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FREE FOREX COMMISSION TOOL

Commission-per-Lot Calculator

Calculate per-side, round-turn, and sample commission from the broker’s per-lot rate, position size, and number of trades.

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CALCULATOR INPUTS

Enter your planning values

CALCULATED OUTPUT

Your planning estimate

Enter or adjust the values, then select Calculate results.

STEP-BY-STEP

How to use this tool

  1. Confirm whether the broker quotes commission per side or round turn; this tool expects a per-side rate.
  2. Enter the standard-lot size used by each trade.
  3. Enter the number of completed round-turn trades.
  4. Add any fixed ticket, platform, or regulatory fee charged per trade.
  5. Enter the sample’s gross profit to measure commission drag.
  6. Compare the estimate with the statement and add spread, slippage, and swap costs separately.
WORKED EXAMPLE

See the calculation in context

A $3.50 per-lot-per-side commission on one standard lot costs $3.50 to open and $3.50 to close, or $7 round turn. Ten completed trades cost $70 before spread and other fees.

Calculation method

Per-side commission = rate per standard lot per side × lots. Round-turn cost = two sides + fixed fees. Sample commission = round-turn cost × completed trades.

AVOID THESE ERRORS

Common mistakes

  1. Entering a round-turn rate as though it were per side
  2. Forgetting that both entry and exit can be charged
  3. Using contracts or units when the rate is quoted per standard lot
  4. Ignoring minimum ticket commissions
  5. Comparing accounts without including all fixed fees
  6. Measuring strategy performance before deducting commission
FREQUENTLY ASKED

Questions and answers

What if my broker quotes round-turn commission?

Divide the round-turn per-lot amount by two before entering it, unless other fixed fees make that conversion inaccurate.

Does partial closing change commission?

It can. Commission generally follows executed quantity, and minimum fees or multiple tickets may affect the total.

Does this include spread?

No. Spread is a separate execution cost.

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USEFUL NEXT TOOLS

Continue the workflow

FREE TOOLSpread Cost CalculatorEstimate the dollar cost of the bid-ask spread for one forex position and across a repeated trading sample.FREE TOOLCurrency Pair Profit CalculatorEstimate forex profit or loss from direction, entry, exit, position size, pip size, pip value, and trading costs.FREE TOOLForex Pip Value CalculatorCalculate the estimated pip value for a forex position using the pair price, lot size, contract size, pip size, and an optional quote-to-account currency conversion rate.
Educational-use notice.

Outputs are planning estimates, not investment advice or guarantees. Verify instrument specifications, fees, prices and binding prop-firm rules with the relevant official source before relying on any result.