Lot Size Calculator
Calculate the correct lot size for forex trades based on your account balance, risk percentage, and stop loss in pips.
$
%
pips
$
/pip
Result
Lot Size
0.20 lots
Units
20,000 units
Risk Amount
$100.00
Potential Loss
$100.00
Formula: Lot Size = Risk Amount / (Stop Loss in Pips × Pip Value)
Standard lot = 100,000 units | Mini lot = 10,000 units | Micro lot = 1,000 units
How to use the lot size calculator?
Enter your account balance, the percentage you are willing to risk per trade, the stop loss distance in pips, and the value of one pip for your chosen currency pair. The calculator shows the maximum lot size you can trade while staying within your risk budget.
Formula
Example
With a $10,000 account, 1% risk ($100), a 50-pip stop loss, and a pip value of $10, the maximum lot size is 100 / (50 × 10) = 0.20 lots (20,000 units). A loss at the stop would cost exactly $100, keeping your risk within the 1% rule.
FAQs
- What is a pip? A pip (percentage in point) is the smallest standard price move in forex. For most pairs it is 0.0001; for JPY pairs it is 0.01.
- How do I find the pip value? Pip value depends on the pair, lot size, and your account currency. Many brokers display it in the trade ticket; otherwise it can be calculated from the exchange rate.
- Does this work for crypto CFDs? Yes — substitute the pip (tick) size and per-tick value for the specific crypto instrument.
Common Use Cases
- Forex traders sizing standard, mini, or micro lots before placing a trade.
- Beginners learning to cap trade risk at a fixed percentage of their account.
- Comparing lot sizes across different currency pairs with different pip values.