GBP/JPY Position Size Calculator
GBP/JPY — nicknamed the "Widow Maker" — regularly moves 150–200 pips in a single session. It combines the volatility of Cable with Yen carry-trade dynamics. Incorrect lot sizing here is the fastest path to a blown account.
Key Facts
POSITION SIZER
Multi-Asset Protocol
Recommended Position
Standard Lots
R:R Ratio
1:1.00
Total Risk
$500.00
How to Calculate GBP/JPY Position Size
Set Your Account Risk
Enter your account balance and maximum risk per trade (0.5%–2% recommended). For a $10,000 account risking 1%, your dollar risk is $100.
Define Your Stop Loss
Enter your entry price and stop loss level. The calculator measures the distance in pips and applies the correct pip value for GBP/JPY automatically.
Read Your Lot Size
The calculator outputs your exact lot size in standard lots, your R:R ratio, and your total risk amount. Adjust stop distance until the numbers fit your plan.
Position Size Formula
Risk Amount ($) = Account Balance × (Risk % ÷ 100)
SL Pips = |Entry – Stop Loss| ÷ Pip Size (0.01)
Lot Size = Risk Amount ÷ (SL Pips × Pip Value per Lot)
The TRADE90 calculator applies the correct pip value for GBP/JPY including JPY and exotic conversions automatically.