Marketing ROI, ROAS & CAC Calculator

A high ROAS can still lose money if your margin is thin. Enter ad spend, other marketing costs, revenue and gross margin to see ROAS, real ROI after costs, CAC and the ROAS you need to break even.

Worksheet

Runs entirely in your browser. No data is sent to a server.

Campaign figures
Media budget paid to Google, Meta, LinkedIn etc.
Agency fees, tools, design, freelancers for the same period
Revenue you can attribute to this marketing (net of VAT)
Share of revenue left after cost of goods or delivery
Leave empty if you don't know; CAC is then skipped

Results

This campaign is profitable at the margin you entered.

ROAS
4.50 : 1revenue per 1 unit of ad spend
Marketing ROI
44.0%profit after all marketing costs
Profit after marketing
$1,100gross profit minus all marketing costs
Customer acquisition cost
$83.33all marketing costs per new customer
Break-even ROAS
2.50 : 1minimum ROAS to cover ad spend at this margin
Break-even revenue
$6,250revenue needed to cover all marketing costs
Total marketing cost
$2,500
Gross profit
$3,600

Formulas: ROAS = revenue ÷ ad spend. ROI = (revenue × margin − all marketing costs) ÷ all marketing costs. CAC = all marketing costs ÷ new customers. Break-even ROAS = 1 ÷ margin.

How it works

  1. Enter the ad spend for the period you want to evaluate, for example one month.

  2. Add other marketing costs for the same period, such as agency fees or tools.

  3. Enter the revenue attributed to the campaign and your average gross margin.

  4. Optionally enter the number of new customers to get your customer acquisition cost.

  5. Compare your ROAS with the break-even ROAS: below it, the ads cost more than they earn.

FAQ

What is the difference between ROAS and ROI?

ROAS divides revenue by ad spend and ignores your costs of delivering the product. ROI compares profit after all marketing costs with those costs, so it shows whether the campaign actually made money.

How do I calculate break-even ROAS?

Divide 1 by your gross margin. With a 40 % margin, break-even ROAS is 1 ÷ 0.4 = 2.5, so every unit of ad spend must bring in at least 2.5 units of revenue to cover itself.

Which costs belong in CAC?

For a full CAC, include all sales and marketing costs of the period: ad spend, agency and freelancer fees, tools and, if you can estimate it, the share of staff time spent on acquisition.

What is a good ROAS?

It depends on your margin, repeat purchases and other costs. A ROAS that is comfortably above your break-even ROAS is a better yardstick than any generic target.

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