Lot Size
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Units
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Risk Amount
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When Should You Use a Lot Size Calculator?
Use this calculator before every forex trade to determine the correct lot size. It is especially useful when:
• You are trading currency pairs with different pip values
• You want to keep risk consistent at a fixed percentage of your account
• You are switching between standard, mini, and micro lots
• You need to quickly size a position during volatile market conditions
How It Works
1
Set Your Risk
Enter your account balance and the percentage you are willing to risk on this trade.
2
Define Stop Distance
Enter your stop-loss distance in pips and the pip value for your currency pair.
3
Get Your Lot Size
The calculator divides your dollar risk by the pip cost to give you the exact lot size.
Frequently Asked Questions
A lot is the standard unit of measurement in forex. A standard lot equals 100,000 units of the base currency. Mini lots are 10,000 units and micro lots are 1,000 units. The lot size you trade determines how much each pip movement is worth.
A pip (percentage in point) is the smallest standard price move in a currency pair. For most pairs it is the fourth decimal place (0.0001). For JPY pairs it is the second decimal place (0.01). One pip in EUR/USD with a standard lot is worth $10.
A standard lot is 100,000 units (1.00 lot), a mini lot is 10,000 units (0.10 lot), and a micro lot is 1,000 units (0.01 lot). Smaller lot sizes allow you to trade with less capital and lower risk per pip, making them ideal for beginners.
Most professional forex traders risk 1-2% of their account per trade. This means if your account is $10,000 you should risk no more than $100 to $200 on a single trade. Consistent risk management is the key to long-term profitability.
Pip value depends on the currency pair, lot size, and your account currency. For EUR/USD with a standard lot, one pip equals roughly $10. For other pairs or account currencies the pip value changes based on the exchange rate. Always check the pip value before sizing your position.