Forex Calculator Suite
8 free interactive calculators covering every essential forex math: pip value, position size, drawdown recovery, margin, profit/loss, compound growth, risk of ruin (Monte Carlo), and overnight swap. Each one runs entirely in your browser — no data sent anywhere, no signup, mobile-first.
Pip Value Calculator — Forex, Gold, and Crypto
A pip is the smallest standardized price movement in forex (0.0001 on majors, 0.01 on JPY pairs and XAUUSD). Pip value = pip size × contract size × lot size, optionally converted to your account currency. For 1.0 lot of EURUSD with a USD account, 1 pip = $10. For XAUUSD it's $1/pip per lot because gold's contract is 100 oz, not 100,000 units.
Open calculator →
Position Size Calculator — Forex Risk-Per-Trade Sizing
Fixed-fractional position sizing risks a constant percentage of account equity per trade. The formula is Lot Size = Risk Amount ÷ (Stop Pips × Pip Value Per Lot in Account Currency). For a $5,000 USD account risking 1% on a 40-pip EURUSD stop, that's $50 ÷ (40 × $10) = 0.125 lots, rounded down to 0.12 for the broker increment. Every retail and institutional risk framework uses this formula.
Open calculator →
Drawdown Calculator — Recovery Math for Forex Traders
Drawdown recovery is asymmetric: a 10% drawdown needs an 11.1% gain to recover, 20% needs 25%, 50% needs 100%, 90% needs 900%. The formula is recovery_pct = 100 × drawdown_pct ÷ (100 − drawdown_pct). The asymmetry is why bounded drawdown matters more than absolute returns — an EA with 50% annual return and 40% drawdown is worse than one with 20% return and 8% drawdown, despite the headline number.
Open calculator →
Forex Margin Calculator — Leverage and Required Margin
Required margin = (lot size × contract size × price) ÷ leverage. For 1.0 lot EURUSD at 1.085 with 1:30 leverage: $100,000 × 1.085 ÷ 30 = $3,617 of equity locked while the trade is open. Higher leverage reduces margin requirement but doesn't change risk per trade — it just frees more equity for other positions. Margin level = (equity ÷ margin) × 100; below 100% triggers margin call, below 50% triggers forced stop-out on most retail brokers.
Open calculator →
Forex Profit / Loss Calculator — Entry to Exit P&L
P/L = (exit − entry) ÷ pip size × pip value per lot × lot size for long trades, with the sign flipped for shorts. For a 0.10 lot EURUSD buy entered at 1.085 and closed at 1.090, that's 50 pips × $1/pip = $50 profit. Same trade as a sell would be a $50 loss. The calculator handles JPY pairs (pip = 0.01), gold (pip = 0.01, contract = 100 oz), and non-USD accounts with FX conversion.
Open calculator →
Forex Compound Growth Calculator — Account Projection
Compound growth uses the formula ending = starting × (1 + r)^n where r is the periodic return and n is the number of periods. A $5,000 account earning 2% monthly compounded over 24 months reaches $8,033, doubling roughly every 3 years. With $100 monthly withdrawals, the same setup ends at $5,167 — the compounding still beats inflation but withdrawal dramatically slows growth. Use realistic per-period returns, not annualised wishful thinking.
Open calculator →
Risk of Ruin Calculator — Monte Carlo Forex EA Survival
Risk of ruin is the probability a trading strategy will eventually hit a catastrophic drawdown — the rate at which the strategy blows up given infinite time. The calculator runs Monte Carlo simulation: 10,000 sequences of 1,000 trades each, given your win rate, average win/loss ratio, and risk-per-trade percentage. A 55% win rate / 1.5 R:R / 1% risk strategy has roughly 0.1% risk-of-ruin at the 50% drawdown threshold — sustainable. The same strategy at 5% risk-per-trade has ~30% risk of ruin — unsustainable.
Open calculator →
Forex Swap Cost Calculator — Overnight Rollover
Swap is the overnight financing cost (or credit) for holding a position past 5pm New York time. Brokers quote swap in points; convert to monetary value via point_size × contract_size × lot_size × swap_points × FX_to_account. Wednesdays apply triple swap to cover weekend financing — a 0.10 lot EURUSD long at −7.5 swap points held for 7 nights costs roughly $7.50 (6 nights × $0.75 + 1 Wednesday × $2.25). Some pairs/sides have positive swap (broker pays you).
Open calculator →
Want step-by-step guidance?
Each calculator pairs with a deep-dive guide that explains the math, edge cases, and operational considerations.
Browse how-to guides →