# Passer Rating Calculator (QB Rating)

LAST UPDATE: September 24th, 2020

## Definition – What is “QB Rating”?

Passer rating is a football statistic that evaluates a quarterback’s passing performance. The NFL, CFL, and NCAA football use it.

It is a mix of passing attempts, passing yards, completions, touchdown passes, and interceptions. The mixed statistic compares a quarterback’s ability with their peer’s.

The NFL’s statistical committee developed passer rating in the early 70s. It replaced an existing system.

The NCAA formula is different from the formula used by the NFL and CFL. Many high school statistics use the NCAA version.

## Formula – How to calculate Passer Rating

##### NFL and CFL formula:

a = ((completions ÷ passing attempts) – 0.3) x 5

b = ((passing yards ÷ passing attempts) – 3) x 0.25

c = (touchdown passes ÷ passing attempts) x 20

d = 2.375 – ((interceptions ÷ passing attempts) x 25)

If any of a, b, c, or d are less than ‘0’, then they calculated as 0.

If any of a,b,c, or d are more than 2.375, then they are calculated as 2.375.

Passer Rating = ((a + b + c + d) ÷ 6) x 100

##### NCAA Formula:

NCAA Passer Rating = ((8.4 x Passing Yards) + (330 x Touchdown Passes) + (100 x Number of Completions) – (200 x Interceptions)) ÷ Passing Attempts

There are no minimums or maximums in the NCAA passer rating formula.

### Example

A quarterback makes 659 passing attempts. They have 450 completions, pass for 5,477 yards,  make 55 touchdown passes, and have 10 interceptions.

##### NFL & CFL Formula Calculation

a = ((450 ÷ 659) – 0.3) x 5 = 1.914

b = ((5,477 ÷ 659) – 3) x 0.25 = 1.328

c = (55 ÷ 659) x 20 = 1.669

d = 2.375 – ((10 ÷ 659) x 25) = 1.996

Passer Rating = ((1.914 + 1.328 + 1.669 + 1.996) ÷ 6) x 100

Passer Rating = 115.12

Therefore, the quarterback’s passer rating in the NFL or CFL is 115.12.

##### NCAA Formula Calculation

NCAA Passer Rating = ((8.4 x Passing Yards) + (330 x Touchdown Passes) + (100 x Number of Completions) – (200 x Interceptions)) ÷ Passing Attempts

NCAA Passer Rating = ((8.4 x 5,477) + (330 x 55) + (100 x 450) – (200 x 10)) ÷ 659

NCAA Passer Rating = (46,006.8 + 18,150 + 45,000 – 2,000) ÷ 659

NCAA Passer Rating = 107,156.8 ÷ 659

NCAA Passer Rating = 162.61

Therefore, this QB’s passer rating in the NCAA is 162.61.