What Is Break Even Point?
The break even point is where total revenue equals the costs included in your model. Sales above that point generate profit when each unit contributes a positive amount toward fixed costs.
This calculator models one product or representative unit. It separates fixed costs for a period from the variable costs of each unit sold. The result is a planning estimate based on those assumptions.
Break Even Formula
Contribution Margin Per Unit = Selling Price Per Unit − Variable Cost Per Unit
Break Even Units = Fixed Costs / Contribution Margin Per Unit
Break Even Revenue = Break Even Units × Selling Price Per Unit
Contribution margin is the amount from each sale available to cover fixed costs. Once those costs are covered, additional contribution becomes profit in this model. Profit Per Unit in the result cards uses this contribution definition.
The units formula gives a usable positive sales target only when contribution margin is positive. With positive fixed costs and a zero or negative contribution margin, no nonnegative sales volume covers the modeled costs.
How To Calculate Break Even Point
- Choose a period. Add the fixed costs for that period without mixing monthly and annual figures.
- Enter the unit price. Use the selling price applicable to the modeled sales.
- Enter variable cost per unit. Include costs that vary with each sale, using the same unit basis.
- Subtract variable cost from price. This is contribution margin per unit.
- Divide fixed costs by contribution. Multiply that quantity by unit price to find theoretical break even revenue.
- Round up if products are indivisible. Use the whole-unit target in the result note and check capacity against that target.
Displayed formula results use two decimal places. Revenue is calculated from the unrounded quantity, not the displayed rounded units.
Business Example
Consider an illustrative shop with $10,000 in monthly fixed costs, a $50 selling price per unit, and a $30 variable cost per unit.
- Contribution margin = $50 − $30 = $20 per unit
- Break even units = $10,000 / $20 = 500 units
- Break even revenue = 500 × $50 = $25,000
At 500 units, revenue is $25,000 and costs are $10,000 fixed plus $15,000 variable, also totaling $25,000. At 600 units, modeled profit becomes (600 × $20) − $10,000 = $2,000.
If the formula gives 500.25 units, an indivisible product requires at least 501 units. The main revenue card still shows the theoretical threshold; actual revenue at the whole-unit target is slightly higher.
Why Break Even Analysis Matters
Break even analysis turns cost assumptions into a concrete sales target. It helps a team review whether expected demand and production capacity are sufficient to cover costs.
Changing price, variable cost, or fixed costs changes the threshold. Use consistent assumptions when comparing scenarios. The calculation does not forecast customer demand, account for changing sales mixes, or establish when cash is collected and paid.
Common Mistakes
- Confusing contribution with net profit. Each unit must help cover fixed costs before the modeled business earns profit.
- Mixing cost periods. Monthly sales targets need fixed costs for the matching month.
- Using total variable cost as a unit cost. Divide appropriately before entering the per-unit figure.
- Omitting or double-counting costs. Classify each included expense consistently.
- Ignoring zero or negative contribution. More sales cannot cover positive fixed costs when each unit contributes nothing or increases the loss.
- Rounding a fractional target down. Whole products require a rounded-up quantity based on the unrounded result.
- Assuming costs and sales mix never change. Volume discounts, capacity limits, and product mix can change the assumptions.
Frequently Asked Questions
What is the break even point?
It is the sales volume at which total revenue equals the fixed and variable costs included in the analysis. At that volume, the modeled total profit is zero.
How do I calculate break even units?
Subtract variable cost per unit from selling price per unit, then divide fixed costs by that contribution margin. The formula requires a positive contribution margin to give a usable sales target.
What counts as fixed costs?
Fixed costs are costs that do not change with sales volume within the range and period you are modeling, such as a monthly lease or a fixed software subscription. Classify costs consistently for your own business.
What counts as variable cost per unit?
Variable costs change with the number of units sold. They may include materials, packaging, or per-sale fees. Use the variable cost for one unit, not the total for all units.
Is Profit Per Unit the same as net profit?
No. Here it means selling price minus variable cost per unit, also called contribution margin per unit. That amount helps cover fixed costs before creating total business profit.
What happens if contribution margin is zero?
With positive fixed costs, sales cannot cover those fixed costs because each unit contributes zero. Break even units and revenue display N/A. If fixed costs are also zero, the model is already at break even at zero sales and remains there at any sales volume.
What happens if contribution margin is negative?
Each sale increases the modeled loss. With positive fixed costs, there is no nonnegative break even sales volume. If fixed costs are zero, zero sales is the break even point, but any positive sales volume creates a loss.
Should I round break even units up?
For indivisible products, round the unrounded formula result up to a whole unit. The main result shows the theoretical quantity, while the result note shows a whole-unit target. Break even revenue uses the unrounded theoretical quantity.
What happens when fixed costs are zero?
Zero sales covers zero fixed costs, so break even units and revenue are zero. Positive contribution margin makes each additional sale profitable in this model; negative contribution margin makes each additional sale a loss.
Can I use this for several products?
This calculator models one product or a representative unit. Products with different prices and variable costs need a weighted contribution margin based on an assumed sales mix. Changing that mix changes the result.
Which period and currency should I use?
Use fixed costs for one consistent period and unit figures applicable to sales in that period. All amounts must use the same currency. Revenue and contribution margin are expressed in that input currency.
Are my inputs stored or sent to a server?
Calculations run in your browser. The calculator does not send inputs to a server or save them in a database or browser storage. Reset clears the form.