Compound Interest Calculator
See how savings grow with monthly compounding.
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yrs
How it works
Future value = P(1 + r)^n + PMT × ((1 + r)^n − 1) ÷ r, with interest compounded monthly.
FAQ
Is this calculator free?
Yes. No signup is needed and nothing you enter is stored.
Is the result exact?
Results are rounded for display. For financial, medical, or legal decisions, confirm with a professional.
Do my numbers leave my device?
No. The calculation runs in your browser.