COMPOUND INTEREST CALCULATOR
Compound Interest Calculator
See how your money grows when the same return repeats.
Your inputs
The return applied once per period, not an annual rate unless each period is a year.
Gains and losses compound each period. No contributions, withdrawals, taxes or fees are included. Use the same currency for all amounts.
The link includes your entered amounts. Anyone with the link can view them.
Gain of 0 from 0
Balance by period
Period details
Amounts are displayed to 2 decimal places. Calculations use unrounded values.
| Period | Balance | Gain / loss | Total return |
|---|---|---|---|
| Start | 0 | 0 | — |
How is compound growth calculated?
Final balance = Starting amount × (1 + Return per period ÷ 100)Periods
For example, 1,000 compounded at 2% for 30 periods becomes approximately 1,811.36. Both gains and losses carry into the next period.
What does a period mean?
You choose the unit. A monthly return means one period is a month; a return per trade means one period is a trade. Do not enter an annual rate as a monthly rate. This tool assumes the same return repeats, rather than forecasting market returns.
A mathematical scenario assuming a constant return. Results do not predict or guarantee investment performance.