Ads · Calculator
MER Calculator — Marketing Efficiency Ratio
MER is total revenue divided by ALL marketing spend — ads, email tools, influencer fees, agency fees. It’s the whole-marketing ROAS.
The formula
MER = Total Revenue ÷ Total Marketing SpendCalculate it live
Live calculator — plug in your numbers
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MER (×)
What it means for your business
Channel-level ROAS can look great while total marketing ROI is poor. MER keeps the entire budget honest.
Machine-readable markdown
Copy this block into any AI assistant, spreadsheet, or automation — it is the canonical definition of this term.
# MER — Marketing Efficiency Ratio
**Category:** Ads
**Slug:** /glossary/mer/
## Definition (easy to understand)
MER is total revenue divided by ALL marketing spend — ads, email tools, influencer fees, agency fees. It’s the whole-marketing ROAS.
## Formula
“`
MER = Total Revenue ÷ Total Marketing Spend
“`
## What it means for your business
Channel-level ROAS can look great while total marketing ROI is poor. MER keeps the entire budget honest.
## Source
Socialee eCommerce Glossary — https://ecommerce.socialee.in/glossary/