ROAS Calculator

What this ROAS calculator does

You spent money on ads. Some revenue came back. Return on ad spend is the ratio between those two things, and it is the single most quoted number in digital marketing.

Give this calculator your revenue and your ad spend and it returns your ROAS as a multiple and as a percentage. There is a currency selector so the output reads properly in dollars, rupees, euros or pounds.

That is a genuinely useful number and it is also, on its own, not enough to tell you whether the campaign made money. A 4x ROAS is excellent for one business and bankrupting for another, and the thing that decides which is your gross margin. That has a section of its own and it is the part worth reading.

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How to use it

1. Choose your currency. Cosmetic, it just labels the output. The ratio itself is currency free.
2. Total Revenue from Ads. Revenue attributable to the campaign, not your total revenue for the period. Getting this figure right is harder than it sounds and there is a section on why.
3. Total Ad Spend. What you paid the platform. Be consistent about whether you are including agency fees, creative costs and tooling, and note that most people do not, which is worth remembering when comparing your ROAS against someone else's.

Press Calculate. Press Reset to clear it.

Use the same time window for both figures. Revenue from March against spend from March. Mixing periods is the fastest way to a number that means nothing, and it happens more often than you would think when a campaign has a long consideration cycle.

The formula, and the two ways it gets reported

ROAS = revenue from ads ÷ ad spend

That is the whole thing. Spend 10,000, get 40,000 back, and your ROAS is 4.

It gets written two ways and they mean the same thing. As a multiple it is 4, or 4x, or 4:1. As a percentage it is 400 percent. The calculator gives you both because different platforms and different people use different conventions, and a meeting where one person says 4 and another says 400 percent is a meeting where somebody is about to be confused.

Google Ads works in percentages for its Target ROAS bidding, so a 400 percent target there is the same as telling this calculator you want a 4x return.

The mental shortcut worth having: your ROAS is how many units of revenue each unit of spend brought back. A ROAS of 1 means you got your money back and nothing else. Below 1 and the ads returned less revenue than they cost, before you have paid for a single thing you sold.

A worked example

You spent 10,000 on a campaign. It generated 40,000 in tracked revenue.

ROAS = 40,000 ÷ 10,000 = 4.00, or 400 percent.

Every unit of currency you put in brought back four. That reads like a success, and in a lot of businesses it is.

Now suppose the products you sold carry a 20 percent gross margin. The 40,000 of revenue produced 8,000 of gross profit. You spent 10,000 to get it.

You lost 2,000.

Same campaign, same excellent looking ROAS, and the business is worse off than if it had run no ads at all. That is not a trick example, it is the ordinary situation for any retailer or reseller working on thin margins, and it is why ROAS on its own cannot answer the only question that matters.

The number that decides whether you made money

Every business has a ROAS below which advertising loses money and above which it makes money. It is set entirely by gross margin, and the formula is short:

Break-even ROAS = 1 ÷ gross margin

Read that table and the whole ROAS conversation changes shape. A software business at 90 percent margin breaks even at 1.11x, so a 3x ROAS is pouring money into the bank. An electronics reseller at 10 percent margin needs a 10x ROAS before a single unit of profit appears, and a 4x campaign is quietly bleeding.

This is why "what is a good ROAS" is an unanswerable question asked constantly. There is no industry number. There is only your margin.

Work yours out once, write it on something, and every future ROAS reading becomes instantly meaningful. Above the line, keep spending. Below it, stop.

ROAS is not profit, and not ROI

Three numbers get used interchangeably in marketing meetings and they are not the same.

ROAS is revenue divided by ad spend. It ignores what the goods cost you, and it ignores everything else the business spends money on.

ROI on ad spend takes the profit rather than the revenue. Using our example, at a 30 percent margin: 40,000 of revenue produces 12,000 of gross profit, minus the 10,000 spent, giving 2,000 of profit. As a return on the 10,000 that is 20 percent.

So the same campaign is simultaneously a 400 percent ROAS and a 20 percent return. Both figures are correct. They answer different questions, and only one of them tells you whether to keep going.

Net profit is further down still, after salaries, software, rent and everything else. Marketing rarely gets measured there, which is why a marketing team can be delighted while the business is losing money.

