1. What is GRP?

Gross Rating Points (GRP) measure the total audience delivery of an advertising campaign. It represents the sum of all ratings achieved by all spots in a campaign.

2. How Does the Calculator Work?

The calculator uses the GRP equation:

Where:

• \( Ad\ Spots \) — Number of advertising spots run
• \( Rating\ per\ Spot \) — Average percentage of target audience reached by each spot

Explanation: The equation multiplies the number of ad spots by their average rating, then sums these values across all spots in the campaign.

3. Importance of GRP Calculation

Details: GRP helps media planners compare the relative strength of different media schedules and estimate the overall reach and frequency of a campaign.

4. Using the Calculator

Tips: Enter the total number of ad spots and the average rating percentage per spot. Both values must be valid (spots > 0, rating between 0-100%).

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between GRP and TRP?
A: GRP measures total audience delivery, while TRP (Target Rating Points) measures delivery to a specific target audience.

Q2: What is a good GRP value?
A: This varies by campaign goals, but typically 100-300 GRPs per month are needed for effective frequency in TV campaigns.

Q3: How does GRP relate to reach and frequency?
A: GRP = Reach × Frequency. Higher GRPs can mean either broader reach or higher frequency to the same audience.

Q4: Can GRP be more than 100?
A: Yes, since it's cumulative across multiple spots. A GRP of 100 could mean 100% reach once or 50% reach twice, etc.

Q5: Are GRPs comparable across media types?
A: Generally yes, but effectiveness may vary as different media have different engagement levels.