ROAS Calculator
Return on ad spend.
Return on ad spend.
How to use ROAS Calculator
- Enter your ad revenue and ad spend
- Read your ROAS multiple and ACOS percentage
- Add a profit margin to see profit and break-even ROAS
About ROAS Calculator
The ROAS Calculator turns two numbers — the revenue your ads brought in and what you spent to get it — into a return on ad spend you can actually read. It shows ROAS as a clean ratio like 4.0x, converts the same result into an ACOS percentage for anyone who thinks in Amazon terms, and, when you add a profit margin, works out your profit in real dollars after ad spend plus the break-even ROAS you have to beat.
That break-even number is the one most people come looking for. Break-even ROAS is simply 1 divided by your margin, and it marks the exact point where a campaign stops losing money. It matters most in thin-margin models like dropshipping, where a 3x ROAS can still be a loss. Enter your margin once and the tool draws the line for you, so you can compare it against the ROAS you are actually getting.
The math is the same whatever platform you run on, so it works as a Google Ads ROAS calculator, a Facebook or Meta ads calculator, or a quick ACOS-to-ROAS converter — just plug in the revenue and spend from that account.
Everything runs entirely in your browser. Your revenue, ad spend, and margin figures never leave your device and are never uploaded to a server, so you can check campaign math privately whenever you need it.
Frequently asked questions
- What is ROAS and how is it calculated?
- ROAS (return on ad spend) measures how much revenue you earn for every dollar spent on advertising. It is calculated as revenue divided by ad spend. For example, $4,000 in revenue from $1,000 in ad spend is a ROAS of 4.0x, meaning you made four dollars back for each dollar spent.
- What is the difference between ROAS and ACOS?
- They are two sides of the same coin. ROAS is revenue divided by ad spend, shown as a multiple like 4.0x. ACOS (advertising cost of sales) is ad spend divided by revenue, shown as a percentage. A 4.0x ROAS equals a 25% ACOS. Amazon sellers tend to use ACOS, while most other advertisers track ROAS.
- How do I calculate break-even ROAS?
- Break-even ROAS is 1 divided by your profit margin (as a decimal), or 100 divided by your margin percentage. If your profit margin is 40%, your break-even ROAS is 2.5x — meaning you must earn at least $2.50 in revenue per ad dollar just to cover the product cost plus the ad spend. Enter your margin in this calculator to see it automatically.
- How do I convert ACOS to ROAS?
- ROAS is the inverse of ACOS. Divide 1 by your ACOS as a decimal, or divide 100 by your ACOS percentage — a 25% ACOS becomes a 4.0x ROAS. This calculator shows both figures at once, so entering your revenue and spend gives you the ACOS-to-ROAS conversion without any extra math.
- Can I use this as a Google Ads or Facebook ads ROAS calculator?
- Yes. ROAS math does not change from one platform to the next — it is always revenue divided by ad spend. Pull the revenue and spend from your Google Ads, Meta, TikTok, or any other account, enter them here, and the ROAS, ACOS, and break-even figures all work the same way.
- How do I find break-even ROAS for dropshipping?
- Use your product margin after the cost of goods. If you keep 30% margin, your break-even ROAS is 1 divided by 0.30, or about 3.33x, so any campaign below that is losing money even when it looks like it is working. Thin dropshipping margins push break-even ROAS higher than most people expect, which is why entering your real margin matters.
- Does the calculator show ROAS as a ratio or a percentage?
- Both. ROAS is displayed as a ratio or multiple, such as 4.0x, and the same performance is also shown as an ACOS percentage. You do not have to choose — read whichever format you, your team, or your ad platform prefers.
- Can it show my profit in dollars, not just a ROAS multiple?
- Yes, as long as you enter a profit margin. Alongside the ROAS ratio, the tool calculates your actual profit in dollars after ad spend, so you can see the real money left over instead of only a multiple.
- What is a good ROAS for my campaigns?
- It depends on your profit margin, not a universal number. A 3x–4x ROAS is a common baseline for e-commerce, but a business with thin margins may need a much higher ROAS to profit, while a high-margin business can profit at a lower one. The most reliable target is any ROAS above your break-even ROAS, which this tool calculates when you enter your margin.
- Is this ROAS calculator free to use?
- Yes, it is 100% free with no account, sign-up, or limits. Use it as often as you like.
- Is my data uploaded or stored anywhere?
- No. The calculator runs entirely in your browser, so your revenue, ad spend, and margin figures never leave your device and are never sent to or stored on any server. Nothing is uploaded.