Ad Profit Checker
MER · Blended ROAS · Track if your ads are making you money
Switch period to auto-scale your 30D data

What is MER (Blended ROAS)?

MER = Marketing Efficiency Ratio — also called Blended ROAS. Total revenue divided by total ad spend across all channels.

A MER of 2.5x means every $1 in ads returns $2.50 in revenue.

Why not just use Meta ROAS? Meta overcounts by 30–60% due to iOS privacy. MER uses actual revenue vs actual spend — no pixel needed.

Step by step

1
Enter gross margin — profit after product cost and shipping, before ads.
2
Enter total revenue from your sales platform. Use 30D as primary view.
3
Enter ad spend per channel and the ROAS each platform reports.
4
Hit Update Dashboard and read your MER, Net Profit, and Action Plan.
5
Repeat every Monday. 5 minutes. One source of truth.
ℹ Enter your numbers and hit Update Dashboard to calculate your MER (Blended ROAS).
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Platform ROAS is overcounting — here is the real picture
Enter This Period's Numbers manual · no pixel needed
Top-Line & Margin Inputs
 
Profit after product cost & shipping, before ads
—calculated from inputs
 
Breakeven MER
—
min to not lose money
Actual Net Margin
—
GM% minus ad spend %
Max Ad Spend %
—
of revenue before losses
Recommended to Scale
15–25% net
MER target: —
Enter GM to evaluate
Recommended Ad Budget
—
up to 35% of rev, capped by GM
Your Current Spend
—
all channels combined
Enter revenue and gross margin to see your recommended budget.
Per-Channel Spend & Reported ROAS
Owned channel — no ROAS
MER / Blended ROAS
—
Enter spend to calculate
Total Revenue
—
this period
Total Ad Spend
—
all channels
Gross Profit
—
after COGS, before ads
Net Profit (after Ads)
—
gross profit minus ad spend
Remaining Ad Budget
—
before breakeven
Channel Spend vs Revenue Attribution
ChannelSpend% of TotalReported ROAS
Spend Distribution
Your Action Plan
What Should I Do Next?
Budget Breakdown
Enter your numbers to see budget details.
MER — Marketing Efficiency Ratio (Blended ROAS)
Total Revenue divided by Total Ad Spend. Your real measure of ad profitability, not pixel-dependent.
Breakeven MER
1 divided by Gross Margin%. The minimum MER to cover cost of goods. Below this means losing money.
How to update
Every Monday: revenue from your sales platform plus spend from your ad accounts. 5 minutes.
This tool is free — and always will be.
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Have feedback or a feature request?
Reach me at adprofitchecker at gmail.com. I read every message.