Position Size Calculator

Enter what you are willing to lose and where the idea is wrong. The lot size is arithmetic from there — and this shows you which limit is actually setting it.

Your account

Account currency

Balance

Risk per trade

Risk %

≈ —

The trade

Instrument

Stop distance — pips

The distance from entry to the price that says the idea was wrong.

Conversion rate — 1 USD in GBP

This tool never fetches prices, so enter today's rate. Set it to 1 if the instrument is already priced in your account currency.

Broker limits — optional

Leverage 1:

Max margin used

% of balance

Min lot

Lot step

Current price — for the margin check only

Position size

—

lots

You risk—

Stop distance—

Value per pip, per lot—

Loss if stopped—

Margin required—

Fill in the fields to see your size.

Educational and analytical tools only. Not financial advice. No product places, manages or recommends trades. Trading carries risk of loss; past results are not a forecast. This calculator is arithmetic on the numbers you enter — it does not know your broker's exact contract specification, and it is not a quotation service. Always confirm the size against your own platform before placing anything.

This is the free version. It works on the numbers you type in. The AXIOM Trader's Desk does the same maths live against your own MetaTrader 5 account — real spreads, real ATR, your broker's actual contract sizes and margin, across every instrument at once.