Advertising
ROAS Calculator
Enter ad spend and revenue to get ROAS and ACoS, plus CPC, cost per order, conversion rate, and break-even ROAS from your margin. Runs in your browser.
Measure how efficiently your advertising turns spend into revenue. Add a profit margin to see the break-even ROAS you need to stay profitable. Everything is computed in your browser — no ad account connection, nothing sent to a server.
ROAS
4×
You earned 4× on ad spend (ACoS 25%). That's at or above your break-even ROAS of 3.33× — profitable on these ads.
Ad metrics
- ROAS
- 4×
- ACoS
- 25%
- Cost per click (CPC)
- $0.50
- Cost per order
- $6.25
- Conversion rate
- 8%
- Average order value
- $25.00
Break-even (from margin)
- Break-even ROAS
- 3.33×
- Break-even ACoS
- 30%
- Profit after ad spend
- $50.00
How is this calculated?
ROAS = Revenue ÷ Ad spend
ACoS = Ad spend ÷ Revenue × 100
CPC = Ad spend ÷ Clicks. Cost per order = Ad spend ÷ Orders.
Conversion rate = Orders ÷ Clicks × 100
Break-even ROAS = 100 ÷ Margin % (break-even ACoS equals the margin %)
ROAS and ACoS
ROAS and ACoS are two views of the same thing: how much revenue your ad spend produces. ROAS is a multiple (revenue per dollar spent); ACoS is the percentage of revenue that went to ads. Sellers on Amazon often use ACoS, while many other channels report ROAS.
Why break-even ROAS matters
A high ROAS is not automatically good and a low one is not automatically bad — it depends on your margin. Break-even ROAS turns your margin into the exact threshold your advertising needs to clear to be profitable.
Clicks, orders, and efficiency
Adding clicks and orders reveals cost per click, cost per order, and conversion rate. Together these show whether a weak ROAS comes from expensive clicks, poor conversion, or a low average order value.
Pairing with profit tools
Advertising is one cost among many. To see the full picture including fees and fulfillment, combine this with the ecommerce profit and margin calculators.
Frequently asked questions
What is a ROAS calculator?
It turns your ad spend and revenue into return-on-ad-spend metrics — ROAS and ACoS — and, when you add orders, clicks, and a margin, also CPC, cost per order, conversion rate, and break-even ROAS.
What is ROAS?
ROAS (return on ad spend) is revenue divided by ad spend. A ROAS of 4 means you earned $4 in revenue for every $1 spent on ads. It is usually shown as a multiple.
What is ACoS?
ACoS (advertising cost of sales) is ad spend divided by revenue, as a percentage. It is the inverse view of ROAS — a 25% ACoS is the same as a 4× ROAS.
What is the difference between ROAS and ACoS?
They describe the same relationship from opposite sides. ROAS = revenue ÷ ad spend; ACoS = ad spend ÷ revenue. Higher ROAS and lower ACoS both mean more efficient advertising.
What is break-even ROAS?
Break-even ROAS is the ROAS at which advertising profit is zero, given your product margin: 100 ÷ margin %. If your margin is 30%, your break-even ROAS is about 3.3× — below that, the ads lose money.
What is a good ROAS?
It depends entirely on your profit margin, so there is no universal number. Compare your ROAS to your break-even ROAS: anything above it is profitable, anything below it is not. Enter your margin above to see the break-even point.
How do I calculate cost per click and cost per order?
Cost per click (CPC) is ad spend ÷ clicks; cost per order (or cost per acquisition) is ad spend ÷ orders. Enter clicks and orders above to see both, along with your conversion rate.
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