6 calculators
Loans, mortgages and cards: the payment, the true interest cost and the payoff date.
16 free calculators · No sign-up
Free personal finance calculators
16 calculators for borrowing, saving, pay and tax, and selling online. Each one shows its formula, a worked example and the sources behind every figure, and is tested against lender, spreadsheet and official numbers before it is published.
Inside the numbers
A mortgage, over time
Annual payments · USD
Year 1
- Principal$3,353.12
- Interest$19,401.28
A starting point for your next decision
Choose an area, or go straight to a calculator.
4 calculators
Growth, goals and retirement, in today's money as well as tomorrow's.
3 calculators
What you actually take home, in any pay period and any currency.
3 calculators
Margins and marketplace fees, so you know the profit before you list.
Numbers you can check
How results are checkedSee how the result is calculated
Each calculator includes its method and a worked example. Use the breakdown to check the assumptions behind your result.
Check the payment schedule
Amortisation schedules round each payment period and settle the final balance. Your lender's interest and rounding conventions may produce different figures.
One link holds the whole scenario
Your inputs live in the page address. Bookmark a result, send it to a partner or adviser, and it opens with the same inputs.
Data with sources and dates
Tax bands, inflation data and marketplace fees carry their official sources, effective dates and freshness checks. You can see which rules a result uses.