Break-Even Calculator

What Is a Break-Even Calculator?

A break-even calculator estimates how many units a business must sell, and how much revenue it must earn, to cover all of its costs. You enter the fixed costs for a period, the selling price per unit, and the variable cost per unit. The calculator returns break-even units, break-even revenue, and the contribution margin. It can also work out the sales volume needed to reach an optional target profit.

It is useful for small business owners, freelancers, retailers, and anyone pricing a product or service. Instead of guessing whether a price covers costs, you can see the sales volume at which the business stops losing money.

What Is the Break-Even Point?

The break-even point is the level of sales at which total revenue equals total costs. Below it, the business makes a loss. Above it, each additional unit adds to profit. At the break-even point itself, profit is zero under the model's assumptions.

Break-even analysis assumes a constant selling price and a constant variable cost per unit, with fixed costs unchanged over the period. Within those assumptions, the break-even point shows the minimum sales volume that keeps the business from losing money on the costs you entered.

How to Use This Break-Even Calculator

• Fixed Costs per Period: costs that do not change with units sold, such as rent, salaries, or insurance. Use the same period (a month, a quarter, a year) that you use for expected sales.
• Selling Price per Unit: the amount you receive for one unit. It must be greater than zero.
• Variable Cost per Unit: the cost that rises with each unit, such as materials, packaging, or per-unit production costs.
• Target Profit per Period (optional): the profit you want after covering all costs. Leave it at 0 for a plain break-even. It does not change the break-even result.
• Currency format: changes the symbol and number formatting only. Nothing is converted.
• Results: break-even units is the headline figure. The supporting cards show break-even revenue, contribution margin, contribution margin ratio, fixed costs, and target-profit units. The chart plots revenue and total costs from your inputs.

Results update as you type. Reset restores the example values.

Break-Even Formula

The calculation starts with the contribution margin per unit, which is the selling price minus the variable cost. Dividing that margin by the selling price gives the contribution margin ratio. Fixed costs divided by the margin per unit give break-even units, and fixed costs divided by the ratio give break-even revenue. Adding the target profit to fixed costs before dividing gives target-profit units. The formula panel above lists each one.

Break-even units can be fractional. Physical products cannot be sold in parts, so the practical requirement is the exact figure rounded up to the next whole unit. If the exact answer is 12.4 units, you need to sell 13 units to meet or exceed break-even. This calculator shows both the exact and the whole-unit figures.

Break-Even Calculation Example

Take fixed costs of 5,000, a selling price of 50, and a variable cost of 30. The contribution margin is 50 − 30 = 20 per unit. Break-even units are 5,000 ÷ 20 = 250. The contribution margin ratio is 20 ÷ 50 = 40%, so break-even revenue is 5,000 ÷ 0.40 = 12,500.

You can check it directly. At 250 units, revenue is 250 × 50 = 12,500. Total costs are 5,000 + (250 × 30) = 12,500. Revenue equals total costs, so profit is zero, before any costs you did not enter.

Fixed Costs vs. Variable Costs

Fixed costs stay the same over the period regardless of how many units you sell. Typical examples are rent, salaried staff, insurance, and software subscriptions. Variable costs change with each unit, such as materials, packaging, shipping per order, or payment fees charged per sale.

Some costs are mixed, or semi-variable. A utility bill may have a standing charge plus a usage charge, and a sales team may earn a base salary plus commission. For a useful estimate, split these into their parts: put the standing amount in fixed costs and the per-unit amount in variable cost per unit. Also match the period. Monthly fixed costs should be paired with monthly sales volume.

What Is Contribution Margin?

Contribution margin is what remains from each unit's selling price after its variable cost is deducted. It is the amount each sale contributes toward fixed costs first, and toward profit once fixed costs are covered. In the example, each unit contributes 20, so the first 250 units cover the 5,000 of fixed costs and every unit after that adds 20 of profit.

