What it does
The Reach Ratio is a free calculator that helps you estimate how much of your target audience a given channel will actually reach, and what overlap exists between channels when you're running multi-channel campaigns.
Plug in your channel mix and it shows you how many unique people you're likely to reach versus how many impressions you're buying. Useful before you commit budget to a channel plan.
Why it matters
One of the most common planning mistakes in digital marketing is confusing impressions with reach. You can buy 2 million impressions and still only reach 40,000 unique people if your frequency cap is off or your audience is narrow.
This tool makes the math visible before you spend — so you can adjust your mix on a spreadsheet rather than discovering the problem in your post-campaign report.
How to use it
- Open the tool
- Enter your planned channels and rough impression volumes
- The calculator shows estimated reach and the overlap between channels
- Adjust until your unique reach number matches your campaign goal