Free personal finance calculators

12 calculators, free to use with no sign-up. They work in any currency, run in your browser, and show the formula and the assumptions under every result. Nothing you type leaves your device.

Saving

Emergency fund calculatorHow many months of costs to keep, and when you'll get there.Also free in the app
Savings goal calculatorHow much to put aside each month to reach a target by a date.Also free in the app

Investing

Compound interest calculatorWhat a starting sum plus a monthly amount grows to, in today's money too.Also free in the app
Cost of waiting to investWhat starting five years later costs, and the monthly amount that catches up.Also free in the app
Investment fee calculatorWhat a fund or platform fee costs over 10, 20 or 30 years.Also free in the app

Debt

Debt payoff calculatorSnowball or avalanche: your debt-free date and total interest both ways.Also in Scroll Plus

Budgeting

50/30/20 budget calculatorSplit take-home pay into needs, wants and savings, weekly to yearly.Also in Scroll Plus

Early retirement (FIRE)

United States

Trump account calculatorWhat a child's Trump account could hold at 18, by source of money.Web only

United Kingdom

Calculators give estimates for learning, based on the inputs and assumptions shown on each page. They aren't financial advice.