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Break‑Even Calculator

Instantly calculate your break‑even point, target profit units, and margin of safety.

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What is the Break‑Even Calculator?

Instantly find how many units you need to sell to cover all costs – and then start making profit. The Break‑Even Calculator uses your fixed costs, variable cost per unit, and selling price to give you the exact break‑even point in both units and revenue.

Need to plan for a target profit? Add a desired profit amount to see how many extra sales are required. Already have a sales forecast? Enter your expected sales volume and instantly see your margin of safety – how far your sales can drop before you hit the red.

Ideal for entrepreneurs, small business owners, and students, this calculator eliminates manual number crunching and helps you make confident pricing and cost decisions.
No spreadsheets, no guesswork – just clear, immediate results.

How it works

1. Core formula

The break‑even point is where total revenue = total costs (no profit, no loss).

Break‑Even Units = Fixed Costs ÷ (Selling Price per Unit − Variable Cost per Unit)

  • Fixed costs – expenses that don’t change with production (rent, salaries, insurance).
  • Variable cost per unit – cost that increases with each unit produced/sold (materials, direct labor).
  • Selling price – price charged to the customer for one unit.

The difference (Selling Price − Variable Cost) is called the contribution margin.
Every unit sold contributes that amount toward covering fixed costs. Once fixed costs are fully covered, any remaining margin becomes profit.

2. Break‑even revenue

Break‑Even Revenue = Break‑Even Units × Selling Price
Tells you the sales dollar amount needed to reach the break‑even point.

3. Target profit analysis (optional)

When you add a target profit, the formula becomes:

Target Units = (Fixed Costs + Target Profit) ÷ Contribution Margin
Target Revenue = Target Units × Selling Price

4. Margin of safety (optional)

If you provide an expected sales volume, the calculator shows:

Margin of Safety (units) = Expected Sales − Break‑Even Units
Margin of Safety (%) = (Margin of Safety ÷ Expected Sales) × 100

A higher margin of safety means your business can withstand a drop in sales before losing money.

Examples

Coffee shop break‑even

Fixed costs 5,000,variable5,000, variable2 per cup, selling price $5

Fixed costs: 5000 · Variable cost: 2 · Selling price: 5
 
Break‑even: 1,667 units ($8,333) · Margin: $3/unit

Target profit planning

Add $10,000 desired profit

Fixed: 5000 · Variable: 2 · Price: 5 · Target profit: 10000
 
Need 5,000 units ($25,000) to hit the profit goal

Margin of safety check

Compare expected sales to break‑even

Fixed: 5000 · Variable: 2 · Price: 5 · Expected sales: 3000
 
Safety: 1,333 units (44.4%) above break‑even

Frequently asked questions

What is a break‑even point?

The break‑even point is the number of units you must sell so that total revenue exactly covers total costs (both fixed and variable). At this point your business is neither making a profit nor a loss.

How do I calculate break‑even manually?

Use the formula: Break‑even units = Fixed Costs ÷ (Selling Price – Variable Cost per Unit). You need three numbers: fixed costs, variable cost per unit, and selling price. Our calculator does this instantly and also handles target profit and margin of safety.

Why does the selling price have to be greater than variable cost?

If your selling price is less than or equal to your variable cost per unit, every sale loses money. You can never cover fixed costs, so break‑even is impossible. The calculator will show an error in this situation.

What is the contribution margin?

Contribution margin = Selling Price per Unit – Variable Cost per Unit. It’s the amount each unit contributes toward paying off fixed costs. After fixed costs are covered, this margin becomes your profit per unit.

Can I use this calculator for a service business?

Yes. Think of “units” as billable hours, projects, or service packages. Fixed costs might be monthly overhead, variable costs could be contractor fees or materials per job, and selling price is your service fee.

What does “margin of safety” mean?

Margin of safety shows how much sales can drop before you reach the break‑even point. It’s a buffer. A larger margin (in units or percentage) means lower risk of losing money.

How is target profit handled?

If you want a specific profit (on top of covering all costs), add it to the fixed costs in the break‑even formula. The calculator then tells you how many units you must sell to achieve that profit.

Are the results rounded?

The calculator shows results with up to two decimal places for precision, because units can be fractional in planning (e.g., 1,666.67 units). Revenue is formatted as currency with two decimals.

Is my data stored or sent anywhere?

No. All calculations run directly in your browser. We never send your inputs to any server, and we don’t store any personal data.

Why is my break‑even unit number not a whole number?

Because fixed costs divided by the contribution margin rarely results in an exact integer. In business planning, partial units represent a point where total costs and revenue are equal – you can interpret it as the exact break‑even value.

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