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Find the sales volume or revenue needed to cover all your costs — and see how profit changes at different sales levels with a visual break-even chart.
| Sales (Qty) | Revenue | Total Cost | Profit / Loss |
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Break-Even Calculator · client-side only · interactive profit curve · volume projection
Fixed costs (rent, salaries, software — costs that don’t change with sales volume) and variable costs per unit (materials, commission, delivery — costs that scale with each sale).
The price you charge per unit or transaction.
Units needed to break even, revenue needed to break even, and a chart showing profit/loss at different sales volumes.
Break-Even Units = Fixed Costs / (Selling Price per Unit − Variable Cost per Unit). The denominator is the contribution margin per unit — the amount each sale contributes toward covering fixed costs. Once enough units are sold to cover all fixed costs, each additional unit generates profit at the contribution margin rate.
Contribution margin = Selling Price − Variable Cost per Unit. It’s the amount each unit sold contributes toward covering fixed costs and then generating profit. A unit sold at £50 with £30 variable cost has a £20 contribution margin — you need to sell enough units that the sum of £20 contributions covers all fixed costs.
A higher selling price increases the contribution margin, meaning fewer units are needed to break even. A lower price reduces the contribution margin, requiring more units. The sensitivity of break-even to price changes — especially for businesses with high fixed costs and low variable costs — is one of the most valuable insights this calculator provides.
No. All calculations run in your browser. No data is transmitted.
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Break-even analysis is the foundational profitability question for any business: at what sales volume do revenues cover all costs and the business stops losing money? Understanding this number is essential for pricing decisions, production planning, investment appraisal, and evaluating the risk profile of a business model. This calculator computes the break-even point in both units and revenue, and generates a visual chart showing the profit/loss curve across different sales volumes — making it immediately clear how sensitive profitability is to price changes, volume shifts, and changes in the cost structure. The chart is particularly valuable for understanding the margin of safety between current sales and the break-even threshold.
All calculations run in your browser. No data is transmitted to any server.
