Contribution Margin Calculator
Enter your price and variable cost per unit and the units sold to find the total contribution margin and its ratio. Add fixed costs to see the profit.
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Contribution Margin Calculator
Our Contribution Margin Calculator shows how much of your sales is left after variable costs to pay the fixed costs and then turn a profit. Enter the selling price per unit, the variable cost per unit and the units sold to get the total contribution margin, the contribution per unit and the contribution margin ratio. Add your fixed costs to see the profit and the break-even point too.
Quick answer
Contribution margin is (price per unit − variable cost per unit) × units sold: ($150 − $90) × 1,000 = $60,000.
- Per unit: price − variable cost ($60)
- Ratio: contribution ÷ price ($60 ÷ $150 = 40%)
- Profit: total contribution − fixed costs
- Break-even: fixed costs ÷ contribution per unit
What Is Contribution Margin?
Contribution margin is the money from sales that remains after paying the costs that rise with every unit sold. It is what each sale contributes toward the fixed costs of the business, and once those are covered, toward profit.
- Variable costs rise with every unit: materials, packaging, shipping, card fees, sales commission.
- Fixed costs stay the same whatever you sell: rent, salaries, insurance, software subscriptions.
Contribution margin can be shown three ways: per unit, as a total for all units sold, or as a ratio (a percentage of sales). The calculator gives all three.
How to Calculate Contribution Margin
- P: selling price per unit
- V: variable cost per unit
- Q: units sold in the period
- F: total fixed costs for the same period
- Find the contribution per unit. $150 price − $90 variable cost = $60.
- Multiply by the units sold. $60 × 1,000 = $60,000 total contribution margin.
- Divide by the price for the ratio. $60 ÷ $150 = 0.40, or 40% of every sale.
- Subtract the fixed costs for profit. $60,000 − $25,000 = $35,000.
Where Each Sale Goes
Selling 1,000 units at $150 brings in $150,000. Variable costs of $90 a unit take $90,000, leaving a $60,000 contribution margin. That pays the $25,000 of fixed costs, and the remaining $35,000 is profit.
Contribution Margin Examples
| P, V, units | Total CM | Ratio |
|---|---|---|
| $5, $1.50, 1,000 | $3,500 | 70% |
| $25, $10, 400 | $6,000 | 60% |
| $150, $90, 1,000 | $60,000 | 40% |
| $40, $28, 2,500 | $30,000 | 30% |
A high ratio means most of each sale is left for fixed costs and profit, so profit grows quickly once fixed costs are covered. A low ratio needs much more sales volume to reach the same profit.
Contribution Margin vs Gross Margin
Both start from sales, but they take off different costs. Gross margin subtracts the cost of goods sold, which can include fixed factory overhead. Contribution margin subtracts every variable cost, including variable selling costs such as commission, and no fixed costs.
| Per unit ($150 price) | Amount |
|---|---|
| Cost of goods sold $80 | Gross profit $70 |
| Plus commission $10 | Contribution $60 |
Use gross margin for financial statements and contribution margin for decisions about price, volume and which products to push.
Contribution Margin and Break-Even
With $25,000 of fixed costs and a $60 contribution per unit, the break-even point is $25,000 ÷ $60 = 416.67, so 417 units must be sold. In sales, that is $25,000 ÷ 0.40 = $62,500. Selling 1,000 units leaves a margin of safety of 583.33 units, or 58.33% of sales. For more, use the Break-Even Calculator.
Common Mistakes
- Leaving out variable selling costs. Shipping, card fees and commission are variable costs too.
- Counting fixed costs per unit. Rent spread over units is not a variable cost; it stays the same if you sell fewer.
- Mismatched periods. Use the units and fixed costs of the same month, quarter or year.
- Confusing it with gross margin. The two differ whenever there are variable selling costs or fixed production costs.
Key Terms
- Unit CM
- Price − variable cost per unit.
- Total CM
- Unit CM × units sold.
- CM ratio
- Contribution ÷ price, as a percentage.
- VC ratio
- Variable cost ÷ price; with the CM ratio it adds to 100%.
- Op. leverage
- Total CM ÷ profit: $60,000 ÷ $35,000 ≈ 1.71, so 10% more sales gives about 17.1% more profit.
How to Use the Contribution Margin Calculator
- Enter the price and variable cost per unit. Type the selling price of one unit, such as 150, and what each unit costs to make and sell, such as 90. Commas and a currency sign are fine.
- Enter the units sold and, if you like, the fixed costs. Type the number of units sold in the period, such as 1,000. Add the fixed costs for the same period, such as 25,000, to also see the profit and the break-even point.
- Read and copy the result. The total contribution margin appears as you type, with the working, the contribution per unit, the contribution margin ratio and the sales revenue. Press Copy to copy it, or Clear or Esc to start again.
Example: a coffee shop sells iced lattes for $5, spends $1.50 on each one and sells 1,000 a month with $2,000 of monthly fixed costs. Enter 5, 1.50, 1000 and 2000. The contribution margin is $3,500 (a 70% ratio), the profit is $1,500 and the break-even point is 572 lattes.
Who Can Use This Calculator?
Frequently Asked Questions (FAQs)
How do you calculate contribution margin?
Subtract the variable cost per unit from the price, then multiply by the units sold: CM = (P − V) × Q. With a $150 price, a $90 variable cost and 1,000 units, the contribution margin is $60 per unit and $60,000 in total.
What is the contribution margin ratio?
It is the contribution margin as a share of sales: (P − V) ÷ P, or total contribution margin ÷ sales revenue. $60 ÷ $150 = 40%, so 40 cents of every sales dollar is left to pay fixed costs and earn profit.
How do you get profit from contribution margin?
Subtract the fixed costs from the total contribution margin. $60,000 − $25,000 = $35,000 of profit. If the fixed costs are larger than the contribution margin, the result is a loss.
What is the difference between contribution margin and gross margin?
Gross margin is sales minus the cost of goods sold, which can include fixed production overhead. Contribution margin is sales minus all variable costs, including variable selling costs such as commission, and leaves out every fixed cost.
How does contribution margin give the break-even point?
Divide the fixed costs by the contribution per unit. $25,000 ÷ $60 = 416.67, so 417 units must be sold to cover every cost. For break-even sales, divide the fixed costs by the ratio: $25,000 ÷ 0.40 = $62,500.
Can contribution margin be negative?
Yes. If the variable cost per unit is higher than the price, each sale loses money before any fixed costs are paid, and selling more makes the loss bigger. The price needs to rise or the variable cost needs to fall.
What is a good contribution margin ratio?
It depends on the industry and on the fixed costs. A higher ratio leaves more of each sale for fixed costs and profit, but a business with low fixed costs can do well on a lower ratio. Compare it with similar products and with your own break-even point.
Is the Contribution Margin Calculator free?
Yes. It is completely free, needs no sign-up, and can be used as many times as you like.
Sources
- OpenStax, Principles of Accounting, Volume 2. 3.1 Explain Contribution Margin and Calculate Contribution Margin per Unit, Contribution Margin Ratio, and Total Contribution Margin.
- Corporate Finance Institute. Contribution Margin Ratio: Definition, Formula and Examples.
- Wall Street Prep. Contribution Margin: Formula + Calculator.
- AccountingTools. Contribution margin definition.
Try our Contribution Margin Calculator to see how much each sale adds toward your fixed costs and profit.