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49 calculators are live now. New calculators are grouped by everyday tasks, money, health, business, social metrics, and writing.
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Percentage Calculatorpercentage calculatorPercent Change Calculatorpercent change calculatorAverage Calculatoraverage calculatorFraction Calculatorfraction calculatorDate Calculatordate calculatorDays Between Dates Calculatordays between dates calculatorAge Calculatorage calculatorTime Duration Calculatortime duration calculatorHours Calculatorhours calculatorGrade Calculatorgrade calculatorGPA CalculatorGPA calculatorTip Calculatortip calculatorDiscount Calculatordiscount calculatorSales Tax Calculatorsales tax calculatorUnit Price Calculatorunit price calculatorUnit Converterunit converterCooking Conversion Calculatorcooking conversion calculatorRecipe Scalerrecipe scalerMortgage Calculatormortgage calculatorRent Affordability Calculatorrent affordability calculatorAuto Loan Calculatorauto loan calculatorLoan Payment Calculatorloan payment calculatorLoan Comparison Calculatorloan comparison calculatorRefinance Calculatorrefinance calculatorCredit Card Payoff Calculatorcredit card payoff calculatorDebt Snowball Calculatordebt snowball calculatorSalary Calculatorsalary calculatorHourly to Salary Calculatorhourly to salary calculatorPaycheck Calculatorpaycheck calculatorTax Estimate Calculatortax estimate calculatorBudget Calculatorbudget calculatorNet Worth Calculatornet worth calculatorEmergency Fund Calculatoremergency fund calculatorSavings Goal Calculatorsavings goal calculatorSavings Interest Calculatorsavings interest calculatorCompound Interest Calculatorcompound interest calculatorRetirement Calculatorretirement calculatorInflation Calculatorinflation calculatorBMI CalculatorBMI calculatorCalorie Calculatorcalorie calculatorMacro Calculatormacro calculatorDue Date Calculatordue date calculatorWord Counterword counterCash Runway Calculatorcash runway calculatorProfit Margin Calculatorprofit margin calculatorFreelance Rate Calculatorfreelance rate calculatorInvoice Generatorinvoice generatorTikTok Engagement Rate Calculatortiktok engagement rate calculatorBrand Deal Calculatorbrand deal calculator
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High-use calculators in the library.
A short path into the pages people are most likely to need for money, shopping, work, health, writing, and everyday math.
Task index
Browse calculators by the thing you need to decide.
The full directory is below, but these task groups surface the pages people usually need first.
Shop, split, and compare prices
Fast calculators for discounts, sales tax, tips, unit prices, and percentage checks before you buy.
Plan monthly money decisions
Budget, paycheck, emergency fund, rent, and savings calculators for household planning.
Compare loans and payoff plans
Loan calculators for monthly payments, mortgage planning, refinancing, auto loans, and debt payoff.
Check dates, time, and school math
Everyday calculators for date ranges, age, time duration, grades, GPA, averages, and fractions.
Estimate health and nutrition numbers
Simple health calculators for BMI, calorie targets, macros, and due-date estimates.
Price, bill, and run a small business
Practical calculators for pricing, invoicing, margins, freelance rates, and cash runway.
Profit margin calculatorGross margin, net margin, markup, and break-even revenueFreelance rate calculatorHourly rate, day rate, billable hours, and revenue targetInvoice generatorLine items, tax, discount, subtotal, and balance dueCash runway calculatorRunway from cash balance, revenue, and monthly expenses
Work with text and online metrics
Writing and social calculators for word counts, sponsorship pricing, engagement, and online publishing checks.
Quick daily math
Everyday Calculators
Common calculators for percentages, dates, tips, age, time, units, and other everyday questions.
Percentage CalculatorUse this percentage calculator for common percent math: find a percent of a number, calculate percentage change, or work out what percent one value is of another.OpenPercent Change CalculatorUse this percent change calculator to compare an old value with a new value and see the percentage increase or decrease.OpenAverage CalculatorUse this average calculator to find the mean, median, count, and sum from numbers separated by commas, spaces, or line breaks.OpenFraction CalculatorUse this fraction calculator to solve common fraction math and see the simplified fraction, mixed number, and decimal result.OpenSales Tax CalculatorUse this sales tax calculator to estimate tax and final checkout price after an optional discount.OpenDiscount CalculatorUse this discount calculator to find the sale price, savings, and estimated total after tax for coupons, markdowns, and shopping deals.OpenUnit Price CalculatorUse this unit price calculator to compare two products with different prices and package sizes by cost per unit.OpenDate CalculatorUse this date calculator to add or subtract time from a date and count the days or weeks between two calendar dates.OpenDays Between Dates CalculatorUse this days between dates calculator to count calendar days, weeks, and weekdays between a start date and an end date.OpenAge CalculatorUse this age calculator to find exact age in years, months, and days, total days alive, and days until the next birthday.OpenTime Duration CalculatorUse this time duration calculator to find hours and minutes between two times, subtract breaks, and estimate pay from an hourly rate.OpenHours CalculatorUse this hours calculator to estimate weekly work hours after breaks and calculate weekly pay from an hourly rate.OpenGrade CalculatorUse this grade calculator to estimate the final exam score needed for a target course grade and preview your projected final grade.OpenGPA CalculatorUse this GPA calculator to estimate semester GPA from up to four classes, credit hours, and letter-grade point values.OpenTip CalculatorUse this tip calculator to calculate a tip, total bill, and per-person split for restaurants, delivery, rides, and services.OpenUnit ConverterUse this unit converter for quick length, weight, volume, temperature, and speed conversions.OpenCooking Conversion CalculatorUse this cooking conversion calculator to convert teaspoons, tablespoons, cups, ounces, grams, milliliters, and recipe serving amounts.OpenRecipe ScalerUse this recipe scaler to resize recipes for more or fewer servings and convert each ingredient by the same multiplier.Open
Personal finance
Money Calculators
Simple calculators for budget, tax estimates, emergency funds, debt payoff, loans, savings, rent, salary, and household money math.