Here is the same campaign at a 30 percent margin, read across ROAS levels, showing what each unit of spend actually returns:

Notice how much ROAS you have to clear before anything at all lands in the business. At a 30 percent margin, a campaign returning three times its cost is still losing money.

What ROAS should you be aiming for?

Break even is the floor, not the target. Above it, a few things push the sensible number higher or lower.

Higher than break even, obviously. How much higher depends on what else the money could do. If your break even is 3.33x and you are running at 3.5x, you are making a small profit on a lot of risk and effort.

Repeat purchase changes everything. Break-even ROAS as calculated above assumes the customer buys once. If your average customer buys four times over two years, the first sale can lose money and the relationship still pays. Businesses with real repeat rates deliberately run first-purchase campaigns below break even, which looks reckless on a dashboard and is not. If you are doing this, work from customer lifetime value rather than order value.

Scale and ROAS pull against each other. The cheapest, most obvious audience converts best. Push spend higher and you buy progressively less interested people, so ROAS falls as volume rises. The highest ROAS is usually achieved by spending almost nothing on people who were going to buy anyway. Total profit, not ROAS, is what you are actually optimising.

Some campaigns are not supposed to return revenue. Brand and awareness spend will show a terrible ROAS because the revenue arrives later and attributes elsewhere. Judging it by this metric will get it cancelled, sometimes correctly and sometimes not.

The revenue figure is the soft part

The division is trivial. Deciding what number goes on top is where all the difficulty lives, and it is worth being honest about how soft it is.

Attribution windows. A platform typically credits itself with a sale that happened within some window after a click or a view. Change the window and the same campaign's ROAS changes with it, without anything real changing at all.

Platforms double count. Run Google and Meta together and add up their reported revenue and you will often find you sold more than you actually sold. Both claim the same conversion. Neither is lying by its own rules.

Incrementality. The hardest question. Of the revenue credited to a campaign, how much would have happened anyway? Branded search is the classic case: people searching your company name were mostly going to find you regardless, and paying to appear above your own organic listing can produce a spectacular ROAS while adding very little.

Returns and refunds. Most platform revenue figures are gross at the point of sale. In categories with high return rates, real revenue is meaningfully lower than reported.

None of this makes ROAS useless. It makes it a comparative tool rather than an accounting one. It is excellent for judging campaign A against campaign B measured the same way, and unreliable as a statement about how much money the business made. For that, the finance system is the source of truth.

Questions people ask

What is a good ROAS?

There is no universal answer. Work out 1 divided by your gross margin and that is your break-even point. At a 25 percent margin you need 4x just to stand still. At an 80 percent margin, 1.25x does it.

Is ROAS a ratio or a percentage?

Both are used. A ROAS of 4 is the same as 400 percent. Google Ads uses percentages for Target ROAS bidding, so check which convention you are being quoted in.

What is the difference between ROAS and ROI?

ROAS uses revenue and ignores the cost of goods. ROI uses profit. The same campaign can show a 400 percent ROAS and a 20 percent return at a 30 percent margin.

Should I include agency fees and creative costs in ad spend?

Ideally yes, since they are part of what the campaign cost you. Most reported ROAS figures do not, so if you include them your numbers will look worse than everyone else's while being more honest. Pick one approach and stay with it.

My ROAS is below 1. How bad is that?

The campaign returned less revenue than it cost, before accounting for the cost of anything you sold. Unless you are deliberately buying first purchases to win repeat customers, that needs stopping rather than optimising.

What is blended ROAS?

Total revenue across the whole business divided by total ad spend, rather than campaign by campaign. It sidesteps the attribution problem because it does not care which channel gets credit, and it is a better guide to whether marketing overall is working.

References

A note on sourcing. Return on ad spend is a definitional ratio rather than a regulated figure, but the way major platforms define and target it shapes how the number is reported. The Google Ads documentation below sets out how Target ROAS bidding treats the metric and how conversion values, which form the revenue side of the ratio, are measured.

1. Google Ads Help, About Target ROAS Bidding. https://support.google.com/google-ads/answer/6268637?hl=en
2. Google Ads Help, About Conversion Values. https://support.google.com/google-ads/answer/13064207?hl=en
3. Google Ads Help, About Maximize Conversion Value Bidding. https://support.google.com/google-ads/answer/7684216?hl=en