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Forex Spread Cost Calculator — result sheet
Convert bid and ask prices into spread pips and estimate the account-currency cost of crossing that spread for a position.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: Spread price = ask − bid; spread pips = spread price / pip size; position pip value = lots × units per lot × pip size × quote-to-account rate; cost to cross once = spread pips × position pip value.
The bid-ask spread is an execution gap between two quoted prices. This calculator expresses that gap in pips and currency for the entered position while keeping a two-spread comparison separate from the one-cross cost.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Position size — lots; minimum 1.0E-6; maximum 1000000
- Base units per lot — base units / lot; minimum 1.0E-6; maximum 1000000000
- Pip size — quote price units / pip; minimum 1.0E-8; maximum 1
- Bid price — quote / base; minimum 1.0E-8; maximum 1000000000
- Ask price — quote / base; minimum 1.0E-8; maximum 1000000000
- Quote currency to account currency — account / quote; minimum 1.0E-10; maximum 1000000000
Worked example
| Input | Value |
|---|---|
| Position size | 1 |
| Base units per lot | 100000 |
| Pip size | 0.0001 |
| Bid price | 1.0849 |
| Ask price | 1.0851 |
| Quote currency to account currency | 1 |
The quoted spread is 0.0002, or 2 pips; at 1 lot the position pip value is 10, crossing once costs 20 account-currency units, and two crossings represent 40.
Assumptions and limits
- Bid and ask use the same price quotation and decimal precision.
- Ask is greater than or equal to bid for the scenario.
- The entered pip size matches the instrument convention.
- The position remains at the entered lot size while the spread is crossed.
- The quote-to-account rate is constant for this estimate.
- Crossing once means paying the displayed gap for one execution direction.
- The doubled line represents two spread crossings, not a guaranteed round-trip quote.
- Commission, slippage, swaps, financing, and taxes are excluded.
- Actual spreads can widen during news, illiquidity, or volatile markets.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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