Marketing ROI Calculator: Prove What Your Ads Return
Ads should earn more than they cost. Use this marketing ROI calculator to see—fast—whether your ads make money.
Enter spend and revenue, then add clicks and orders if you have them. You’ll get ROI up front, plus ROAS, CAC, and conversion for deeper fixes.
How To Use This Marketing ROI Calculator
- Enter ad spend for the period.
- Enter attributable revenue for the same period.
- Open Advanced and add clicks and orders if you track them.
- Click Calculate.
- Review ROAS (×), ROI (%), conversion rate (%), and CAC ($). Re-run for different channels or campaigns.
Key Formulas
- ROAS (×) = Revenue ÷ Ad spend
- ROI (%) = ((Revenue − Ad spend) ÷ Ad spend) × 100
- Conversion rate (%) = Orders ÷ Clicks × 100
- CAC ($) = Ad spend ÷ Orders
ROAS will reveal your revenue payback. ROI shows when you need the profit view on ad dollars alone. Use CAC and conversion rate to fix the funnel.
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Example: One campaign, one week
Inputs: $5,000 spend, $8,700 revenue, 350 clicks, 25 orders.
| Metric | Result |
|---|---|
| ROAS | 1.74× |
| ROI | 74% |
| Conversion rate | 7.1% |
| CAC | $200.00 |
Not bad—scale with care. CAC at $200 is only healthy if your gross margin and repeat rate support it.
What To Do With The Result
Numbers don’t fix themselves. Point them at a decision.
- If ROAS < 1× or ROI < 0%. Pause losers. Redirect budget to proven ad groups or audiences.
- If CAC is high and CVR is low. Fix landing pages, offer clarity, and speed. The cheapest CAC win is usually on-site.
- If ROAS is fine, but margin is thin. Check fee drag and discounting before you scale.
- If results swing week to week. Your attribution window or tagging may be off—clean the plumbing.
Proven Ways To Improve Results
Here’s where most teams find leverage first.
- Tighten targeting and buying. If you’re scaling paid media, compare platforms in the best demand-side platforms roundup.
- Clean your analytics. Bad tags = bad decisions. Start with our guide to digital marketing analytics and use these marketing dashboard examples to instrument what matters.
- Raise conversion rate. Improve the offer, reduce steps, and cut page weight.
- Evaluate your stack. If you’re heavy on ecommerce, shortlist the best ecommerce analytics software. If attribution is the gap, see marketing attribution software.
Benchmarks to Check Yourself Against
- ROAS. Prospecting 1.5–2.5× is common; remarketing often runs higher.
- CAC. Should make sense against your gross margin and LTV. A $200 CAC on a $120 AOV can still work if repeat rate is strong.
- Conversion rate. 2–4% on cold traffic for ecommerce; higher with warm audiences and strong offers.
Close The Loop
Use this weekly. Compare channels. Save screenshots with notes on changes you made.
When ROAS rises and CAC falls, scale the budget deliberately, not all at once. When it dips, you’ll know why—because you were watching.
