How Are NFL Quarterback Ratings Calculated?

The National Football League (NFL) quarterback rating is a statistic used to evaluate the performance of quarterbacks in a game. It's a composite score that takes into account multiple aspects of a quarterback's performance, including completions, attempts, yards, touchdowns, interceptions, and fumbles. Let's break down how this rating is calculated.

Components of the Quarterback Rating

The quarterback rating is calculated using four main categories:

1. Completion Percentage: This measures the number of completed passes out of the total number of pass attempts. A higher completion percentage generally indicates better accuracy and decision-making.
2. Yards per Attempt: This is calculated by dividing the total number of yards gained through passing by the total number of pass attempts. It reflects the quarterback's ability to move the ball down the field efficiently.
3. Touchdown Percentage: This metric looks at the number of touchdowns scored through passing divided by the total number of pass attempts. It highlights the quarterback's ability to score points.
4. Interception Percentage: This measures the number of interceptions thrown by the quarterback divided by the total number of pass attempts. A lower interception percentage is generally desirable as it indicates fewer mistakes.

Calculation of the Rating

The quarterback rating is calculated using a formula that assigns weights to each of the above categories and combines them into a single score. Here's the formula:

Rating = ((Completion Percentage + Yards per Attempt + Touchdown Percentage * 200 - Interception Percentage * 100) / 6) * 100

Let's break down the formula:

• Completion Percentage: This is taken as is, without any modification.
• Yards per Attempt: Also taken as is.
• Touchdown Percentage: This is multiplied by 200 to give touchdowns a higher weight in the overall rating.
• Interception Percentage: This is multiplied by -100 to penalize the quarterback for interceptions.

The sum of these four values is then divided by 6 and multiplied by 100 to arrive at the final quarterback rating.

Interpreting the Rating

The resulting quarterback rating is a number that typically ranges from 0 to 158.3 (the theoretical maximum). The higher the rating, the better the quarterback's performance in that particular game. A rating of 100 is considered average, while ratings above 120 are generally considered excellent.

It's important to note that the quarterback rating is just one metric used to evaluate quarterbacks. Other factors, such as leadership, decision-making, and the ability to read the defense, are also crucial in assessing a quarterback's overall performance.

Conclusion

The NFL quarterback rating is a comprehensive statistic that takes into account multiple aspects of a quarterback's game. By using a weighted formula, it provides a numerical representation of a quarterback's performance in a given game. While it's not a perfect measure, it's a valuable tool for analyzing and comparing quarterbacks in the NFL.