See what borrowing really costs

Free calculators for loans, mortgages, savings and debt. Each one shows its formula, so you can check the math yourself.

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Loan payment

Estimates only. Not financial advice.

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What you put inWhat interest adds

Numbers you can check

The formula is on the page

Every calculator explains how it reaches its answer, with a worked example you can follow by hand.

Checked against known values

We test each calculator against standard loan and savings figures before it goes live.

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Calculations run in your browser. We never see your numbers.

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