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Break-Even Point Calculator

Enter fixed costs, sales, and variable costs (or variable cost ratio) to calculate the contribution margin ratio, break-even sales, break-even ratio, and the sales needed for a target profit in real time.

Last updated: 2026/10/16 Finance Feedback & bug reports
Input
JPY
JPY
JPY
JPY
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Break-Even Sales
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Contribution Margin Ratio
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Break-Even Ratio
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Margin of Safety
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Current Operating Profit
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Sales Needed for Target Profit
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* This tool is for general information and estimation purposes only and does not constitute accounting, tax, or business advice. Actual profit-and-loss calculations vary by accounting standards and individual circumstances. For important business decisions, please consult a qualified professional such as a certified tax accountant or CPA.

Formulas Used

Contribution Margin Ratio = (Sales − Variable Costs) ÷ Sales = 1 − Variable Cost Ratio

The share of sales remaining after variable costs, available to cover fixed costs and profit.

Break-Even Sales = Fixed Costs ÷ Contribution Margin Ratio

The level of sales at which operating profit is exactly zero.

Break-Even Ratio = Break-Even Sales ÷ Actual Sales × 100

Lower is better and more resilient to downturns. The margin of safety is its inverse (100% − break-even ratio).

Required Sales = (Fixed Costs + Target Profit) ÷ Contribution Margin Ratio

The sales required to achieve your target operating profit.

How to Use

1

Enter Fixed Costs and Sales

Enter fixed costs such as rent and salaries, plus your current (or projected) sales. Turn on "Input in 10,000 JPY" to enter values in units of 10,000 JPY.

2

Enter Variable Costs

Enter variable costs such as materials and purchases, either by amount or by ratio (%). Choose whichever is easier with your figures.

3

View the Results

The contribution margin ratio, break-even sales, break-even ratio, and margin of safety are calculated automatically. Enter a target profit to also see the required sales.

About the Break-Even Point Calculator

The break-even point is the level of sales at which total revenue equals total cost, producing neither profit nor loss. This tool calculates the contribution margin ratio, break-even sales, break-even ratio, margin of safety, and the sales needed for a target profit, simply from your fixed costs, sales, and variable costs (or variable cost ratio). Use it for business planning and profitability analysis. All calculations run in your browser, and your input data is never sent to any server.

Features

  • Real-Time CalculationThe break-even point and key metrics update instantly as you type, so you can compare scenarios easily.
  • Amount or Ratio InputEnter variable costs by amount or by ratio (%). Use whichever matches the figures you have.
  • Target Profit Reverse CalculationEnter a target operating profit and the tool back-calculates the sales needed to reach it.
  • Privacy ProtectedEverything runs in your browser. The financial figures you enter are never sent to any server.

Use Cases

  • Estimate the minimum sales needed for a new business or store
  • Simulate how a price cut or increase affects required sales
  • Set minimum sales targets for freelancers and sole proprietors
  • Build sales quotas and budgets back-calculated from a target profit
  • Test the impact of reducing fixed or variable costs

FAQ

What is the break-even point?
It is the level of sales at which total revenue equals total cost (fixed plus variable), so there is neither profit nor loss. Sales above this point produce a profit; below it, a loss. It is a key indicator of a business's profitability threshold.
What is the difference between fixed and variable costs?
Fixed costs stay roughly constant regardless of sales (rent, full-time salaries, leases). Variable costs rise and fall with sales (materials, purchases, sales commissions). Classification can differ by business model.
How are the contribution margin ratio and variable cost ratio related?
The contribution margin ratio is the share of sales available to cover fixed costs and profit, where contribution margin ratio = 1 − variable cost ratio. For example, a 40% variable cost ratio gives a 60% contribution margin ratio. A higher contribution margin ratio means a lower break-even point.
How should I interpret the break-even ratio and margin of safety?
The break-even ratio is the break-even point as a share of actual sales; the lower it is, the safer you are from losses. The margin of safety (100% − break-even ratio) shows how far sales could fall before you slip into the red.
Is my data stored or transmitted?
No. All calculations happen only in your browser, and the financial figures you enter are never sent to or stored on any server. Please note this tool is for general information and estimation only and does not constitute accounting or tax advice.

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Related Guides

What Is the Break-Even Point? Fixed, Variable Costs and How to Find It Learn the meaning of the break-even point and how to calculate it: how to split fixed and variable costs, contribution margin and margin ratio, the formula break-even sales = fixed costs / margin ratio, the break-even ratio, the effect of price cuts and cost reductions, and use in business planning.