Forex Compounding Calculator
Compounding means reinvesting each period's gains so the next period works on a larger base. This Forex Compounding Calculator shows how a starting balance would grow if you added a fixed percentage per period and let it compound, and it prints a period-by-period table so you can see the curve.
It is a mathematical projection of a constant input rate - a hypothetical illustration, not a forecast. Real trading returns vary every period and can be negative, so treat the output as an arithmetic example of compounding, not an expected result.
How to use it
- Starting balance - the amount you begin with.
- Gain per period - the percentage added each period (a negative value models a steady loss).
- Number of periods - how many periods to compound over.
- Period label - cosmetic; choose day, week, month, quarter or year to label the table.
Each period multiplies the running balance by (1 + gain%). The table shows the balance and cumulative profit at the end of every period, and the summary shows the final balance and total growth.
FAQ
Is a constant per-period gain realistic?
No - real returns fluctuate and include losing periods. The calculator assumes a fixed rate purely to illustrate the mathematics of compounding.
What does compounding actually do?
It reinvests profits so each period grows a larger base, which is why the curve bends upward over time rather than rising in a straight line.
Can I model losses?
Yes. Enter a negative gain per period to see how a steady drawdown compounds downward.
Does this predict my returns?
No. It is an arithmetic illustration based on a rate you choose, not a projection of trading performance.
Is my data saved?
No. It runs entirely in your browser.
See also the free trading tools hub and please read our risk disclosure.