Position Size Calculator
Find the exact lot size that keeps a loss within your risk budget. Built for prop firm rules: 1% risk, 5% daily drawdown, and everything around them.
Input
~1.085 · default value (no live feed)
Auto-filled from the selected pair. Override if your broker quotes differently.
Advanced settings
Refine the calculation with your broker's real costs. Spread and commission trim the effective position size.
Added to the stop distance. A wider spread reduces the position size.
Round-trip commission per standard lot. Typical: $3–$7.
Used to calculate the margin required on the position.
No live feed for this pair; using the default value.
Pip size: 0.0001 · Base: EUR · Quote: USD
Result
Low margin usage: you have flexibility to add positions or scale in. Risking 1% or less per trade is ideal for prop firm challenges.