Position Sizing Calculator
Free Position sizing Calculator for crypto & forex. Enter your numbers to see returns, costs, and optimized scenarios instantly.
Reviewed for accuracy by Sahil, Senior Finance & Tax Editor
Position Sizing Calculator
Calculator
Adjust values & calculateEnter your values below. Every result is computed in your browser — no data is sent to any server.
Formula: Lot Size = (Account Balance × Risk %) / (Stop Loss Pips × Pip Value)
Worked example — Trade 0.20 standard lots (20,000 units)
Formula
Lot Size = (Account Balance × Risk %) / (Stop Loss Pips × Pip Value)
Position size (units) = (Account Balance × Risk%) / (Entry Price − Stop Loss Price). Unlike lot-size calculators that work in forex lot increments, this version outputs position size in shares or units for equities and crypto. Enter your account size, the percentage you are willing to lose per trade, and your entry/stop prices to find the exact number of units to buy.
Worked Examples
Example 1: Conservative Risk Management
Problem:Account: $5,000 | Risk: 1% | Stop Loss: 25 pips on EUR/USD
Solution:Risk amount = $5,000 × 1% = $50 Pip value per standard lot = $10 Lot size = $50 / (25 × $10) = 0.20 standard lots = 2.0 mini lots = 20 micro lots
Result:Trade 0.20 standard lots (20,000 units)
Example 2: Aggressive Day Trading
Problem:Account: $25,000 | Risk: 2% | Stop Loss: 15 pips on GBP/USD
Solution:Risk amount = $25,000 × 2% = $500 Pip value per standard lot = $10 Lot size = $500 / (15 × $10) = 3.33 standard lots = 333,000 units
Result:Trade 3.33 standard lots (maximum risk: $500)
Frequently Asked Questions
How does leverage affect lot size?
Leverage determines how much margin (capital) you need to open a position, but it should NOT change your lot size calculation. Your lot size should always be based on risk management (the amount you're willing to lose), not on maximum leverage. For example, with 1:100 leverage you CAN open a 1 standard lot position with only $1,000 margin, but if your risk calculation says 0.33 lots, use 0.33 lots regardless of available leverage. Higher leverage just means more rope to hang yourself with if misused.
What is the difference between standard, mini, and micro lots?
In forex, lot sizes determine position volume: Standard lot = 100,000 units of base currency (1 pip ≈ $10 on USD pairs). Mini lot = 10,000 units (1 pip ≈ $1). Micro lot = 1,000 units (1 pip ≈ $0.10). Nano lot = 100 units (1 pip ≈ $0.01, available at some brokers). Most brokers allow fractional lots, so you can trade 0.15 or 2.73 standard lots. Always choose the lot size that matches your risk management plan, not the maximum your margin allows.
References
Reviewed for accuracy by Sahil, Senior Finance & Tax Editor · Editorial policy
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