Money calculators that show their work
Free, clear calculators for everyday money decisions. Results update as you type, and your numbers stay in your browser.
How Ratewit works
- Every calculator shows its formula and a worked example, so you can check the math yourself.
- Each build of the site re-runs hand-checked test cases and stops if any result is off by a cent.
- No sign-up. The numbers you type are calculated on your device and are not sent anywhere.
Results are estimates for planning and comparison. They are not a loan offer or financial advice; your lender's figures are the ones that count.