GBP/USD Lot Size Calculator

Position size calculator for British Pound / US Dollar

Work out the correct GBP/USD position size from your account balance, risk per trade and stop loss. GBP/USD is a forex pair quoted in US Dollar; the calculator handles its pip value and live currency conversion for you.

Live exchange ratesPre-set to GBP/USDRisk-based sizingFree tool
Guide & FAQ
Position inputs
Account, pair, stop, and risk settings
EUR
Stop input
pips
Position size
—
lots

For educational and planning purposes only. Always verify GBP/USD contract details with your broker.

GBP/USD FACTS

GBP/USD contract specification

These are the standard values the calculator uses for British Pound / US Dollar. Your broker may define them differently for forex pairs, so check the symbol specification in MT4/MT5 if a result looks off.

Base / quote
British Pound (GBP) / US Dollar (USD)
Pip size
0.0001
Contract size (1.00 lot)
100,000 GBP
Pip value per 1.00 lot
$10.00
WORKED EXAMPLE

GBP/USD position size example

A $5,000 account risking 1% ($50.00) on GBP/USD with a 30-pip stop:

Inputs

Balance
$5,000
Risk
1% ($50.00)
Stop loss
30 pips

Risk per lot

30 pips × $10.00 per pip

= Risk / 1.00 lot

$300.00

Position size

$50.00 risk ÷ $300.00 per lot

≈ Lots

0.167 lots

Note: The pip value is already in US dollars, so a USD account gets exactly 0.167 lots. In another account currency the calculator converts the pip value with live rates first.
GBP/USD FAQ

GBP/USD lot size FAQs

How do I calculate the lot size for GBP/USD?

Enter your account balance and currency, choose GBP/USD, set your risk per trade as a percentage (for example 1%), and enter your stop loss. The calculator multiplies balance by risk% to get the money at risk, then divides that by your stop distance times the GBP/USD pip value per lot. When your account currency differs from US Dollar (USD), the pip value is converted with live exchange rates before the lot size is worked out.

What is one pip of GBP/USD worth?

One pip of GBP/USD moves the value of a 1.00 lot by $10.00. This is the contract size (100,000 GBP) multiplied by the pip size (0.0001). Because the pair is quoted in US dollars, that pip value is already in dollars.

What is 1 lot of GBP/USD?

A standard 1.00 lot of GBP/USD represents 100,000 GBP. A 0.10 lot is a tenth of that and a 0.01 lot (a micro lot) is a hundredth. Brokers can define contract sizes differently, so confirm the specification in your MT4/MT5 symbol details before sizing a live trade.

Why does the calculator show an exact size and a broker-ready size?

The exact size is the pure mathematical answer, for example 0.0167 lots. Most brokers only accept volumes on a grid set by a minimum lot and lot step (often 0.01), so the broker-ready size is the largest valid volume at or below the exact size. It never rounds up, so your actual risk on GBP/USD never exceeds the risk you set.

Does the GBP/USD lot size depend on my account currency?

GBP/USD is quoted in US dollars, so a USD account needs no conversion. For any other account currency, the calculator converts the pip value with live rates, which can make the same trade look slightly larger or smaller.
Read the full guide & FAQ
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