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ROAS & ad break-even calculator

See whether advertising can pay for itself, after the cost of what you sell.

01 / YOUR INPUTS
Product, payment fees, shipping and other per-sale costs.

Use the same month for your goal and costs. Changing period relabels; it does not convert inputs. Use consistent tax-exclusive amounts. Currency changes formatting, not exchange rates. Inputs reset when you leave or reload this page.

02 / YOUR PLANLive calculation

Return on ad spend

2.5×

for your month

Break-even ROAS1.67×
Maximum acquisition cost$30.00
Profit after ads$1,000.00

ROAS is attributed revenue divided by ad spend. Zero sales gives 0× ROAS and a loss equal to ad spend. Break-even ROAS covers variable costs and ads only, not fixed overhead. Attributed sales are not necessarily incremental sales.

No sign-up. No financial inputs sent to a server.
UNDERSTAND YOUR NUMBERS

The formula, without the mystery.

ROAS = attributed revenue / ad spend; break-even ROAS = price / (price − variable cost)

A worked example

100 sales at 50 generate 5,000 revenue. On 2,000 ad spend, ROAS is 2.5×. With 20 variable cost, contribution after ads is 1,000, before fixed costs.

Does a high ROAS always mean profit?

No. The margin matters. A low-margin product needs a higher ROAS, and fixed overhead still needs to be covered separately.

Keep the assumptions consistent

Use one planning period and one currency. Enter amounts consistently excluding sales tax or VAT. These simplified models do not account for uncertainty, inventory limits, working capital or progressive taxes. Results are planning estimates.

Find the ROAS your margin can support

How to calculate e-commerce profit after fees

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