Compound interest
Calculate compound growth from an initial amount, annual interest rate and time. See the formula and a worked example.
Inputs
Use the units shown—
Enter your values and select Calculate.
Formula & explanation
A = P(1 + r/100)ᵗ
Variables & units
- Initial amount
- currency · minimum 0
- Annual interest rate
- % · minimum 0
- Time
- years · minimum 0
Worked example
10,000 at 7% for 5 years grows to 14,025.52.
Assumptions
This assumes annual compounding, a fixed rate, and no fees or tax.
Formula version 1.0.0. JavaScript floating-point arithmetic applies. Results display up to 6 decimal places; stored values retain available precision. Use the units shown.
Practice with an example
Use the default input values to find the answer. The reset icon restores those values.
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