Finance
Pick a Finance calculator below. Every tool includes the formula, a worked example, and answers to common questions.
All calculators
Compound Interest Calculator
See how your savings grow when interest earns interest over time.…
Credit Card Payoff Calculator
Enter balance, APR, and your planned monthly payment to estimate months to zero and total interest. If the payment canno…
Currency Converter
Enter an amount, pick a source and target currency, and see the converted value with the cross-rate and rate date. Rates…
Discount Calculator
Enter the original price and discount percentage to see the sale price and how much you save — handy for sales, coupons,…
Hourly to Salary Calculator
Enter any pay rate and period to see the equivalent hourly, daily, weekly, biweekly, monthly, and annual figures — based…
Income Tax Calculator
Approximate annual income tax using simplified progressive brackets. See estimated tax owed and your effective rate — fo…
Inflation Calculator
See what a past amount is worth in another year using approximate U.S. CPI-U annual averages — or project how today’s mo…
Loan Calculator
Estimate your monthly payment for personal or auto loans.…
Markup vs Margin Calculator
Retail and wholesale pricing confuse markup (profit ÷ cost) with margin (profit ÷ price). Solve for price, convert betwe…
ROI Calculator
Measure gain or loss relative to what you invested. Enter the initial outlay and the final (or current) value to get ROI…
Savings Goal Calculator
Set a target amount, what you have already saved, and how many months you have. See the flat monthly deposit needed if y…
Take-Home Pay Calculator
Convert gross annual pay to estimated net take-home after progressive income tax and optional payroll/social deductions …
VAT Calculator
Calculate VAT or sales tax both ways: tax-exclusive → inclusive, or extract net and tax from an inclusive price. Presets…
Regional versions
UK Income Tax
Approximate UK Income Tax using a simplified personal allowance and progressive bands. For learning and ballpark plannin…
United StatesUS Federal Income Tax
Approximate U.S. federal income tax using simplified progressive brackets for single or married status. See estimated ta…