USD/JPY Lot Size Calculator

Position size calculator for US Dollar / Japanese Yen

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

Live exchange ratesPre-set to USD/JPYRisk-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 USD/JPY contract details with your broker.

USD/JPY FACTS

USD/JPY contract specification

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

Base / quote
US Dollar (USD) / Japanese Yen (JPY)
Pip size
0.01
Contract size (1.00 lot)
100,000 USD
Pip value per 1.00 lot
1,000.00 JPY
WORKED EXAMPLE

USD/JPY position size example

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

Inputs

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

Risk per lot

30 pips × 1,000.00 JPY per pip

= Risk / 1.00 lot

30,000.00 JPY

Position size

$50.00 risk ÷ 30,000.00 JPY per lot

≈ Lots

0.00167 lots

Note: The risk-per-lot figure is in JPY. With a JPY account that is 0.00167 lots; in any other account currency the calculator converts the JPY pip value to your currency with live rates before sizing.
USD/JPY FAQ

USD/JPY lot size FAQs

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

Enter your account balance and currency, choose USD/JPY, 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 USD/JPY pip value per lot. When your account currency differs from Japanese Yen (JPY), the pip value is converted with live exchange rates before the lot size is worked out.

What is one pip of USD/JPY worth?

One pip of USD/JPY moves the value of a 1.00 lot by 1,000.00 JPY. This is the contract size (100,000 USD) multiplied by the pip size (0.01). Because USD/JPY is quoted in Japanese Yen, that pip value is in JPY; the calculator converts it to your account currency automatically.

What is 1 lot of USD/JPY?

A standard 1.00 lot of USD/JPY represents 100,000 USD. 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 USD/JPY never exceeds the risk you set.

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

Yes. USD/JPY is quoted in Japanese Yen (JPY), so unless your account is in JPY the calculator converts the pip value to your account currency with live exchange rates. Two accounts in different currencies can therefore get slightly different lot sizes for the same trade.
Read the full guide & FAQ
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