Calculator · taught at the green belt

Position Size Calculator

Tell it your account balance, the percentage you are willing to risk, and your stop distance in pips. It returns the exact lot size that keeps your loss within your rule — the single most useful calculation in trading, and the one that lets you place stops on the chart instead of on your comfort level.

lots = (balance × risk%) ÷ (stop pips × pip value per lot)

Pip value Position size Risk / reward

Account balance

Risk per trade (%)

Most beginners keep this at 1% or below.

Stop-loss distance (pips)

Measure this from the chart — where the idea is wrong — not from what feels tolerable.

Pip value per standard lot

About $10 for most USD-quoted pairs on a standard lot.

Position size

0.067

standard lots

Risk amount20.00

Micro lots6.7

Units6,667

Loss if stopped20.00

Reference values

Scenario	Result
2,000 balance · 1% risk · 30-pip stop	0.067 standard lots
10,000 balance · 1% risk · 50-pip stop	0.200 standard lots
5,000 balance · 0.5% risk · 25-pip stop	0.100 standard lots

Where this is taught

This calculator exists because of a specific lesson. If the inputs above are not obvious, read it first — open the lesson.

The other calculators

Pip Value CalculatorSee exactly what one pip is worth on your trade.White belt Risk / Reward CalculatorCheck that a trade is worth taking before you take it.Green belt

A word on precision

These calculators use the standard textbook formulas and assume the conversion rate you supply. Your broker's figures may differ slightly because of their own conversion timing, commission structure and rounding of lot sizes. Use these numbers to size the decision; use your platform's order ticket to confirm the exact fill.