Calculate position size and money at risk based on your account balance, risk percentage, and stop loss in pips or price.
Lot Size Calculator
Position Size
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Money at Risk
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Frequently Asked Questions
Lot size is the volume of your trade. A standard lot is 100,000 units of the base currency; mini and micro lots are 10,000 and 1,000 units. Lot size determines how much you gain or lose per pip move.
Use the lot size calculator: enter your account balance, risk percentage (or fixed amount), and stop loss in pips or price. The calculator gives the position size in lots so your loss, if the stop is hit, equals your chosen risk.
Lots are standardised (e.g. 1 lot = 100,000 units for many pairs). Units are the raw contract size. Some brokers let you trade in units for finer control; the calculator supports both.
A wider stop loss (more pips or price distance) means you must trade a smaller lot size to keep the same money at risk. A tighter stop allows a larger position for the same risk.
Correct position sizing keeps risk per trade under control and helps avoid large drawdowns. Risking a fixed percentage of your account (e.g. 1–2%) per trade is a common rule.