USDJPY lot size calculator
A standard USDJPY lot is 100,000 units, quoted to 3 decimals, and one pip of 0.01 moves 1,000 JPY per lot. Feed the calculator your account size, the percentage you are willing to lose and the distance to your stop, and it returns the size that puts exactly that much at risk — rounded down to your broker's lot step so the real risk never comes out above the target.
What makes USDJPY different
The yen quotes to two decimals instead of four, so a pip here is 0.01, not 0.0001. That trips up traders who assume every pair moves the same way. The second catch is that a pip is worth 1 000 JPY per standard lot, and a dollar account has to convert that back — dividing by the USDJPY price itself. That is why the pip value drifts as the pair moves, and why this calculator takes the rate from the entry price you type instead of an external feed.
Contract specification
| Symbol | USDJPY |
|---|---|
| Contract size (1 lot) | 100,000 |
| Quote currency | JPY |
| Quoted decimals | 3 |
| Pip / point size | 0.01 |
| Pip value per standard lot | 1,000 JPY |
USDJPY pip value by lot size
Values in JPY, the currency USDJPY is quoted in. A pip here is 0.01.
| Lot size | Units | Value of 1 pip |
|---|---|---|
| Standard (1.00) | 100,000 | 1,000 JPY |
| Mini (0.10) | 10,000 | 100 JPY |
| Micro (0.01) | 1,000 | 10 JPY |
A worked example
- Risk in money: a 10 000 JPY account risking 1% puts 100 JPY on the line.
- Stop distance in price: 20 pips × 0.01 = 0.2.
- Loss per lot: 0.2 × 100,000 = 20,000 JPY.
- Lot size: 100 ÷ 20,000 = 0.005, rounded down to 0.
The example assumes an account in JPY. If yours is in another currency, every figure above gets multiplied by the rate from JPY to your currency, which the calculator applies automatically.
Lot size for a 10 000 JPY account
What each combination of risk and stop distance works out to. Read it as a sanity check on the number the calculator gives you.
| Risk | 10 pips | 20 pips | 40 pips | 80 pips |
|---|---|---|---|---|
| 0.5 % | — | — | — | — |
| 1 % | 0.01 | — | — | — |
| 2 % | 0.02 | 0.01 | — | — |
| 3 % | 0.03 | 0.01 | — | — |
Frequently asked questions
How much is one pip worth on USDJPY?
On a standard lot of 100,000 units, one pip of 0.01 is worth 1,000 JPY. A mini lot is a tenth of that and a micro lot a hundredth. If your account is not in JPY, multiply by the current rate from JPY to your account currency.
What lot size should I use on USDJPY?
There is no single right size: it depends on how much you are willing to lose and where your stop sits. Decide the loss first — most traders cap it at 1% to 2% of the account per trade — then divide that amount by the loss per lot at your stop distance. The calculator above does exactly that and rounds down to your broker's step.
Why does my broker show a different USDJPY lot size?
Almost always because the contract or the pip definition differs. Open your platform's contract specification for USDJPY, compare the contract size against 100,000 and the tick against 0.01, and correct them under "broker settings" above. The second cause is the conversion rate when your account currency is not JPY; you can override that too.
I have a dollar account — does that change the USDJPY calculation?
Yes. USDJPY settles in JPY, so the loss per lot has to be converted from JPY into dollars at the current rate. The calculator does it automatically and tells you which rate it used, and you can type your broker's own rate if you want the figure to match your platform to the cent.
Educational tool. Check the size in your platform before trading; leveraged trading carries a risk of loss.