Formula Used
ROAS = Net attributed revenue ÷ ad spend.
ROAS percentage = ROAS × 100.
Net attributed revenue = Revenue × attribution credit × (1 − refund rate).
Contribution profit after ads = Net revenue × (1 − cost of goods sold percent) − ad spend − other campaign costs.
Break even ROAS = ((ad spend + other costs) ÷ contribution margin rate) ÷ ad spend.
CPC = ad spend ÷ clicks. CPM = ad spend ÷ impressions × 1000.
CPA = ad spend ÷ conversions. CTR = clicks ÷ impressions × 100.
Conversion rate = conversions ÷ clicks × 100.
How To Use This Calculator
Enter the campaign name and currency symbol. Add total attributed revenue and ad spend for the same date range.
Enter margin details with cost of goods sold, other campaign costs, refund rate, and attribution credit. These fields make the result more useful than basic ROAS alone.
Add impressions, clicks, and conversions to calculate CPC, CPM, CTR, CPA, and conversion rate. Enter a target ROAS to see the revenue gap.
Press calculate. The result will appear below the header and above the form. Use the CSV or PDF buttons to save the result.
Example Data Table
| Campaign |
Revenue |
Ad Spend |
ROAS |
CPA |
Profit Note |
| Search Brand |
$18,000 |
$3,000 |
6.00 : 1 |
$18.75 |
Strong return |
| Social Prospecting |
$22,500 |
$7,500 |
3.00 : 1 |
$46.88 |
Needs margin review |
| Retargeting |
$12,000 |
$2,400 |
5.00 : 1 |
$24.00 |
Good efficiency |
Return on Ad Spend Guide
Return on ad spend shows how much revenue each ad dollar creates. It is simple, but it is powerful. A high ROAS can point to strong targeting, better offers, and clean tracking. A low ROAS can warn you about wasted spend, weak landing pages, or low order value.
Why ROAS Matters
ROAS helps teams compare campaigns with different budgets. A small campaign can beat a large campaign when it returns more revenue per dollar. The metric also helps you test channels. Search, social, display, email boosts, and retargeting may each need a different target. Your target should match your margin. A campaign with high product costs needs a higher ROAS than a digital product campaign.
Using Margin With ROAS
Basic ROAS uses revenue divided by ad spend. That view is useful for quick checks. It does not show profit. This calculator adds cost of goods, refunds, attribution credit, and other costs. That gives a better view of contribution profit. It also estimates break even ROAS. Break even is the point where margin covers ad spend and extra campaign costs.
Reading The Results
Look at ROAS ratio first. A value of 4 means the campaign returns four dollars for every dollar spent. Then review profit after ads. This number can be negative even when ROAS looks good. Check CPA and average order value together. If CPA is close to order value, margin may disappear. Also review CTR and conversion rate. Low CTR may show weak creative. Low conversion rate may show landing page friction.
Improving Campaign Performance
Start with clean tracking. Use the same date range for revenue and spend. Exclude organic sales when possible. Adjust attribution credit when several channels share the sale. Next, improve the offer. Better bundles, free shipping thresholds, or stronger guarantees can raise order value. Finally, control bids and budgets. Move money toward campaigns above target. Reduce spend on campaigns below break even. Test changes one at a time. Clear testing makes future decisions easier.
Common Mistakes
Do not judge ROAS alone. Check margins, cash flow, and repeat purchases. A lower first order ROAS may still work when customer lifetime value is high. Record assumptions so reports stay clear for everyone.
FAQs
What is return on ad spend?
Return on ad spend shows revenue earned for each unit of ad spend. A ROAS of 4 means the campaign produced four revenue units for every one spent.
What is the basic ROAS formula?
The basic formula is revenue divided by ad spend. This calculator also adjusts for refunds, attribution credit, margin, extra costs, and lifetime value.
Is ROAS the same as ROI?
No. ROAS focuses on ad revenue compared with ad spend. ROI usually includes broader costs and measures profit compared with total investment.
What is a good ROAS?
A good ROAS depends on margin, product cost, repeat purchases, and goals. A campaign can need 2, 4, or higher to be profitable.
Why should I include cost of goods sold?
Cost of goods sold helps estimate real profit. High revenue can still be weak when product costs, refunds, and campaign costs are high.
What does break even ROAS mean?
Break even ROAS is the ROAS needed to cover ad spend and extra costs after margin. Below that point, the campaign may lose money.
Why use attribution credit?
Attribution credit adjusts revenue when multiple channels helped create a sale. Use a lower value when the ad only deserves partial credit.
Can I download the calculator result?
Yes. After calculation, use the CSV or PDF button above the form. The exported file includes all key campaign metrics.