Calculating Quarterback Rating
The definitive tool for NFL Passer Rating calculation and efficiency analysis.
NFL Passer Rating
111.8Component Breakdown
Weight of each scoring factor (Max 2.375 each)
What is Calculating Quarterback Rating?
Calculating quarterback rating (often referred to as the NFL Passer Rating) is a standardized method used to evaluate the passing performance of quarterbacks in American football. Unlike raw yardage totals, this metric focuses on efficiency, combining four distinct statistical components into a single number ranging from 0 to 158.3.
Who should use this? Coaches, fantasy football enthusiasts, and sports analysts rely on calculating quarterback rating to compare players across different eras and systems. A common misconception is that this rating accounts for rushing yards or sacks; however, it is strictly a measure of passing performance. For a broader look at performance, you might explore advanced qb statistics.
Calculating Quarterback Rating Formula and Mathematical Explanation
The math behind calculating quarterback rating involves four steps. Each step calculates a component (A, B, C, D) which is capped at a maximum of 2.375 and a minimum of 0.
- A (Completion Factor): ((Completions / Attempts) – 0.3) × 5
- B (Yards Factor): ((Yards / Attempts) – 3) × 0.25
- C (Touchdown Factor): (Touchdowns / Attempts) × 20
- D (Interception Factor): 2.375 – ((Interceptions / Attempts) × 25)
The final rating is: [(A + B + C + D) / 6] × 100.
| Variable | Meaning | Unit | Typical Range |
|---|---|---|---|
| Attempts | Total passes thrown | Count | 20 – 50 per game |
| Completions | Successful passes caught | Count | 60% – 70% of Att |
| Yards | Total passing yardage | Yards | 200 – 350 per game |
| TDs | Passing touchdowns | Count | 1 – 4 per game |
| INTs | Interceptions thrown | Count | 0 – 2 per game |
Practical Examples (Real-World Use Cases)
Example 1: The Elite Performance
Imagine a QB with 30 attempts, 25 completions, 350 yards, 4 TDs, and 0 INTs. This player has a high completion percentage and a perfect td-int ratio analysis.
Results: Component A: 2.375 (Capped), B: 2.16, C: 2.375 (Capped), D: 2.375. Final Rating: 154.8.
Example 2: The Average Outing
A QB throws 40 times, completes 24 for 240 yards, 1 TD, and 1 INT.
Results: Component A: 1.5, B: 0.75, C: 0.5, D: 1.75. Final Rating: 75.0.
How to Use This Calculating Quarterback Rating Calculator
- Enter the total Pass Attempts from the game or season.
- Input the total Completions. Ensure this is not higher than attempts.
- Add the total Passing Yards.
- Input the number of Touchdowns and Interceptions.
- The tool will automatically update the calculating quarterback rating and display the component breakdown chart.
Interpreting results: A rating above 100 is considered elite, while 85-95 is league average in the modern NFL. Monitoring yards per attempt is key to a high score.
Key Factors That Affect Calculating Quarterback Rating Results
- Completion Percentage: This is the foundation of efficiency. High volume with low accuracy heavily penalizes the rating.
- Yards Per Attempt: Unlike total yards, passing efficiency relies on how much gain is achieved per throw.
- Touchdown Ratio: Scoring frequency per attempt provides a massive boost to the final score.
- Interception Avoidance: Interceptions are the most heavily penalized factor in calculating quarterback rating.
- Statistical Caps: Each of the four components is capped at 2.375, meaning "perfect" stats in one area can't infinitely compensate for failures in another.
- Modern Passing Rules: Changes in defensive contact rules have historically inflated nfl passer rating figures compared to the 1970s.
Frequently Asked Questions (FAQ)
What is a perfect passer rating?
A perfect rating is 158.3. It requires high efficiency across all four statistical categories simultaneously.
Does rushing yardage count?
No, calculating quarterback rating only accounts for passing statistics. Rushing is excluded.
How does the NCAA rating differ?
The college formula is different, primarily because it doesn't cap individual components and uses a different scale where scores can exceed 200.
Why is 2.375 the cap?
The formula was designed in 1971 based on league averages at the time. 2.375 represents a performance exactly 100% above the then-average.
Does it account for sacks?
No, sacks are not included in the standard NFL passer rating formula, though they affect qb statistics like Adjusted Net Yards Per Attempt.
Can you have a 0.0 rating?
Yes. If a QB performs poorly enough across all four components to hit the minimum floor of 0 on each, the resulting rating is 0.0.
What is a good rating?
In the modern NFL, a season-long rating over 90 is solid, while over 100 is typically Pro-Bowl caliber.
Is passer rating the same as QBR?
No. Passer Rating is a public formula. Total QBR is a proprietary metric created by ESPN that includes rushing, sacks, and situational context.
Related Tools and Internal Resources
- NFL Passer Rating Guide – A deep dive into the history of the metric.
- Passing Efficiency Metrics – Learn about different ways to measure QB impact.
- Advanced QB Statistics – Going beyond the basic passer rating.
- Improving Completion Percentage – Training tips for young quarterbacks.
- TD-INT Ratio Analysis – Why ball security matters most.
- Yards Per Attempt Calculator – Focus on the most predictive passing stat.