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MER Calculator

MER Calculator

mer calculator Calculate marketing efficiency ratio and compare total revenue with total marketing spend.

Calculate marketing efficiency ratio from total revenue and total marketing spend for blended paid marketing performance.

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Marketing efficiency ratio

4.00x

Marketing spend as revenue

25.00%

$25,000.00 in marketing spend produced $100,000.00 in revenue, or 4.00x MER.

MER means marketing efficiency ratio. It compares total revenue with total marketing spend, which makes it useful for blended marketing performance.

The formula is simple: MER = total revenue / total marketing spend. If a store produces $100,000 in revenue from $25,000 in marketing spend, MER is 4.00x.

Use MER when campaign-level attribution is messy or when you want a broad view of how efficiently marketing spend supports revenue. It is common in ecommerce reporting because channels can influence each other across the full customer journey.

MER should not replace detailed campaign metrics. It is best reviewed alongside ROAS, ROI, AOV, LTV, CAC, CPA, conversion rate, and profit margin. A strong MER can still hide weak margins, high refunds, or poor retention.

How to use it

Step 1

Enter total revenue for the store, business, or reporting period.

Step 2

Enter total marketing spend from the same period.

Step 3

Review the marketing efficiency ratio.

Step 4

Compare MER with ROAS, ROI, AOV, LTV, CAC, and margin before scaling spend.

FAQ

What is MER?

MER means marketing efficiency ratio. It compares total revenue with total marketing spend.

How do you calculate MER?

Divide total revenue by total marketing spend. For example, $100,000 revenue from $25,000 marketing spend equals 4.00x MER.

Is MER the same as ROAS?

No. MER usually uses total revenue and total marketing spend, while ROAS is often campaign-specific or channel-specific.

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