Using this forex compound calculator
This tool uses the same two-column layout as our other finance calculators: enter account details on the left, then click Calculate to see projected growth on the right. It is designed for traders who want to model steady monthly or yearly returns compounded over a chosen horizon.
- Set your start balance — the opening account equity in your chosen currency.
- Enter a percentage rate — monthly (default) or yearly. The calculator converts yearly rates to an equivalent monthly rate before compounding.
- Choose duration and compounding — years and months, plus monthly, quarterly, annual, or daily compounding frequency.
- Add contributions (optional) — regular deposits or withdrawals on a monthly, quarterly, half-yearly, or yearly schedule.
- Review the breakdown — yearly growth table or stacked chart showing principal versus accrued growth.
What is forex compounding?
Compounding reinvests each period’s gains back into the account so the next period earns on a larger balance. A trader quoting “5% per month” is describing a monthly return applied to the current equity — not a flat dollar amount. Over many months, even modest consistent returns produce large absolute gains because the base keeps growing.
This calculator assumes a fixed percentage return each period. Real trading results vary with drawdowns, position sizing, spreads, and fees. Use projections for planning and education, not as promises of future performance.
Monthly compounding formula
When returns compound every month for tm months at monthly rate rm:
r_m = monthly return (decimal), t_m = total months
Effective annual rate
A 5% monthly return compounds to far more than 60% per year. Convert a monthly rate to its effective annual equivalent with:
Effective annual return from a monthly rate
Worked example
With the default inputs ($10,000 at 5% per month for 5 years, compounded monthly):
$10,000 at 5% per month for 5 years (60 months), compounded monthly
Small changes in the monthly rate or compounding interval shift the outcome dramatically. Always sanity-check assumptions against realistic win rates, risk per trade, and capital preservation rules.
Compounding frequency reference
| Frequency | Periods per year | Typical use |
|---|---|---|
| Monthly | 12 | Default for monthly return projections |
| Quarterly | 4 | Less frequent profit reinvestment |
| Annually | 1 | Year-end equity reset models |
| Daily | 365 | High-frequency reinvestment approximations |
Reading the breakdown
- Yearly table — growth earned each year, cumulative growth (highlighted), and running balance.
- Chart view — stacked bars for total principal (blue) and accrued growth (yellow).
- Rate of return (RoR) — total growth divided by total capital invested over the full period.
For side-by-side comparisons with bank-style interest, use the Compound Interest or Simple Interest tabs above.
Examples and use cases
Real-world use cases
- Trading plan review: A forex trader models reinvesting a conservative 2% monthly return on a $5,000 account to set realistic long-term expectations.
- Prop firm goal: Someone projects how monthly deposits plus modest gains compound toward a funded-account target over 18 months.
- Risk reality check: A beginner compares a hypothetical 10% monthly return projection against a 0.5% monthly scenario to see how assumptions change outcomes.