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Position Size Calculator
Work out exactly how many lots to trade so that a losing trade never costs more than the share of your account you choose to risk. The calculation uses the live market rate for your pair.
Risk input
%
Stop loss
Recommended position size0.33 lots
Units33,333
Lot breakdown0 standard / 3 mini / 3 micro
Risk amount$100.00
Pip value at this size$3.33
Check the margin required for this position
Position size by risk and stop
Recommended lots for a $10,000 USD account on EUR/USD at common risk percentages and stop-loss distances, using the live rate.
| Risk per trade | 20-pip stop | 30-pip stop | 50-pip stop |
|---|---|---|---|
| 0.50% | 0.25 lots | 0.16 lots | 0.10 lots |
| 1.00% | 0.50 lots | 0.33 lots | 0.20 lots |
| 2.00% | 1.00 lots | 0.66 lots | 0.40 lots |
How it works
Risk amount = Balance × Risk %
Position size (lots) = Risk amount ÷ (Stop loss in pips × Pip value per lot)Worked example
With a $10,000 account risking 1% ($100) and a 30-pip stop on EUR/USD, one pip on a standard lot is worth $10, so the position size is $100 ÷ (30 × $10) = 0.33 lots — about 33,333 units, worth $3.33 per pip.
FAQ
What is position sizing in forex?
Position sizing is deciding how many lots or units to trade so that the money you lose if your stop loss is hit equals a fixed, planned share of your account — typically 1–2%. It converts a risk decision into an exact trade size.
How much of my account should I risk per trade?
Most risk-management frameworks suggest risking 1–2% of your account per trade. At 1%, ten consecutive losses would draw the account down roughly 10%, which is usually recoverable; risking 10% per trade, the same streak would wipe out most of the account.
Why does the calculator need a live exchange rate?
When your pair's quote currency differs from your account currency, the pip value must be converted at the current market rate. The calculator uses FXEmpire's live mid price and shows you the exact rate it used below the result.
What are standard, mini and micro lots?
A standard lot is 100,000 units of the base currency, a mini lot is 10,000 units and a micro lot is 1,000 units. The result breaks your recommended size into these lot types so you can enter it on any broker platform.
Can I size from entry and stop prices instead of pips?
Yes. Switch to Entry & stop price, enter both levels, and the calculator converts the distance into pips using the pair’s pip size (0.0001, or 0.01 for yen pairs) before sizing the position. The pip distance is stored in the URL so the same scenario can be shared.
Which account currencies are supported?
USD, EUR, GBP, JPY, CHF, CAD, AUD and NZD. When the pair’s quote currency differs from your account currency, pip value is converted at the live market rate shown under the result.
How do I share a calculation?
Use Copy link. The URL stores every input — including stop mode, entry and stop prices — so the same scenario reopens on any device.
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Convert lots to units and check what your size really risks at the stop.
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Margin & Leverage CalculatorRequired margin at any leverage tier, or the max size your margin allows.
Profit CalculatorP/L of a long or short trade in pips and money, at live prices.
Trading Risk KitR:R and breakeven win rate, risk of ruin, and Kelly criterion staking.
Compounding CalculatorProject account growth period by period with reinvested returns.
The results produced by these calculators are estimates based on live market prices and the inputs you provide. They are for informational purposes only and do not constitute investment advice. Actual trading conditions, including spreads, commissions, swap rates and broker margin requirements, may differ. Trading foreign exchange and CFDs carries a high level of risk and may not be suitable for all investors.
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