Calculators
Free MER Calculator (No Sign-Up Cost, Unlimited)
MER Calculator — 100% free, unlimited, no sign-up cost.
Marketing Efficiency Ratio (MER) compares your whole business's revenue to total ad spend, not just the revenue your ad platforms claim credit for — a check against over-crediting attributed ROAS.
Calculate MER (Marketing Efficiency Ratio) — total revenue against total ad spend, company-wide. It runs instantly inside GrowthGadgetAi's Marketing Toolkit — completely free, with unlimited uses, no credit cost and no credit card required.
Use the MER Calculator online at no cost.Common tasks this tool helps with
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Try MER Calculator free
The MER formula
MER = Total Revenue ÷ Total Ad Spend
Marketing Efficiency Ratio (MER) compares your whole business's revenue to total ad spend, not just the revenue your ad platforms claim credit for — a check against over-crediting attributed ROAS.
Example
The business did $150,000 in revenue on $25,000 of total ad spend.
$150,000 ÷ $25,000 = 6x MER
Why it's free
This is pure math — the formulas below are public, verifiable and computed instantly in your browser. There was never a real cost to charge for here, so it runs free with zero credits. With the MER Calculator, you get this without paying per generation or hitting a credit wall.
What you get
- Marketing efficiency ratio: total business revenue ÷ total ad spend across all channels
Who uses the MER Calculator
- DTC brands tracking total revenue against total marketing spend
- Founders who distrust platform attribution
- Growth leads comparing months without channel-level tracking
How it works
- Enter your Total business revenue ($) and Total ad spend, all channels ($)
- See your x MER instantly, no submit button needed
- Use the number in your reporting or planning
Frequently asked questions
Is the MER Calculator free?
Yes. Every one of GrowthGadgetAi's Marketing Toolkit tools, including the MER Calculator, is completely free with unlimited use — no credits, no plan requirement and no credit card.
Do I need to create an account to use it?
The MER Calculator runs without signing up — a free GrowthGadgetAi account only matters if you want your history saved, and it never requires a card.
How is the MER Calculator's result calculated?
It's a direct formula, not an AI guess — the MER Calculator computes your x MER from the numbers you enter, instantly and the same way every time.
How do I use the MER Calculator?
1) Enter your Total business revenue ($) and Total ad spend, all channels ($). 2) See your x MER instantly, no submit button needed. 3) Use the number in your reporting or planning. The whole process takes about a minute and runs on this page, on desktop or mobile.
What is the formula behind the MER Calculator?
MER = Total Revenue ÷ Total Ad Spend. Marketing Efficiency Ratio (MER) compares your whole business's revenue to total ad spend, not just the revenue your ad platforms claim credit for — a check against over-crediting attributed ROAS.
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