Free Break-Even Calculator Online

Find Your Break-Even Point From Three Numbers

A break-even calculator answers the question every new price, product, or service eventually raises: how many units do you have to sell before you stop losing money and start making it? This break-even calculator takes three inputs — your fixed costs, your price per unit, and your variable cost per unit — and instantly returns the exact number of units and the exact revenue figure at which your fixed costs are fully covered. Everything sold above that point is profit; everything below it isn't.

Break-even analysis is one of the oldest and most useful tools in small-business finance precisely because it stays this simple. You don't need a full financial model to know whether a price you're considering can realistically cover your rent, salaries, and other fixed overhead — you need three honest numbers and a break-even calculator.

How the Break-Even Calculator Works

This tool uses a two-pane text interface rather than three separate boxes, so the whole calculation happens in one place:

1. Open the tool and you'll see two panes: an input pane labeled Costs & Price Input on the left, and a results pane labeled Break-Even Result on the right.
2. Type or paste three lines into the input pane, one number per line: total fixed costs, price per unit, and variable cost per unit. A placeholder example — 10000, then 50, then 20 — shows the expected format.
3. With Real-time Auto-Convert switched on, which is the default, the result appears automatically about 300 milliseconds after you stop typing. No button to click, no page to reload.
4. Prefer to control exactly when it calculates? Flip the Real-time Auto-Convert switch off, and a Convert button takes its place.
5. The results pane returns a plain-text breakdown: your fixed costs, your price and variable cost per unit, the break-even unit count, the break-even revenue figure, and your contribution margin per unit.
6. Use the Copy button to grab the result for a document or email, or click Save to download it as a plain text file.

When a Break-Even Number Actually Changes a Decision

• Pricing a new product. Before committing to a price, running it through a break-even calculator tells you immediately whether the sales volume you'd realistically need is plausible for your market, or wildly out of reach.
• Deciding whether a discount still works. Cutting your price per unit raises your break-even point, sometimes by a lot. Running the discounted price and your existing variable cost through the calculator shows exactly how many more units you'd need to move to come out even.
• Setting a freelance or service hourly rate. Treat your rate as the price, your basic supplies or software cost per project as the variable cost, and your monthly overhead as fixed costs — the break-even unit count becomes the number of billable hours or projects you need each month just to cover your bills.
• Evaluating a cost increase from a supplier. If your variable cost per unit rises, re-running the numbers shows immediately how much more you'd need to sell, or how much you'd need to raise your price, to hold your break-even point steady.
• Writing the financial section of a business plan. Investors and lenders routinely expect a break-even estimate; having the unit and revenue figures ready, with the reasoning behind them, is far more convincing than a vague sales projection.
• Comparing two possible suppliers. A cheaper supplier with slightly worse per-unit terms doesn't automatically win — plugging each supplier's variable cost into the calculator against the same price and fixed costs shows which one actually produces a lower break-even point.

The Math Behind Break-Even, and Its Real Limits

The formula is short: break-even units equal fixed costs divided by the gap between price per unit and variable cost per unit. That gap is called the contribution margin — the amount each unit sold actually contributes toward covering fixed costs once its own variable cost is paid. Break-even revenue is simply that unit count multiplied by the price per unit. This calculator rounds the unit count up to the next whole number, because selling 733.4 units isn't a real outcome; you need to reach 734 full units before every dollar of fixed cost is truly recovered.

There's a case worth understanding before you lean on the result: the calculator requires your price per unit to be higher than your variable cost per unit. If price and variable cost are equal, or if variable cost is actually higher than price, the contribution margin is zero or negative, and there's no volume of sales, no matter how large, that will ever cover fixed costs. In that situation the math returns a nonsensical negative or unusable figure rather than a real break-even point. That result isn't a bug to work around; it's the calculator correctly telling you the pricing itself needs to change before break-even becomes possible at all.

A Worked Example: $10,000 Fixed Costs, $50 Price, $20 Variable Cost

These three numbers are the calculator's own placeholder example, and walking through them by hand shows exactly what the tool is doing. Contribution margin is price minus variable cost: $50 − $20 = $30 contributed toward fixed costs by every unit sold. Break-even units is fixed costs divided by that margin: $10,000 ÷ $30 = 333.33, which the calculator rounds up to 334 units, since 333 units alone would leave a sliver of fixed cost uncovered. Break-even revenue is that unit count times the price: 334 × $50 = $16,700. So a business with $10,000 in fixed costs, a $50 price, and a $20 variable cost needs to sell 334 units, generating $16,700 in revenue, before the 335th unit and every one after it starts contributing to actual profit rather than just covering overhead.

