CPM Calculator
Free CalculatorTurn your ad spend and impressions into cost per 1,000 impressions and cost per impression β instantly and privately.
100% private
Runs in your browser β no numbers leave your device.
Your numbers
Total ad spend for the campaign or period.
Impressions bought in the same period.
CPM (cost per 1,000)
US$2.5
Cost per 1,000 impressions β the standard rate you use to compare media buys.
Cost per impression
US$0.0025
CPM Γ· 1,000 β what a single impression costs you.
How it works
Enter ad spend
Add the total you paid for the campaign or placement.
Add impressions
Enter the impressions delivered over the same period.
Read your CPM
Cost per 1,000 impressions updates live as you type.
Compare ad costs
Use CPM to benchmark campaigns, channels and placements.
Turn more impressions into installs
Reverze rebuilds your App Store screenshots into higher-converting creative β more installs from the same ad spend.
What is a CPM calculator?
A CPM calculator turns ad spend and impressions into cost per mille β the price you pay for every 1,000 ad impressions. Because it normalises cost to a per-thousand rate, CPM is the standard way to compare the price of media buys across campaigns, channels, placements and geographies, no matter how many impressions each one delivers. The formula is simple: divide total ad spend by impressions, then multiply by 1,000.
CPM is more useful than raw spend because it strips out volume: a campaign costing Β£500 for 200,000 impressions has a Β£2.50 CPM, and you can line that up directly against any other buy running at a different scale. This tool also shows cost per single impression for fine-grained budgeting β and once you know what your impressions cost, higher install conversion from better App Store creative lowers your effective cost per install on every impression you buy.