Contribution margin calculator
What is left of the price after variable costs.
Fill in the fields and the result will appear here automatically.
Unit contribution is what remains from the selling price after the entered variable cost. It helps cover fixed costs before a profit can arise. The percentage describes contribution relative to price; the amount and sales volume describe the monetary contribution. This form assumes an unchanged unit price and unit variable cost throughout the supplied volume.
How it works
Formula and logic
Unit contribution M = P − V, where P is unit price and V is unit variable cost. Contribution percentage = 100 × M / P. For positive volume Q, total contribution is M × Q. Price is positive; cost and volume are nonnegative. Cost above price is valid and produces negative contribution. Intermediate values are unrounded. Ordinary monetary results use whole units and very small values retain scientific notation.
Example
Price 500 and variable cost 300 give unit contribution 200 and 40%. Selling 10 units contributes 2,000. Cost equal to 500 gives zero contribution and 0%. At cost 650, contribution is −150 and −30%. A measured volume of 2.5 with unit contribution 200 contributes 500.
Fields and units
- Price per unit — monetary units/item
- Variable cost per unit — monetary units/item
- Volume, units — unitless
How to use
- — Choose the unit being sold and enter a positive selling price for it.
- — Enter nonnegative variable cost for that same unit in the same currency.
- — Volume is optional: blank or zero hides the total-volume result. Fractions are valid for measured quantities such as kilograms or hours.
- — Classify costs for the period and activity range you are assessing; incorporate discounts, taxes and any chosen costs consistently in the input amounts.
Method and limitations
- Calculation method
- Formula and logic
- Data or methodology source
- ACCA: contribution margin and the relevant-range limits of CVP analysis
- Limitation
- Single-item linear model with constant unit price and variable cost. Net profit, taxes and capacity use are not calculated. All monetary inputs share one currency; the displayed currency symbol does not perform an exchange conversion.
FAQ
Which expenses are variable for my chosen unit?
Use expenses that change with selling that unit within the relevant activity range. Materials, packaging or a sales commission may qualify. Wages, delivery and rent need classification by their actual contracts and time horizon.
Should percentage replace the monetary contribution?
No. Percentage compares contribution with price; the monetary amount describes one unit’s contribution, and the volume total describes the aggregate. Demand and fixed costs remain important in all three interpretations.
Why allow cost above price but reject negative cost?
A positive cost above the price describes a sale with negative contribution and is shown explicitly. Negative cost contradicts this form’s nonnegative-cost domain; rebates or subsidies need a consistent separate treatment.
Is contribution the same as gross or net profit?
Gross profit follows the costs included in cost of sales, which may include fixed production costs. This calculation subtracts the entered variable costs only. Net profit also requires fixed and other expenses.
Does positive contribution justify taking another order?
Not by itself. Capacity, the opportunity cost of another sale and additional fixed or step costs may matter. Unit price and unit variable cost may also change outside the activity range assumed here.