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Forex compound calculator
Enter a starting balance, a gain per period and how many periods. See the end balance, what compounding adds and the balance after each period — with deposits or withdrawals if you make them.
- Read-only
- Never places trades
- No password
Negative for a losing period.
Optional. A negative amount is a withdrawal.
Runs in your browser: your numbers are not saved or sent.
What a monthly gain grows into
A 10,000 account, the same gain every month, nothing added or taken out — worked out by the same formula as the calculator:
| Gain a month | After 12 months | After 24 months | 24 months, no compounding |
|---|---|---|---|
| 1% | 11,268.25 | 12,697.35 | 12,400.00 |
| 2% | 12,682.42 | 16,084.37 | 14,800.00 |
| 5% | 17,958.56 | 32,251.00 | 22,000.00 |
| 10% | 31,384.28 | 98,497.33 | 34,000.00 |
- Balance after n periods = start × (1 + r)ⁿ
- With A added each period: + A × ((1 + r)ⁿ − 1) ÷ r
- Without compounding = start × (1 + r × n)
- Periods to double = ln 2 ÷ ln(1 + r)
Before you plan on it
- The same gain every period is the calculator’s assumption, not the market’s. Months alternate, and losses compound too: +10% and then −10% leaves 99% of the balance, not 100%.
- A drawdown takes more to undo than it took away: after −20% you need +25% to get back, after −50%, +100%.
- Compounding means sizing every trade as a % of the current balance. With a fixed lot size the gains do not compound at all.
- Put in the gain you actually make: your average month from your own history, after commission and swap and with the losing months in it — not a target.
- Taking profits out every month? Enter them as a negative amount added each period.
What a losing streak does to a compounding account: risk of ruin →All free tools →
Questions
›How do I calculate compound growth in forex?
Multiply the balance by (1 + the gain per period) once for every period. 10,000 at 2% a month for 12 months: 10,000 × 1.02¹² = 12,682.42.
›Is 10% a month realistic?
It compounds to ×3.14 in a year and ×9.85 in two. Plan with your own average month — after costs, losing months included — rather than with a target, and check what a run of losses does at your risk per trade.
›Per trade, day, week or month?
The maths is the same; the period is only a label. Use the one you measure: a gain per trade if you risk a fixed % per trade, a gain per month to compare with a prop firm’s profit target.
›How do deposits and withdrawals work here?
The amount lands at the end of each period and starts growing from the next one. A negative amount is a withdrawal; if withdrawals empty the account, the calculator says in which period.
Plan with the gain you really make
The journal shows each month’s result after commission and swap, from your MT4/MT5 history — the number to put into this calculator. Free for one account.
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