Compound Interest Calculator
Watch interest earn interest.
Interest is compounded monthly here. Returns are not guaranteed for investments; use a conservative rate.
Formula: A = P·(1 + r/12)^(12t) + PMT·((1 + r/12)^(12t) − 1) ÷ (r/12)
Results are estimates for general information, not medical or financial advice.
How it works
- Enter your values The result updates as you type.
- Switch units if needed Metric or US units, where it applies.
- Read the result Nothing is stored or sent anywhere.
FAQ
Is it free?
Yes. No account, no limits.
Is my data stored?
No. The calculation happens in your browser and nothing is sent to a server.