The contribution margin ratio expresses the same idea as a share of the price. A 40% ratio means 40% of each sale is available to cover fixed costs and profit. A low or negative margin is the usual reason a break-even point is far away or cannot be reached at all.

How to Calculate Break-Even Sales for a Target Profit

A target profit works like an extra fixed cost that the business must also cover. The formula is Target Profit Units = (Fixed Costs + Target Profit) ÷ Contribution Margin per Unit. With the example numbers and a target of 2,000, (5,000 + 2,000) ÷ 20 = 350 units. At 350 units, revenue is 17,500, variable costs are 10,500, fixed costs are 5,000, and profit is 2,000.

Setting the target profit to zero returns the ordinary break-even units, so the two results always agree. The target is a separate figure and never changes the break-even point.

Limitations of Break-Even Analysis

The model assumes a consistent selling price, a constant variable cost per unit, and fixed costs that stay unchanged over the period. Real businesses face discounts, supplier price changes, waste, returns, payment fees, capacity limits, and fixed costs that step up as the business grows. The calculator also excludes any cost you do not enter, such as taxes or owner pay.

A business that sells several products with different margins cannot rely on a single-product formula. It needs a sales-mix-weighted average contribution margin, which depends on assumptions about how sales are split. Reaching break-even also does not show that a business is financially healthy. It means only that the costs entered are covered. Treat the results as estimates and revisit them when prices or costs change.

Frequently Asked Questions

What is a break-even calculator?

A break-even calculator estimates how many units a business must sell, and how much revenue it needs, to cover its fixed and variable costs. This Break-Even Calculator uses fixed costs, selling price per unit, and variable cost per unit, and can also estimate the units needed for a target profit.

How do you calculate the break-even point?

Subtract the variable cost per unit from the selling price to get the contribution margin per unit, then divide fixed costs by that margin. With fixed costs of 5,000, a price of 50, and a variable cost of 30, the break-even point is 5,000 ÷ 20 = 250 units.

What is the break-even formula?

Break-Even Units = Fixed Costs ÷ Contribution Margin per Unit, where Contribution Margin per Unit = Selling Price per Unit − Variable Cost per Unit. Break-Even Revenue = Fixed Costs ÷ Contribution Margin Ratio.

What is the difference between break-even units and break-even revenue?

Break-even units is the number of units you must sell to cover costs. Break-even revenue is the sales income at that point. In the example, 250 units correspond to 12,500 of revenue. If the exact unit figure is fractional, you need to sell the next whole unit to meet or exceed break-even.

What are fixed costs and variable costs?

Fixed costs stay the same over the period regardless of how many units are sold, such as rent or insurance. Variable costs change with each unit sold, such as materials or packaging. Mixed costs should be split into fixed and variable parts.

What is contribution margin?

Contribution margin is the selling price per unit minus the variable cost per unit. It is the amount each sale contributes toward covering fixed costs and then toward profit. As a ratio, it is the margin divided by the selling price.

How do I calculate break-even for a target profit?

Add the target profit to fixed costs and divide by the contribution margin per unit. With a 2,000 target and the example figures, (5,000 + 2,000) ÷ 20 = 350 units, which gives 17,500 of revenue.

What happens if the selling price equals the variable cost?

The contribution margin is zero, so each sale adds nothing toward fixed costs. With positive fixed costs, no sales volume can reach break-even, and a positive target profit is also unreachable. The calculator shows an explanation instead of a quantity. Increase the price or reduce the variable cost.

Can break-even analysis be used for services?

Yes. Define a consistent unit of service, such as a billable hour or a service package, then enter the price per unit and the variable cost of delivering it. Fixed costs are the costs that do not change with the number of units delivered. If work varies a lot, choose the unit carefully and treat the result as an estimate.

Is break-even analysis accurate for every business?

No. It is an estimate based on stated assumptions, including constant prices and costs over the period. Discounts, changing costs, product mix, capacity limits, and excluded costs can all change the real outcome. Reaching break-even does not guarantee that a business is financially healthy.