ROAS calculator
Enter revenue and ad spend to calculate ROAS. Keep the currency and reporting window the same for both numbers.
Inputs stay in this browser. This tool does not fetch account data, forecast results or identify a winning creative.
Input format and limits
Nonnegative numbers, a decimal point and up to 6 decimal places. Commas must group thousands, such as 50,000. Inputs are limited to 1,000,000,000,000. Results cannot exceed the safe supported numeric range. A 0 denominator is undefined. Very small nonzero results retain decimal precision.
Enable JavaScript to calculate. The formulas and examples below work without it.
How to calculate ROAS
ROAS = attributed revenue ÷ ad spend. In an illustrative example, $2,400 revenue ÷ $600 ad spend = 4× ROAS, or 400%. 4 dollars of entered revenue for each dollar of entered ad spend. Google Ads defines conversion value per cost as conversion value divided by cost. If your conversion value includes non-revenue values, describe that ratio accordingly rather than calling it sales revenue.
Calculate return on ad spend, attributed revenue or spend from 2 inputs. Use one currency and a consistent attribution window.
Calculate revenue or spend
Revenue = ROAS × spend. At 4× and $600 spend, the scenario gives $2,400 revenue. Spend = revenue ÷ ROAS. At $2,400 revenue and 4×, it gives $600 spend. Enter 4 for 4×, not 400. These calculations use the ROAS you enter. They cannot predict auction prices, sales or how much you should spend.
ROAS is different from profit
ROAS excludes costs other than the entered ad spend. Product costs, returns, discounts, fulfilment, fees and other expenses can change profitability. A 1× ratio is not a universal break-even point. This calculator does not recommend a profitable target or calculate return on investment.
Choose your revenue definition first
Use the same reporting scope, currency and time window for both amounts. Note whether revenue is gross or net of returns and whether taxes or shipping are included. Record the attribution method and conversion window. A platform may credit an ad for a sale without proving the ad caused an extra sale. We calculate from the revenue you enter. We do not measure your revenue here.
Combine campaigns using totals
If A has $500 revenue on $100 spend and B has $1,800 revenue on $900 spend, their ratios are 5× and 2×. Combined ROAS is $2,300 ÷ $1,000 = 2.3×, not the unweighted average of 3.5×. These numbers are an original arithmetic example, not advertiser results.
Handle 0 and review the creative separately
0 revenue with positive spend gives 0×. 0 spend cannot be a denominator. 0 ROAS cannot solve for spend. ROAS won’t explain what made the ad work. Look at the creative, the offer and the reporting conditions before deciding what to make next.