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Tools › Position size calculator

Forex position size calculator

Enter how much you are willing to lose if the stop loss is hit. The calculator returns the trade size that keeps the loss to that amount.

Position size 0.20 lots
  • Amount at risk: 100.00
  • Units: 20,000
  • Pip value for this size: 2.00

How it is worked out

  1. Amount at risk = balance × risk %.
  2. Pip value for 1 standard lot (100,000 units) = pip size × 100,000, in the pair's second currency.
  3. That pip value is converted into your account currency, using the pair price or the rate you enter.
  4. Lots = amount at risk ÷ (stop loss in pips × pip value per lot).

Your broker may round to its minimum lot step (often 0.01). Spread, commission and slippage can make the real loss larger than the amount shown.