Marketing Efficiency Ratio Calculator
Calculate your Marketing Efficiency Ratio (MER) — total revenue divided by total marketing spend — to see blended marketing performance across channels.
Free · No signup · Updated June 2026
Your numbers
Results
Estimates for planning only. Your real results depend on audience, creative, and market conditions.
What it measures
Marketing Efficiency Ratio (MER) is total revenue divided by total marketing spend across all channels, giving a blended view of overall marketing performance.
Formula
MER = Total revenue ÷ Total marketing spend
Worked example
$50,000 in total revenue on $12,500 of total marketing spend is a 4× MER, with marketing costing 25% of revenue.
Typical benchmarks
- Common MER target
- 3-4×
- Spend as % of revenue
- 20-30%
- Scope
- All channels blended
How this calculator works
MER = total revenue ÷ total marketing spend. Unlike ROAS, MER is blended across every channel, giving a true top-down view of marketing efficiency that's immune to attribution gaps.
Frequently asked questions
MER vs ROAS — what's the difference? +
ROAS measures a single channel or campaign; MER measures all revenue against all marketing spend, sidestepping cross-channel attribution problems.
What's a good MER? +
It depends on margins, but many brands target a MER of 3–4×. Track the trend over time more than the absolute number.
Why use MER instead of platform ROAS? +
Platform ROAS double-counts and is distorted by attribution and privacy changes. MER uses total revenue and total spend, so it can't be gamed by attribution settings.
Is MER the same as blended ROAS? +
Effectively yes — both divide total revenue by total ad or marketing spend. MER is the term more often used to emphasize the holistic, cross-channel view.
How do I improve my MER? +
Shift budget toward channels with the best incremental contribution, cut underperforming spend, and grow organic and retention revenue that lifts the numerator without raising spend.
Need a custom Google Ads tool, not a generic calculator?
This free marketing efficiency ratio calculator gets you a number. If you want it wired to your live ad data, GlitchFi builds custom marketing calculators, dashboards, and internal tools, plus full MVPs, with a forward-deployed engineer on your team. Fixed price, 30 days, and you pay nothing if we're late. You own all the code.
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