Lot size calculator
Enter your account balance, a loss percentage for the calculation, the stop-loss distance in pips and the pip value per lot in your account currency. The tool calculates a loss budget and an estimated lot size using those assumptions.
It is a calculator, not advice. It does not tell you how much to risk or whether to trade, and it does not limit your actual loss. The calculation runs in your browser and your inputs are not sent anywhere.
How does the tool get to a lot size?
It takes the loss you accept (balance x percentage / 100) and divides it by the stop distance in pips times the value of one pip per lot, then rounds down to 0.01 lot. The result is an estimate, not a recommendation.
How the calculation works
- Loss you accept = balance x percentage / 100.
- Lot size = loss you accept / (stop distance in pips x value of 1 pip per 1 lot), rounded down to the 0.01 place.
If the result is below 0.01 it is shown as 0.00 and is not rounded up.
Illustration with round numbers (not a suggested level of risk). With a balance of 10,000, a loss of 1%, a stop distance of 20 pips and a pip value of 10, the loss you accept is 100 and the lot size is 100 / (20 x 10) = 0.50.
What the default pip value assumes
For most forex pairs, 1 lot is 100,000 units of the base currency and 1 pip is 0.0001. Pairs with the yen use 0.01. Exness defines the value of a pip as lots x contract size x pip size, and it calculates profit and loss in the quote currency before converting it to your account currency. For 1 lot of a pair with a 0.0001 pip this gives 10 in the quote currency, which is why the default is 10.
That default only fits when the quote currency of the pair is also your account currency. Do not use it for anything else, such as a cent account, a pair quoted in yen, metals or an index; enter the pip value per lot in your account currency for your instrument and account type. Source: Common trading terms (checked 2026-10-13).
What the result leaves out
- Spread and commission.
- Slippage, which can make a trade close at a different price from your stop loss.
- Changes in the value of a pip over time.
- Whether your account has enough margin for the position. See the leverage page for how margin works.
- The minimum lot size and the lot step of each instrument.
Minimum lot sizes and lot units
The minimum trading volume differs by instrument. It is 0.01 lot for forex and commodities, but the official lists for cryptocurrencies and indices show minimums that differ by instrument, from 0.01 up to 3 lots. A Standard Cent account counts in cent lots, where 1 cent lot is 0.01 of a standard lot. Check the minimum for your instrument and account type on the platform.
Sources: Exness help center, Forex, Cryptocurrencies and Indices (checked 2026-10-13).
Check your numbers in the official calculator
Exness has its own trading calculator in the Personal Area under the Tools & Services menu and in Exness Trade. Its results use actual market data, but they can differ from live conditions because of currency conversion and spread differences. Its results include the pip value, which you can type into this tool. Source: Trading calculator (checked 2026-10-13).
Why is the lot size rounded down?
Rounding down keeps the calculated loss at or below the entered budget under the supplied stop-distance and pip-value assumptions. Actual losses can be higher. Results below 0.01 lot are shown as 0.00.Is the loss I enter the most I can lose?
No. The tool does not include spread, commission or slippage, so a real trade can lose more than the figure shown. It is an estimate, not a limit.Which pip value should I enter?
The default of 10 assumes one standard lot of 100,000 base-currency units, a pip size of 0.0001, and a quote currency matching your account currency. Do not use this default for cent accounts, JPY-quoted pairs, metals or indices. Enter the pip value per lot in your account currency for your instrument and account type. The official Exness trading calculator can show the pip value for an instrument.Last reviewed 2026-10-13