JPN225 lot size calculator
A standard JPN225 lot is 1 contract, quoted to 2 decimals, and one point of 1 moves 1 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 JPN225 different
The Nikkei quotes in yen and trades in the thousands of points, a combination that produces odd-looking numbers: a 100 point stop is a small move here, and the yen conversion shrinks the per-point value to a fraction of a dollar. Check whether your broker prices it in yen or in dollars, because both versions exist and they size completely differently.
Contract specification
| Symbol | JPN225 |
|---|---|
| Contract size (1 lot) | 1 |
| Quote currency | JPY |
| Quoted decimals | 2 |
| Pip / point size | 1 |
| Pip value per standard lot | 1 JPY |
JPN225 pip value by lot size
Values in JPY, the currency JPN225 is quoted in. A point here is 1.
| Lot size | Units | Value of 1 point |
|---|---|---|
| Standard (1.00) | 1 | 1 JPY |
| Mini (0.10) | 0.1 | 0.1 JPY |
| Micro (0.01) | 0.01 | 0.01 JPY |
A worked example
- Risk in money: a 10 000 JPY account risking 1% puts 100 JPY on the line.
- Stop distance in price: 100 points × 1 = 100.
- Loss per lot: 100 × 1 = 100 JPY.
- Lot size: 100 ÷ 100 = 1, rounded down to 1.
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 | 50 points | 100 points | 200 points | 400 points |
|---|---|---|---|---|
| 0.5 % | 1 | 0.5 | 0.25 | 0.12 |
| 1 % | 2 | 1 | 0.5 | 0.25 |
| 2 % | 4 | 2 | 1 | 0.5 |
| 3 % | 6 | 3 | 1.5 | 0.75 |
Frequently asked questions
How much is one point worth on JPN225?
On a standard lot of 1 contract, one point of 1 is worth 1 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 JPN225?
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 JPN225 lot size?
Almost always because the contract or the point definition differs. Open your platform's contract specification for JPN225, compare the contract size against 1 and the tick against 1, 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.
What contract size does JPN225 use?
This page assumes 1 JPY per point per lot, which is the most common setup, but it is not universal — $5, $10 and $25 contracts all exist. Check yours once in the contract specification and save it as a template; getting this wrong scales every size you calculate by the same factor.
I have a dollar account — does that change the JPN225 calculation?
Yes. JPN225 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.