Break-Even Calculator - Units and Revenue to Cover Costs

Enter fixed costs, price per unit, and variable cost per unit to find your break-even point, contribution margin, and profit at any sales volume. Free, instant, and browser-based.

Break-even units

334

exact: 333.3

Break-even revenue

8,333.33

Contribution margin

15.00

60.0% of price

Profit at 500 units: 2,500.00

Indication only, not financial advice. Real cost structures shift with volume.

Profit at multiples of break-even volume

VolumeUnitsRevenueProfit
0.5x break-even1674,175.00-2,495.00
1x break-even3338,325.00-5.00
1.5x break-even50012,500.002,500.00
2x break-even66716,675.005,005.00

Understanding Break-Even Analysis

The break-even point is where total revenue equals total costs. The formula is simple: break-even units = fixed costs divided by the contribution margin, where contribution margin is price per unit minus variable cost per unit. With 5,000 in monthly fixed costs, a 25 price, and 10 variable cost, each sale contributes 15 toward fixed costs, so you break even at 334 units (5,000 / 15 = 333.3, rounded up because you cannot sell a third of a unit) and 8,333 in revenue.

Contribution margin is the number to watch. Above break-even, every additional unit adds its full margin straight to profit, which is why the table shows that doubling break-even volume yields a profit exactly equal to your fixed costs. The margin ratio (margin as a share of price, 60% in the example) also tells you break-even revenue directly: fixed costs divided by the ratio. A business with a 20% margin ratio must sell three times as much revenue as one with 60% to cover the same overhead.

The custom volume field turns the analysis into a planning tool: enter your realistic monthly sales forecast and see the profit or loss at that level. If your forecast sits below break-even, you have three levers, and the calculator lets you test each in seconds: raise the price, cut the variable cost per unit, or reduce fixed costs. A 10% price increase often moves break-even far more than a 10% volume increase, because it flows entirely into the margin.

The model assumes linear costs: fixed costs stay flat and variable cost per unit is constant at any volume. Reality bends those lines with volume discounts, overtime, capacity steps, and stepped rent, so treat the result as an indication rather than financial advice. For pricing the unit itself, the Discount Calculator shows what promotions do to your margin, and the Invoice Generator handles billing once the sales arrive.

How the Break-Even Calculator Works

  1. 01Enter your fixed costs for the period, such as rent, salaries, and software.
  2. 02Enter the selling price per unit and the variable cost per unit.
  3. 03The tool computes contribution margin, break-even units, and break-even revenue.
  4. 04Test any sales volume and scan the profit table at 0.5x to 2x break-even.

Running a Quick Break-Even Analysis

Split your costs honestly: fixed costs stay the same whether you sell 10 units or 1,000 (rent, insurance, salaries), while variable costs scale with each unit (materials, payment fees, shipping). The contribution margin, price minus variable cost, is what each sale contributes to covering the fixed block. Break-even is simply fixed costs divided by that margin; everything beyond it drops the full margin to profit.

When to Use a Break-Even Calculator

Use it before launching a product, when setting or changing a price, when evaluating a cost increase from a supplier, or when deciding whether a discount campaign can pay for itself in volume. It turns 'can this work?' into a concrete unit count you can compare against a realistic sales forecast.

Common Use Cases

Tips

  • Include payment processing fees in the variable cost, not in fixed costs.
  • Round break-even units up; you cannot sell a fraction of a unit.
  • Re-run the numbers whenever a supplier changes prices; small margin shifts move break-even a lot.

Frequently Asked Questions

What is the break-even formula?→
Break-even units = fixed costs / (price per unit - variable cost per unit). With 5,000 fixed costs, a 25 price, and 10 variable cost, that is 5,000 / 15 = 334 units (rounded up), or 8,333 in revenue. The denominator is called the contribution margin.
What is a contribution margin ratio?→
The margin as a share of price: (price - variable cost) / price. A 25 price with 10 variable cost gives 60%. It converts directly to break-even revenue: fixed costs divided by the ratio. Software businesses often run 80%+; retail commonly sits between 20 and 50%.
Why does doubling break-even volume yield a profit equal to fixed costs?→
At break-even, the total contribution exactly covers fixed costs. Doubling the volume doubles the total contribution, and the second half is pure profit, so profit at 2x break-even equals your fixed costs. The multiples table makes that visible for your numbers.
Which lever moves break-even most: price, variable cost, or volume?→
Usually price, because every extra unit of price flows entirely into the margin. Raising the example price 10% (to 27.50) cuts break-even from 334 to 286 units, a 14% drop. Cutting variable cost by the same absolute amount has an identical effect; volume does not change break-even at all, only how far above it you are.
What are the limits of this model?→
It assumes linear costs and a single product. Real businesses hit capacity steps (a second machine, more staff), volume discounts on inputs, and product mixes with different margins. Use it for direction and rough sizing, then refine with actual accounting data; it is an indication, not financial advice.

Related tools

12 suggested