Break Even ROAS Calculator
What revenue-to-ad-spend multiple covers my entered variable cost share? Check the formula, a worked example and the stated measurement limits.
Result for the values shown.
Calculations run in your browser.
What to enter
| Input | Meaning and units |
|---|---|
| Pre-ad contribution margin (%) | Enter percentage units: 80 means 80%, not 0.8. |
Understanding your result
Use the threshold for a contribution comparison. A margin of 25% needs 4× ROAS before any excluded fixed costs or desired profit.
Common mistakes
- Gross product margin may omit delivery and payment costs.
- Break-even contribution does not mean the whole business breaks even.
Check your calculation
- Use the worked example as a known reference case, then change one input at a time and check the direction and units of the response.
Choose a consistent measurement basis
Include the variable costs that apply to these orders before advertising: product cost, payment fees, returns and fulfilment under a consistent revenue basis.
A second independently worked case
With no included variable costs, one revenue unit covers one ad-spend unit. Inputs: Pre-ad contribution margin: 100 %. Results: Contribution break-even ROAS: 1 ×; Contribution break-even ROAS: 100 %.
Precision and output units
Displayed results: Contribution break-even ROAS in ×, rounded to 3 decimal places; Contribution break-even ROAS in %, rounded to 2 decimal places. Display rounding does not establish the precision of the original measurements or estimates. A small positive rate can round to 0.00%; inspect the underlying counts before treating displayed zero as an absence of events.
Calculation checks, sources and review limits
What revenue-to-ad-spend multiple covers my entered variable cost share?
What revenue-to-ad-spend multiple covers my entered variable cost share? Check the formula, a worked example and the stated measurement limits.
Common uses
- What revenue-to-ad-spend multiple covers my entered variable cost share
- Compare Break Even ROAS across scenarios under matching definitions.
How it works
Convert pre-ad contribution margin to a fraction and take its reciprocal. This finds the ROAS at which contribution from attributed sales equals entered ad spend.
Worked example
A 40% pre-ad contribution leaves 0.40 per revenue unit; 1 ÷ 0.40 = 2.5×. Enter pre-ad contribution margin 40 %. The independently worked result is contribution break-even roas 2.5 ×; contribution break-even roas 250 %. Compare this example with your reporting definitions before substituting your own figures.
FAQ
What does a 20% contribution margin imply?
The contribution break-even multiple is 1 divided by 0.20, or 5×. At that point, modeled contribution equals ad spend; nothing remains for excluded fixed costs or profit.
Should I enter gross product margin or contribution margin?
Use the pre-ad margin that includes the variable costs relevant to the order economics you want to assess. Product margin alone may omit payment, delivery, return or service costs.