Break-Even Calculator

Break-even units = Fixed costs ÷ (Selling price − Variable cost per unit). The denominator is your contribution margin per unit — how much of each sale is left after variable costs to pay down fixed costs. Break-even revenue = break-even units × selling price.

They use the same core math, but this calculator lets you derive the selling price from a target gross margin or markup percentage instead of typing it directly, and adds a margin-of-safety check against your actual sales forecast.

Margin of safety measures how far your expected sales sit above the break-even point, as a percentage. A small margin of safety means a modest sales shortfall could push you into a loss; a large one means more cushion.

Yes, if you can express an "average" selling price and variable cost across your product mix — otherwise it's more accurate per product line, since different products usually have different margins.