Risk and position
Position Size Calculator
Translate a predefined account-risk limit and stop distance into an estimated position size before considering an order.
How the calculator works
risk amount = account balance × risk %
position size = risk amount ÷ stop distance
The calculation converts the selected account risk into an amount, then relates that amount to the price distance from entry to stop. Instrument units and contract conventions still need to be checked.
Fees, funding, spread, slippage, contract specifications and venue rules can change the realised result. Recheck those details before placing an order.
Inputs to check before calculating
Inputs
- Account balance or the capital base used for the plan.
- Maximum risk amount or percentage for the trade.
- Entry price and stop-loss price.
- Instrument unit, contract size and applicable fees.
- Enter values from the instrument and account you are evaluating.
- Run the calculation and check its units and assumptions.
- Compare the estimate with the venue contract, fees and risk rules.
Result: A planning estimate based only on the entered assumptions, not a trade recommendation.
Frequently asked questions
Why does stop distance change position size?
With the same risk budget, a wider stop generally requires a smaller position, while a narrower stop allows a larger calculated position.
Does the calculator place or recommend a trade?
No. It performs a planning calculation from the values you enter. It does not connect to an account, execute an order or provide personalised advice.
Calculator results are estimates for planning and education. Verify contract specifications, fees and rules with your broker or exchange.
Updated: · Midas Team
