How to use this tool
Replace the example values with your own inputs. Results update as you type. Keep your measurement period and definitions consistent, then use the result to inform the next question in your advertising review.
The formula
CPM = ad spend ÷ impressions × 1,000.
Worked example
1,000 spent on 100,000 impressions gives a CPM of 10.
What the result can tell you
Use the same date range, currency and attribution window for every input. Results are calculations, not a forecast of campaign performance.
Is it free, and where do my inputs go?
The tool runs in your browser without an account or an ad-platform connection. Calculation inputs are not sent to WhatWins. If you save a scenario, it stays in this browser on this device.