to buy out your lease, surrender it, or sell privately.

Abrir herramienta

Credit Score Converter

Translate between VantageScore, FICO 8, FICO Auto, and FICO Mortgage.

Abrir herramienta

401(k) / 403(b) Fee Drag

See how much a maintenance fee is costing your retirement over time.

Abrir herramienta

Raise vs Inflation

Does your annual raise actually beat inflation?

Abrir herramienta

CD Ladder Yield

Build a CD ladder and see the realised yield across rungs.

Abrir herramienta

Real Return After Tax & Inflation

See what your '7% return' actually becomes after tax, fees, and inflation.

Abrir herramienta

Comisión de financiación de cripto perpetuo

Estima las comisiones de financiación acumuladas en una posición apalancada.

Abrir herramienta

Calculadora de impuestos por staking

Estima los impuestos sobre recompensas anuales de staking/préstamo.

Abrir herramienta

Regla del 4 % de Bitcoin

Estima cuánto BTC necesitas para que el crecimiento del piso cubra tus gastos.

Abrir herramienta

Estimador de comisión de red Bitcoin

Ve el coste en sat/vB y USD de una transacción Bitcoin.

Abrir herramienta

Validador de base 1099-DA cripto

Concilia la base de coste cripto contra el nuevo 1099-DA.

Abrir herramienta

Recuperación de base de coste cripto

Estima cuánta base necesitas recuperar para cuadrar tu 8949.

Abrir herramienta

Calculadora de devolución de fianza

Estima cuánto de la fianza puede deducir el casero y cuánto recuperas.

Abrir herramienta

Arrendamiento vs. compra (con valor residual)

Decide si arrendar o comprar al contado.

Abrir herramienta

Detector de comisiones ocultas en préstamos de auto

Compara la cuota mensual cotizada con la matemática del APR publicado.

Abrir herramienta

Comparador de pools de minería Bitcoin

Compara comisiones de pool y rentabilidad para tu tasa de hash.

Abrir herramienta

Detector de asientos zombi SaaS

Identifica asientos SaaS sin usar y el coste mensual.

Abrir herramienta

TCO de almacenamiento en nube

Estima los costes mensuales y anuales de S3 / Wasabi / B2.

Abrir herramienta

Estimador de manutención de menores

Estima la manutención mensual según ingresos y custodia.

Abrir herramienta

Seguro de cuidados a largo plazo vs. autoasegurarse

Vea si le conviene contratar un seguro de LTC o autoasegurarse.

Abrir herramienta

Coste de envío de última milla

Estima el coste por paquete de envío de última milla.

Abrir herramienta

Accesibilidad de vivienda según ingreso

Estima el precio de vivienda que puedes pagar según ingreso bruto mensual.

Abrir herramienta

ESPP con valor de lookback

Estima el valor y los impuestos de una oferta ESPP con lookback.

Abrir herramienta

ROI de actualización Wi-Fi

Vea si una actualización a Wi-Fi 6E/7 vale la pena.

Abrir herramienta

Coste mensual de API LLM

Estima el coste de inferencia LLM a un volumen mensual dado.

Abrir herramienta

Dilución y valor de concesión de acciones

Calcula el valor adquirido y el spread de una concesión.

Abrir herramienta

Puntuación de oferta vs. mínimo histórico

Puntúa un precio actual frente al mínimo histórico.

Abrir herramienta

Estimador de tiempo de lectura

Estima el tiempo de lectura para un libro o PDF.

Abrir herramienta

Coste de construcción de almacén pequeño

Estima capex de equipamiento y opex mensual de un almacén pequeño.

Abrir herramienta

Coste de inferencia de IA local

Vea si ejecutar un LLM local en una GPU es más barato que una API alojada.

Abrir herramienta

Coste de instancia de GPU en la nube

Compara costes de instancias de GPU bajo demanda, spot y reservadas.

Abrir herramienta