# How to Calculate Quarterback Passer Rating

The NFL rates its passers for statistical purposes against a fixed performance standard based on statistical achievements of all qualified pro passers since 1960. The current system replaced one that rated passers in relation to their position in a total group based on various criteria.

The current system, which was adopted in 1973, removes inequities that existed in the former method and, at the same time, provides a means of comparing passing performances from one season to the next.

It is important to remember that the system is used to rate passers, not quarterbacks. Statistics do not reflect leadership, play-calling, and other intangible factors that go into making a successful professional quarterback.

## Steps

- 1
**Use these four categories to compile a rating:**- Percentage of completions per attempt
- Average yards gained per attempt
- Percentage of touchdown passes per attempt
- Percentage of interceptions per attempt

- 2
**Know that the average standard is 1.000 and the bottom is .000.**To earn a 2.000 rating, a passer must perform at exceptional levels, i.e. 70 percent completions, 10 percent in touchdowns, 1.5 percent in interceptions, and 11 yards average gain per pass attempt. The maximum a passer can receive in any category is 2.375.- To gain a 2.375 in completion percentage, a passer would have to complete 77.5 percent of his passes. The NFL record is 70.55 by Ken Anderson (Cincinnati, 1982).
- To earn a 2.375 in percentage of touchdowns, a passer would have to achieve a percentage of 11.9. The record is 13.9 by Sid Luckman (Chicago, 1943).
- To gain 2.375 in percentage of interceptions, a passer would have to go the entire season without an interception. The 2.375 figure in average yards is 12.50, compared with the NFL record of 11.17 by Tommy O'Connell (Cleveland, 1957).

- 3
**In order to make the rating more understandable, the point rating is then converted into a scale of 100.**In rare cases, where statistical performance has been superior, it is possible for a passer to surpass a 100 rating.

## Tips

- If you are having trouble calculating percentages, look here.
- This same formula can be used to determine a passer rating for any player who attempts at least one pass.

## Article Info

Categories: Fans of Football