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Free ROAS and ACoS calculator

Know if your ads actually make money

Enter your ad spend, sales and costs to see your ROAS next to the ROAS you need to break even. The calculator shows profit after ads and the ROAS to aim for to keep the margin you want.

Free, no sign-upRuns in your browserYour numbers never leave your device
Calculate my ROAS See pricing
$1,000 of ads bringing $4,000 in sales with a 40% margin before ads: ROAS 4.00 against a break-even ROAS of 2.50
$1,000 of ads bringing $4,000 in sales with a 40% margin before ads: ROAS 4.00 against a break-even ROAS of 2.50
Free · runs in your browser

ROAS Calculator

No sign-up. What you type never leaves your device.

I know my
$
Sales from those ads
$
$
Costs per sale
% of revenue
% of revenue
$per order

The starting numbers are only an example. Use the ad spend and sales from your ad platform’s report for the same date range, and your own costs. Currency changes the symbol only. Nothing is converted.

ROAS
–
Losing moneyProfitable
Break-even ROAS–
ACoS (ad spend ÷ ad sales)–
Break-even ACoS–
Margin before ads–
Profit after ads–
Margin after ads–
CPA (cost per order)–
Break-even CPA–
%

How it’s calculated
  • Revenue = ad revenue, or orders × average order value
  • ROAS = revenue ÷ ad spend
  • ACoS = ad spend ÷ ad sales, which is 1 ÷ ROAS
  • Margin before ads = (revenue − product cost − fees − shipping) ÷ revenue, where product cost and fees are their % of revenue and shipping is per order × orders
  • Break-even ROAS = 1 ÷ margin before ads. A 40% margin gives 2.5.
  • Break-even ACoS = margin before ads
  • Target ROAS = 1 ÷ (margin before ads − target margin)
  • Profit after ads = revenue × margin before ads − ad spend
  • CPA = ad spend ÷ orders; break-even CPA = average order value × margin before ads

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Features

Everything you need, nothing you don't

ROAS and ACoS

Revenue ÷ ad spend, and ad spend ÷ ad sales as Amazon sellers know it.

Break-even ROAS

1 ÷ your margin before ads. Below it, every sale from ads loses money.

Target ROAS

The ROAS and ad budget that keep the profit margin you want after ads.

Profit after ads

Revenue less product cost, fees, shipping and ad spend, in money and as a margin.

CPA

Cost per order from ads, next to the most you can pay per order and still break even.

Two ways in

Enter total ad revenue, or orders and average order value.

How it works

Done in 3 steps

01

Enter ad results

Ad spend and the sales from those ads, for the same date range.

02

Add your costs

Product cost and fees as % of revenue, and shipping per order.

03

Compare

Your ROAS against break-even, profit after ads and the ROAS to aim for.

FAQ

Questions about roas calculator

Is the ROAS calculator free?
Yes. It's free with no sign-up.
Are my numbers saved or sent anywhere?
No. The calculator runs in your browser. Your numbers never leave your device.
What is break-even ROAS?
It's the ROAS at which ad spend uses up all the profit from the sales it brings. It's 1 ÷ your profit margin before ad spend. With a 40% margin, break-even ROAS is 1 ÷ 0.4 = 2.5, so every $1 of ads needs to bring $2.50 in sales. Higher means profit, lower means a loss.
What's the difference between ROAS and ACoS?
They're the same numbers flipped. ROAS is ad sales ÷ ad spend, and ACoS, the measure Amazon Ads reports, is ad spend ÷ ad sales. A ROAS of 4 is an ACoS of 25%. Break-even ACoS equals your margin before ads.
How is target ROAS worked out?
Target ROAS = 1 ÷ (margin before ads − target margin). With a 40% margin and a 20% target, that's 1 ÷ 0.2 = 5. If the target is as high as your margin before ads, no ROAS can reach it.
Which revenue should I use?
Use the sales your ad platform attributes to the ads, for the same date range as the spend. Platforms count attribution differently, so a ROAS from one platform isn't directly comparable with another's.
Does it include organic sales?
No. It measures the sales credited to your ads. Ads can also lift sales that aren't credited to them, so look at your total sales and profit over time as well.
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