Calcority
Free, no signup, no spreadsheet

Know the exact point your business stops losing money.

Enter your fixed costs, your price, and what each unit costs to make. Calcority returns the volume that covers everything, and shows how far that number moves when any one assumption changes.

31,400
models run this month
9 sec
median time to an answer
Break-even volume
369units
About 13 a day, every day of the month.
Revenue required
$21,771
$38 of every sale is left over.
Revenue vs. total cost
RevenueTotal cost
break-even
Assumes a single product and a stable cost base. Nothing is stored.
The method

Three numbers in, one answer out.

Break-even is a subtraction problem, not a forecast. Every unit you sell contributes whatever is left after its own cost. Sell enough of those contributions to cover the bills that arrive whether you sell or not, and you are even.

01
Contribution margin

Price minus variable cost — what one sale actually leaves behind. On your current inputs, that is $38 per unit.

02
Cover the fixed base

Rent, salaries, software, insurance. Divide that base by the margin and the quotient is your volume.

03
Stress the assumptions

Move price by five percent and the volume moves by more. That sensitivity is the part worth planning around.

Sensitivity

What a price change actually costs you.

Built live from the inputs above. Change any one of them and every row recalculates.

Scenario
Price
Margin per unit
Units to break even
-10% price
$53.10
$32.10
437
-5% price
$56.05
$35.05
400
Your price today
$59
$38
369
+5% price
$61.95
$40.95
342
+10% price
$64.90
$43.90
319
Multi-product models

Weight several SKUs by sales mix for a blended break-even across the whole catalogue.

Runway view

Layer growth onto the volume and see which month the two lines finally cross.

Shareable summaries

One link carrying the chart, the assumptions, and a plain-language read for a lender or board.

Saved scenarios

Keep base, best, and worst side by side instead of overwriting a spreadsheet tab.

Stop guessing at the number that decides everything.

Free forever for a single product. Paid plans add multi-SKU models, saved scenarios, and shared links.

Three calculators
001

Break-even calculator

Find the exact unit and dollar where revenue finally overtakes cost.

002

Contribution margin calculator

See what's actually left from each sale once variable costs are paid.

003

CVP calculator

Break-even, target profit, and margin of safety — in one live tool.

Why people stick with it

Know your number instantly

No signup, no spreadsheet setup, no waiting.

Built on real formulas

Every calculator shows its formula in full on the page, not a black box.

Free to start

The core calculators are free forever, not a 14-day trial.

Compare before you commit

See how a price change moves your break-even point before you actually change the price.

Nothing to install

Runs in the browser, on any device.

Your data stays yours

Saved scenarios are access-controlled to your account alone.

Pricing

Start free. Upgrade only when you need to save or export.

Free

$0
forever, no card required
  • Unlimited calculations
  • Live break-even chart
  • Save scenarios
  • Multi-product break-even
  • PDF / Excel export
Use it now
Most people start here

Pro

$9/mo
billed monthly, cancel anytime
  • Everything in Free
  • Unlimited saved scenarios
  • Multi-product break-even
  • CSV import
  • PDF / Excel export
Start free trial

Frequently asked questions

Start with break-even if you just need one number. Use contribution margin if you're comparing pricing on a specific product. Use the CVP calculator if you want a profit target, not just the break-even floor, or want to see your margin of safety at the same time.

Yes. Every calculation and every live chart on every calculator is free with no signup. An account is only needed to save scenarios, run multi-product break-even, or export results.

No, not to calculate anything. You only need one to save a scenario for later or come back to compare numbers you've already run.

Numbers you enter to calculate stay in your browser unless you explicitly save a scenario while signed in. At that point they're stored under your account and access-controlled at the database level, not shared or visible to other users.

The free calculators are built for a single product or service. Multi-product break-even, using a weighted-average contribution margin across your product mix, is a Pro feature.