ESTVELO / Tools / Position size
Free calculator

Forex position size calculator

Estimate how many standard lots correspond to a chosen account-risk amount and stop-loss distance. You can edit the pip value so the calculator is not locked to one currency pair.

Calculate lot size

Risk amount: $100.00 · Estimated size: 0.33 standard lots

Formula

Risk amount = Balance × Risk %
Lots = Risk amount ÷ (Stop pips × Pip value per standard lot)

The default $10 pip value is a common approximation for one standard lot on many USD-quoted major pairs when the account is in USD. It is not universal. Pip value changes with the pair, price, contract specification and account currency.

What changes pip value?

  • The currency pair and which currency is the quote currency.
  • The current exchange rate when account currency differs from the quote currency.
  • The broker's contract size and instrument specification.
  • Whether the product is spot FX, a CFD, future or another derivative.

For non-standard products, use the provider’s current tick-size/tick-value specification instead of assuming a universal $10 pip value.

Position size is not a loss guarantee

The calculator assumes the stop can be executed at the intended distance. Gaps, slippage, spread expansion, commissions and partial fills can make realized loss larger or smaller than the estimate.

Example

A $10,000 balance risking 1% means $100 of account risk. With a 30-pip stop and a $10 pip value per standard lot, the estimated position is 100 ÷ (30 × 10) = 0.33 lots.

This is a sizing estimate. Spread, slippage, commissions, gaps and broker contract specifications can change the realized loss.

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Use current broker specifications for actual contract and pip values. ESTVELO does not provide personalized investment advice.

Research essentials

Calculators and calendars organize inputs; they do not know your broker's complete contract specification or predict future price.

Use broker specificationsLot size, pip value, margin, quote currency, financing and trading hours can differ by instrument and provider.
Separate margin from riskMargin is the collateral needed to hold a position. The amount you can lose depends on position size, price movement and execution.
Expect event volatilityScheduled releases can alter spreads, liquidity and slippage. A calendar shows timing, not direction.
Validate outputsTreat calculator results as estimates and confirm the final numbers in the platform or provider documentation before trading.
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