NFL Passer Rating Calculator
Total number of completed passes.
Total number of pass attempts.
Total yards gained from passing.
Total touchdown passes thrown.
Total interceptions thrown.
The four components of the rating are capped between 0 and 2.375.
What is the formula used to calculate rating in NFL?
The formula used to calculate rating in the NFL, officially known as the passer rating, is a metric designed to measure the performance of quarterbacks. It was adopted by the NFL in 1973 to provide a standardized way to compare passers. The formula consolidates five key statistics—completions, attempts, yards, touchdowns, and interceptions—into a single number on a scale from 0 to a perfect 158.3. This rating helps fans and analysts quantify a quarterback’s efficiency and effectiveness during a game or over a season. It is not to be confused with ESPN’s QBR, which is a different, more complex metric.
NFL Passer Rating Formula and Explanation
The passer rating formula is not a single, direct calculation but a multi-step process. It’s built on four separate calculations (referred to as components ‘a’, ‘b’, ‘c’, and ‘d’), each representing a different aspect of passing performance. Each of these components is capped, meaning its value cannot exceed 2.375 or be less than 0.
- Component A (Completion Percentage): `a = ((COMP / ATT) – 0.3) * 5`
- Component B (Yards per Attempt): `b = ((YDS / ATT) – 3) * 0.25`
- Component C (Touchdown Percentage): `c = (TD / ATT) * 20`
- Component D (Interception Percentage): `d = 2.375 – ((INT / ATT) * 25)`
After calculating the four components (and applying the 0 to 2.375 cap on each), they are summed, divided by 6, and multiplied by 100 to produce the final passer rating.
Final Formula: `Passer Rating = ((a + b + c + d) / 6) * 100`
| Variable | Meaning | Unit | Typical Range (for a good game) |
|---|---|---|---|
| COMP | Completions | Count | 20-30 |
| ATT | Attempts | Count | 30-45 |
| YDS | Passing Yards | Yards | 250-400 |
| TD | Touchdowns | Count | 2-4 |
| INT | Interceptions | Count | 0-1 |
Practical Examples
Example 1: A “Perfect” Game Performance
Let’s calculate the rating for a nearly perfect game, where a QB has 25 completions on 32 attempts for 400 yards, 4 touchdowns, and 0 interceptions. A perfect rating of 158.3 is rare but achievable.
- Inputs: COMP=25, ATT=32, YDS=400, TD=4, INT=0
- a (Completions): `((25/32) – 0.3) * 5 = 2.406` -> Capped at 2.375
- b (Yards): `((400/32) – 3) * 0.25 = 2.375`
- c (Touchdowns): `(4/32) * 20 = 2.5` -> Capped at 2.375
- d (Interceptions): `2.375 – ((0/32) * 25) = 2.375`
- Final Rating: `((2.375 + 2.375 + 2.375 + 2.375) / 6) * 100 =` 158.3
Example 2: An Average Game Performance
Now consider a more average stat line: 22 completions on 38 attempts for 240 yards, 1 touchdown, and 1 interception.
- Inputs: COMP=22, ATT=38, YDS=240, TD=1, INT=1
- a (Completions): `((22/38) – 0.3) * 5 = 1.395`
- b (Yards): `((240/38) – 3) * 0.25 = 0.829`
- c (Touchdowns): `(1/38) * 20 = 0.526`
- d (Interceptions): `2.375 – ((1/38) * 25) = 1.717`
- Final Rating: `((1.395 + 0.829 + 0.526 + 1.717) / 6) * 100 =` 74.5
How to Use This NFL Passer Rating Calculator
Using this calculator is straightforward. Just follow these steps to determine a quarterback’s passer rating based on their game statistics.
- Enter Pass Completions: Input the total number of passes the quarterback successfully completed to a receiver.
- Enter Pass Attempts: Input the total number of pass attempts thrown by the quarterback.
- Enter Passing Yards: Provide the total number of yards gained through the air.
- Enter Touchdowns: Input the number of touchdown passes thrown.
- Enter Interceptions: Input the number of passes that were intercepted by the defense.
- Review the Results: The calculator will instantly display the final NFL Passer Rating. You can also view the four individual components that contribute to the final score to see which areas of performance were strongest. For more on the components, see this {related_keywords}.
Key Factors That Affect the formula used to calculate rating in nfl
Several key performance indicators directly influence the passer rating. Understanding them is crucial to interpreting the final number.
- Completion Percentage: This is a primary driver. A higher completion percentage directly increases component ‘a’, boosting the overall rating. It shows accuracy and efficiency.
- Yards Per Attempt: This reflects a quarterback’s ability to produce big plays. A high Y/A increases component ‘b’. A QB can have a high completion percentage with short passes but a low Y/A, which will temper their rating. You can learn about {related_keywords} to see how this compares.
- Touchdown to Attempt Ratio: Scoring is heavily rewarded. A high percentage of touchdowns per attempt significantly boosts component ‘c’. This shows the ability to finish drives.
- Interception to Attempt Ratio: Ball security is critical. Throwing interceptions heavily penalizes the rating by lowering component ‘d’. A low interception rate is key to a high rating.
- Number of Attempts: While not a direct input, attempts form the denominator for all components. A small sample size (e.g., under 10-15 attempts) can lead to volatile and misleading ratings.
- The 2.375 Cap: Elite performance in one area cannot infinitely compensate for weakness in another. For example, an extremely high yards-per-attempt average won’t offset a high interception rate beyond a certain point because the yards component (‘b’) is capped. To read more about player stats, see this article on {related_keywords}.
Frequently Asked Questions
- 1. What is a perfect passer rating in the NFL?
- A perfect passer rating is 158.3. To achieve it, a quarterback must meet high minimums in completion percentage (77.5%), yards per attempt (12.5), and touchdown percentage (11.875%), while throwing zero interceptions.
- 2. Can a passer rating be negative?
- No. While the intermediate calculations can theoretically result in negative values, the formula specifies that any component result below zero is set to zero, making the lowest possible rating 0.
- 3. Is Passer Rating the same as ESPN’s QBR?
- No. Passer rating is a formula based only on raw statistics. Total Quarterback Rating (QBR) is a more complex metric created by ESPN that incorporates context like down, distance, game situation, and opponent strength.
- 4. Why is the maximum rating 158.3?
- The number 158.3 is a byproduct of the formula’s design. The four components are each capped at 2.375. If a QB achieves the maximum in all four, the calculation `((2.375 * 4) / 6) * 100` equals 158.3.
- 5. When was the passer rating formula created?
- The formula was developed by a special NFL committee and officially implemented in 1973 to create a standard for evaluating quarterback performance.
- 6. Does the rating account for rushing yards?
- No. The NFL passer rating strictly evaluates passing performance. It does not include any statistics related to a quarterback’s rushing or scrambling ability.
- 7. Does a higher passer rating always mean a better quarterback?
- Not necessarily. While it’s a very good indicator of passing efficiency, it doesn’t account for leadership, mobility, or performance in clutch situations. Some quarterbacks may have a lower rating but excel in other areas. See our analysis on {related_keywords} for more.
- 8. How are the component caps (0 and 2.375) determined?
- The caps were designed so that a statistically “average” performance (based on data from 1960-1970) would result in a component value of 1.0. The upper limit of 2.375 was set to reward excellent play without allowing one superlative stat to completely dominate the rating.