Calculate OTS from GRP and reach, gross contacts and net reach, or find required GRP for target frequency and planned impressions.
- All Business Calculators
- Reach And Frequency Calculator
- CPT (Cost Per Thousand) Calculator
- GRP (Gross Rating Points) Calculator
- Cost Per Rating Point (CPRP) Calculator
OTS (Opportunity-to-See) Formula
The calculator runs three modes. Each one returns the average number of times a reached person sees the ad, or the GRP needed to hit a target frequency.
OTS = GRP / Reach%
OTS = Gross Contacts / Net Reach
Required GRP = Desired OTS * Reach%
- OTS: opportunity to see, the average frequency per reached person
- GRP: gross rating points (or TVR for a single market)
- Reach%: percentage of the target audience reached at least once
- Gross Contacts: total impressions delivered across the schedule
- Net Reach: unduplicated people reached at least once
- Desired OTS: planned average frequency
The first mode (GRP + Reach) is the standard TV planning formula. The second mode (Gross + Net) works when you have raw impression and unique-user counts from digital or cross-media reports. The third mode (Plan Delivery) inverts the formula to tell you how many GRPs you must buy to hit a frequency goal, and optionally converts that into impressions when you supply the audience size.
Reference Tables
Use these as quick benchmarks when you read the result.
| OTS Range | Interpretation | Typical Use |
|---|---|---|
| 1 to 3 | Light exposure | Reminders, retargeting, known brands |
| 4 to 6 | Moderate frequency | Mainstream campaigns, line extensions |
| 7 to 12 | Strong recall zone | New products, complex messages |
| 13+ | Possible over-frequency | Check for wear-out and waste |
| GRP | Reach 40% | Reach 60% | Reach 80% |
|---|---|---|---|
| 100 | 2.5 | 1.7 | 1.3 |
| 300 | 7.5 | 5.0 | 3.8 |
| 500 | 12.5 | 8.3 | 6.3 |
| 800 | 20.0 | 13.3 | 10.0 |
Worked Examples and FAQ
Example 1. A TV flight delivers 420 GRPs and reaches 70% of the target. OTS = 420 / 70 = 6.0. Each reached viewer sees the ad about six times.
Example 2. A digital campaign serves 12,000,000 impressions to 2,500,000 unique users. OTS = 12,000,000 / 2,500,000 = 4.8 average exposures per user.
Is OTS the same as frequency? Yes. OTS is the average frequency among people who were reached at least once. Some markets use the term OTS for press and outdoor, and frequency for broadcast, but the math is identical.
Should reach be entered as 65 or 0.65? Either works. Use the dropdown to switch between percent and proportion. The calculator converts proportions to a percentage internally.
Why does OTS go up when reach drops? Holding GRPs constant, fewer unique people absorb the same total impressions, so each one sees the ad more times. To raise reach you usually need new dayparts, new channels, or a wider daypart mix rather than more spots in the same slots.
What is a good OTS target? The classic effective frequency range is 3 to 10, with 7 to 12 used for new product launches and complex messages. Established brands often plan toward 3 to 5. Check the table above against your campaign type before committing a budget.