Change any one of those three numbers and watch how the break-even point moves: raise the price to $60 and the contribution margin jumps to $40, dropping break-even to 250 units — a reminder of just how sensitive break-even volume is to price, far more than to small shifts in variable cost.

Aspect	What break-even analysis assumes	Where that can go wrong in practice
Costs	Fixed costs stay fixed no matter how much you sell	Large enough volume often forces genuinely new fixed costs — more staff, a bigger space, another machine
Price	Price per unit stays constant across all volume sold	Real-world pricing often includes bulk discounts or promotions that lower the average price at higher volume
Product mix	You're selling a single product or service at a single price	Most businesses sell several products at different margins, which this three-number model can't capture at once
Simplicity	Three inputs, an instant answer	Genuinely useful for a first estimate, but not a substitute for a full model once the stakes get high

Despite those simplifications, break-even analysis stays popular precisely because it forces clarity: you can't compute it without first pinning down your fixed costs, your price, and your true variable cost per unit — an exercise plenty of businesses put off until it's forced on them by a cash crunch.

Spreadsheets, Business Plan Software, and Other Break-Even Approaches

• A spreadsheet formula. The same division — fixed costs divided by price minus variable cost — takes one cell in Excel or Google Sheets, and scales naturally if you want to chart break-even across a range of possible prices.
• Business planning software. Tools such as LivePlan or Bizplan build break-even analysis into a fuller financial model, useful once you're past the quick-check stage and actually writing a plan.
• Accounting or point-of-sale reports. Platforms that already track your real fixed and variable costs can sometimes generate a break-even figure straight from actual transaction history rather than estimated numbers.
• The API. Developers who want break-even numbers computed inside their own app, spreadsheet, or internal dashboard instead of on this page can call the same calculation as a metered API endpoint; the request format and credit cost are documented at the API docs.

What Happens to the Numbers You Type

The entire calculation — parsing your three lines, dividing, rounding up, formatting the result — runs as JavaScript inside your own browser tab. Your fixed costs, pricing, and cost structure never get transmitted anywhere, which matters if you're pricing something you'd rather not have sitting in a third-party server log. Close the tab and everything you typed disappears along with it.

Break-Even Questions Beyond the Basics

What happens if my price per unit is lower than my variable cost?

There's no break-even point to find in that case; every unit you sell loses money before fixed costs even enter the picture. The calculator returns a negative or unusable number here, which is a signal to raise your price or lower your variable cost, not a sign that something is broken.

Why does the calculator round the break-even unit count up?

Because a fractional unit isn't something you can actually sell. If the exact math says you need 733.4 units to break even, you genuinely need 734 whole units before every dollar of fixed cost is recovered — rounding down would understate what you actually need to sell.

What exactly is contribution margin, and why does the result mention it?

Contribution margin is price per unit minus variable cost per unit, the amount each sale actually contributes toward fixed costs once its own direct cost is covered. It's the figure that determines how steep or shallow your path to break-even is: a higher contribution margin means fewer units needed to get there.

Does this work for a service business, not just a physical product?

Yes. Treat a billable hour, a client project, or a subscription seat as your "unit," its price as your rate or fee, and any direct per-unit cost — contractor pay, software cost per seat, materials — as the variable cost. The formula doesn't care whether the unit is a physical object.

Can I run break-even analysis for more than one product at a time?

Not with this calculator; it's built around a single price and a single variable cost, which covers most quick pricing checks. A business selling multiple products at different margins would need a weighted, multi-product break-even model, which is a more involved spreadsheet exercise entirely.

How is break-even revenue different from break-even units?

Break-even units is the count of individual sales you need; break-even revenue is that count multiplied by your price, giving you the total dollar figure your sales need to reach. Both describe the exact same point — they're just expressed in units versus dollars.

Related Calculators

Once you know your break-even point, the margin calculator helps confirm whether your current price is actually delivering the margin you assumed, and the commission calculator is useful when part of your variable cost includes paying sales staff per unit sold. To see the bigger return picture once you're past break-even, the ROI calculator compares what you invested against what came back, and if your price needs to account for sales tax on top of your break-even figure, the sales tax calculator handles that piece separately.