Free Online Calculators for Finance, Tax, Health & Math

11+ free calculators for money, taxes, health and everyday math. No sign-up, no ads-wall — everything runs privately in your browser.

Finance

FinanceLoan CalculatorMonthly payment, total interest and a full amortization schedule.FinanceMortgage Refinance Break-Even CalculatorFind out how many months until a refinance pays for itself.FinanceCompound Interest CalculatorSee how savings and regular contributions grow over time.FinanceDebt Payoff CalculatorCompare snowball and avalanche strategies to get debt-free faster.

Tax

TaxUS Take-Home Pay CalculatorEstimate your paycheck after federal tax, state tax and FICA.TaxSalary After-Tax CalculatorEstimate take-home pay in the UK, Canada or Australia.TaxSelf-Employment Tax CalculatorEstimate 1099 self-employment tax and your quarterly payments.

Health

HealthTDEE & Macro CalculatorDaily calories to maintain, cut or bulk — plus macro split.

Math

MathPercentage CalculatorPercent of a number, percentage change, and X is what % of Y.

Everyday

EverydayAge CalculatorExact age in years, months, days — and days between two dates.EverydayUnit ConverterConvert length, weight and temperature between metric and imperial.

Take-home pay by state

See your paycheck after tax in your specific US state.

Browse all 50 states →

Salary after tax by country

Estimate your take-home pay in the UK, Canada or Australia.

Browse countries →