Compound Interest CalculatorUse this compound interest calculator to estimate future savings from a starting balance, monthly contribution, annual return, and time horizon.OpenSavings Goal CalculatorUse this savings goal calculator to estimate months to goal, monthly contribution needed, and projected balance from savings and return assumptions.OpenInflation CalculatorUse this inflation calculator to estimate how prices may change over time and what today's money may be worth in future dollars.OpenLoan Payment CalculatorUse this loan payment calculator to estimate monthly payments, total interest, and total paid over the life of a loan.OpenAuto Loan CalculatorUse this auto loan calculator to estimate a car payment from vehicle price, down payment, trade-in, sales tax, fees, APR, and loan term.OpenCredit Card Payoff CalculatorUse this credit card payoff calculator to estimate months to debt-free, total interest, and total paid from balance, APR, and monthly payment.OpenMortgage CalculatorUse this mortgage calculator to estimate a monthly house payment from home price, down payment, interest rate, taxes, insurance, and HOA fees.OpenSalary CalculatorUse this salary calculator to convert hourly pay into annual salary, monthly pay, weekly pay, and a rough after-tax estimate.OpenHourly to Salary CalculatorUse this hourly to salary calculator to convert an hourly wage into annual, monthly, weekly, and daily pay.OpenPaycheck CalculatorUse this paycheck calculator to estimate gross and take-home pay from hourly rate, weekly hours, overtime, tax estimate, and pay frequency.OpenRent Affordability CalculatorUse this rent affordability calculator to estimate a monthly rent target from income, debt payments, savings goals, utilities, and rent-to-income rules.OpenBudget CalculatorUse this budget calculator to compare monthly income against housing, food, transportation, debt, savings, and other spending.OpenTax Estimate CalculatorUse this tax estimate calculator for a quick planning estimate from annual income, deductions, an estimated tax rate, credits, and tax already withheld.OpenEmergency Fund CalculatorUse this emergency fund calculator to estimate how much cash to keep for emergencies and how long it may take to reach the target.OpenDebt Snowball CalculatorUse this debt snowball calculator to estimate how extra payments can change payoff time and interest across multiple debt balances.OpenNet Worth CalculatorUse this net worth calculator to add assets, subtract liabilities, and track a simple personal balance sheet.OpenRetirement CalculatorUse this retirement calculator to project future savings and estimate whether current contributions are on track for a target amount.OpenRefinance CalculatorUse this refinance calculator to compare a current payment with a new estimated payment and see how long closing costs may take to break even.OpenLoan Comparison CalculatorUse this loan comparison calculator to compare two loan offers by monthly payment and total interest before choosing a term or rate.OpenSavings Interest CalculatorUse this savings interest calculator to estimate future balance and interest earned from a starting balance, monthly deposits, APY, and time.Open
Body and nutrition
Health Calculators
Quick health and fitness calculators for BMI, calorie estimates, weight ranges, and everyday wellness planning.
BMI CalculatorUse this BMI calculator to estimate body mass index, BMI category, and a healthy BMI weight range from height and weight.OpenCalorie CalculatorUse this calorie calculator to estimate maintenance calories, BMR, and simple daily targets for gradual weight loss or gain.OpenMacro CalculatorUse this macro calculator to convert a calorie target and macro split into grams of protein, carbs, and fat.OpenDue Date CalculatorUse this due date calculator to estimate a pregnancy due date from the first day of the last menstrual period and average cycle length.Open
Work and pricing
Business Calculators
Practical calculators for rates, invoices, cash runway, profit, pricing, and small business planning.
Cash Runway CalculatorUse this cash runway calculator to estimate how long current cash will last at a given monthly burn rate.OpenProfit Margin CalculatorUse this profit margin calculator to compare revenue, cost of goods, operating expenses, markup, break-even revenue, and target net margin.OpenFreelance Rate CalculatorUse this freelance rate calculator to work backward from your take-home income goal, tax reserve, business expenses, billable hours, and time off.OpenInvoice GeneratorUse this invoice generator to calculate line item totals, subtotal, discount, tax, and balance due for a simple client invoice.Open
Social metrics
Social Media Calculators
Useful calculators for engagement rate, views, sponsorship pricing, and social media revenue estimates.
TikTok Engagement Rate CalculatorUse this TikTok engagement rate calculator to compare videos, estimate account performance, and turn raw TikTok metrics into a clear percentage.OpenBrand Deal CalculatorUse this free brand deal calculator to estimate a sponsorship price from audience size, engagement rate, deliverables, production cost, usage rights, and exclusivity.Open