How this works in your browser
The calculation divides fixed costs by the contribution margin, which is the price per unit minus the variable cost per unit. That margin is the amount each sale contributes toward covering the costs you carry regardless of volume, which is why it, rather than the price, determines how many units you need. When variable cost exceeds price the margin is negative and no volume can ever break even, a case the tool identifies explicitly rather than returning a nonsensical number. The model assumes a single product at a constant price and constant unit cost, which is a simplification worth remembering for a business with tiered pricing or volume discounts.
Break-Even Calculator vs. typical online calculators
| Feature | Break-Even Calculator (in-browser) | Typical online calculators |
|---|---|---|
| Where the maths runs | In your browser, on your device | Often posted to a server to compute |
| Your inputs are stored | Never - nothing is sent or saved | Frequently logged with your session |
| Works offline once loaded | Yes | No - needs a live connection |
| Ads inside the result area | None | Common on free calculators |
| Account required | No | Often, to save or export results |
| Usage limits | None - free, unlimited use | Sometimes capped per day |
Who uses Break-Even Calculator
Pricing a new product
See what volume a given price requires before committing to it.
Evaluating a business idea
Check whether the required sales volume is remotely realistic.
Deciding on a fixed cost
Work out how many extra sales a new hire or subscription must fund.
Setting sales targets
Establish the minimum volume the business needs to stand still.
How to use Break-Even Calculator
- 1
Open the Break-Even Calculator
Go to tools.slaytic.com and open the Break-Even Calculator. No sign-up or account required.
- 2
Enter your fixed costs
Include rent, salaries, subscriptions and your own pay.
- 3
Add price and variable cost per unit
Variable costs are the ones that scale with each unit sold.
- 4
Read the break-even volume
You get the units required and the revenue that represents.
Frequently asked questions
What is the contribution margin?
The amount each unit sold contributes toward covering fixed costs, calculated as price minus variable cost per unit - a higher margin means you break even faster.
What counts as a fixed cost?
Costs that don’t change with sales volume, like rent, salaries, or software subscriptions - as opposed to variable costs like materials, which scale with each unit produced.
What if my price is lower than my variable cost?
You would lose money on every unit sold and could never break even regardless of volume - the tool flags this case directly.
What should I do if the break-even number looks unreachable?
Treat it as the useful answer rather than a failure. It means one of three things has to change: raise the price, reduce the variable cost per unit, or cut fixed costs. Discovering that before launch is far cheaper than discovering it through a year of trading.
Am I paying myself out of fixed or variable costs?
Fixed, and forgetting to include your own salary is the most common way a break-even calculation flatters a business. If the model only breaks even because the founder works unpaid, it has not broken even, it has borrowed against your time.
Does raising the price always lower the break-even point?
Arithmetically yes, because each unit contributes more. Commercially it is not that simple, since a higher price usually means fewer units sold. The calculation tells you the volume required at a given price; whether that volume is achievable at that price is a market question.
Are my business figures sent anywhere?
No. The calculation runs in your browser, so your costs and margins are never transmitted.