Become a Member
Guides and Reports
Show All »
Metrics & ROI
Search Engine Marketing
More Marketing Topics »
MarketingProfs Enterprise Solutions
See All »
Schedule of Events
Virtual Conference Series
Products and Services
Post a Question
Quick Start Guide
Find and Post Jobs
Real-World Education for Modern Marketers
Join Over 600,000 Marketing Professionals
Ask your question ... sign up today! It's FREE!
Just for Fun
Search more Know-How Exchange Q&A from Marketing Experts
This question has been answered, and points have been awarded.
Calculating Reach, Frequency And Grp For A Campain
Posted by Anonymous on
9/28/2010 at 5:00 PM ET
Hi, if I am putting together a campaign sing multiple media I understand I need to calculate the GRP for each separate item ie tv, reach 50 frequency 3 GRP 150 and magazine reach 40 frequency 4 GRP = 160. How do I then present this information for the total campaign do I leave the information separate for each media type or add it together in some way to present a final calculation? Many THanks
10/1/2010 at 4:50 PM
You *can* combine GRPs, but it's not typically done ... and it's very difficult to even estimate combined reach or combined frequency because there is very little hard data about overlaps. ("Of the people who see my TV ad, how many also read the print media I'll be using?")
Theoretically, you could calculate the extremes: everyone who sees a print ad also sees the TV ad, so the GRPs only contribute to frequency, not reach; and everyone who sees a print ad is a different person from everyone who sees a TV ad, so GRPs contribute only to reach, not frequency.
What you have to be sure of is that the base size for your GRPs is the same. Remember that GRPs are based on a percentage (i.e., reach = % of population you reach). If the "population" is different for different media, then you can't really combine GRPs. That's why it isn't usually done.
There are algorithms that some large agencies use that will estimate combined GRPs, but they're pretty flaky, and many sophisticated clients won't look at them.
Hope this helps. There may be a media maven here who can do a better job of answering this question than I did! :)
BACK TO TOP
Post a Comment
YouTube Film School for Marketers: The Scrappy Upstart's Cheat ...
by Lena Brooks
Five Simple but Often Overlooked Ways to Boost Your Email ...
by Meera Kothand
The Most Effective Digital Lead Generation Channels
by Ayaz Nanji
PR People: Focus on These Five Areas Instead of Branding
by Kate Lobel
Six Essentials for Good Storytelling—and Great Content ...
by Jennifer Smoldt
See more marketing articles »
MarketingProfs uses single
sign-on with Facebook, Twitter, Google and others to make subscribing and signing in easier for you. That's it, and nothing more! Rest assured that
provide your social data to 3rd parties
contact friends on your network
post messages on your behalf
interact with your social accounts
Your data is secure with