MER calculator
Your revenue against everything you spend on marketing, in one number that says whether your store is growing profitably.
Change the numbers and the result updates at once.
What does the result mean?
MER measures all marketing together, so no platform crediting itself can fool it. It is the number that ties ads to the bank account.
If the number is 5x or more
Marketing is working efficiently. The next question: can you spend more without the number dropping much?
If the number is below 3x
Spend is eating a large part of revenue. Review the weakest campaigns and product margins before any increase.
How is it calculated?
MER = total revenue ÷ total marketing spend over the same period, across every channel.
A store with 1,200,000 in revenue that spent 240,000 on marketing:
1,200,000 ÷ 240,000 = 5.0x
Spend equals 20% of revenue.
Questions
What is the difference between MER and ROAS?
ROAS measures one platform or campaign by the sales it credits itself with. MER measures all revenue against all spend, so overlapping platforms do not distort it.
What counts as marketing spend?
Everything you pay to bring in sales over the same period: ads on every platform, influencers, marketing tools and agency fees.
Is this the same calculator as on the home page?
Yes, with the same calculation and the same grading. Here it has its own page, with what the result means and how it is worked out.
Related tools
Ad profit calculator
The lowest ad return that keeps you from losing, and the most an order may cost.
POAS calculator
The real profit from your ads, not the sales.
Ad budget planner
The budget and the orders your sales target needs.
The next step.
The result is a starting point. In the Growth Audit we compare it with your store's and campaigns' real numbers.