qb rating calculator

Calculate the official NFL Passer Rating using this professional QB Rating Calculator. Enter game or season statistics to see efficiency metrics.

Metric Component	Raw Value	Formula Score	Max Possible
Completion Factor	66.67%	1.833	2.375
Yards Factor	8.33 Y/A	1.333	2.375
Touchdown Factor	6.67%	1.333	2.375
Interception Factor	0.00%	2.375	2.375

The QB Rating Calculator uses these four weighted components to generate the final score.

What is a QB Rating Calculator?

A QB Rating Calculator is a specialized tool used to determine the passing efficiency of a quarterback in American football, specifically following the NFL's formula established in 1973. Unlike simple statistics like total yards or touchdowns, the QB Rating Calculator provides a standardized metric that balances four key areas of passing performance: accuracy, yardage per attempt, scoring ability, and ball security.

Who should use it? Coaches, scouts, fantasy football enthusiasts, and sports analysts rely on the QB Rating Calculator to compare players across different eras and teams. A common misconception is that the passer rating is a "grade" out of 100. In reality, the maximum possible rating is 158.3, and a "good" rating is typically anything above 90.0.

QB Rating Calculator Formula and Mathematical Explanation

The math behind the QB Rating Calculator involves four distinct steps. Each step calculates a "factor" based on specific passing statistics. These factors are capped at a maximum of 2.375 and a minimum of 0.0 to prevent a single outlier stat from skewing the entire rating.

The Four Components

• Completion Factor (A): Measures accuracy. Formula: ((Completions / Attempts) – 0.3) × 5
• Yards Factor (B): Measures explosiveness. Formula: ((Yards / Attempts) – 3) × 0.25
• Touchdown Factor (C): Measures scoring efficiency. Formula: (Touchdowns / Attempts) × 20
• Interception Factor (D): Measures ball security. Formula: 2.375 – ((Interceptions / Attempts) × 25)

Variable	Meaning	Unit	Typical Range
ATT	Pass Attempts	Count	20 – 50 per game
COMP	Completions	Count	12 – 35 per game
YDS	Passing Yards	Yards	150 – 400 per game
TD	Touchdowns	Count	0 – 5 per game
INT	Interceptions	Count	0 – 3 per game

The final result of the QB Rating Calculator is found by summing these four factors, dividing by 6, and multiplying by 100: Rating = [(A + B + C + D) / 6] × 100.

Practical Examples (Real-World Use Cases)

Example 1: The "Perfect" Game

Imagine a quarterback goes 10 for 10, for 150 yards, 2 touchdowns, and 0 interceptions. Using the QB Rating Calculator:

• Comp %: 100% (Factor A = 2.375 max)
• Yds/Att: 15.0 (Factor B = 2.375 max)
• TD %: 20% (Factor C = 2.375 max)
• INT %: 0% (Factor D = 2.375 max)
• Result: 158.3 (The Perfect Passer Rating)

Example 2: A Standard Professional Performance

A quarterback completes 22 of 35 passes for 260 yards, 1 touchdown, and 1 interception. Inputting these into the QB Rating Calculator:

• Comp %: 62.8% (Factor A = 1.64)
• Yds/Att: 7.42 (Factor B = 1.10)
• TD %: 2.85% (Factor C = 0.57)
• INT %: 2.85% (Factor D = 1.66)
• Result: 83.0 (A league-average performance)

How to Use This QB Rating Calculator

1. Enter Attempts: Type the total number of passes thrown in the "Pass Attempts" field.
2. Enter Completions: Input the number of successful catches in the "Completions" field. Ensure this is not higher than attempts.
3. Input Yardage: Enter the total passing yards gained.
4. Add Scoring/Errors: Enter the number of Touchdowns and Interceptions.
5. Review Results: The QB Rating Calculator updates in real-time. Look at the large blue number for the final rating.
6. Analyze Components: Check the table and chart below the result to see which area (e.g., Interceptions or Yards) is helping or hurting the rating most.

Key Factors That Affect QB Rating Calculator Results

Several nuances influence how the QB Rating Calculator interprets data:

• The 0.3 Floor: In the completion factor, anything below 30% completion results in a 0 for that component.
• The 3.0 Yard Floor: If a quarterback averages less than 3 yards per attempt, the yardage factor becomes 0.
• The 2.375 Cap: This is critical. If a QB has a 90% completion rate, the QB Rating Calculator treats it the same as a 77.5% rate because of the mathematical cap.
• Volume vs. Efficiency: The rating is purely an efficiency metric. A QB who goes 1/1 for 80 yards and a TD will have a higher rating than one who goes 30/40 for 350 yards and 3 TDs.
• Interception Weight: Interceptions are heavily penalized. A single interception can drop a rating by 15-20 points in a standard game.
• Lack of Context: The QB Rating Calculator does not account for sacks, rushing yards, or fumbles, which are significant parts of modern quarterback play.

Frequently Asked Questions (FAQ)

1. What is a "perfect" passer rating?

A perfect rating is 158.3. It requires meeting or exceeding the 2.375 cap in all four statistical categories.

2. Can a passer rating be zero?

Yes. If a quarterback performs poorly enough in all categories (e.g., many interceptions, very low completion percentage), the QB Rating Calculator will return a 0.0.

3. Is this the same as the NCAA passer rating?

No. The college (NCAA) formula is different and does not have a cap at 158.3. College ratings often exceed 200.

4. Does the QB Rating Calculator include rushing yards?

No, the traditional NFL passer rating only considers passing statistics. For a metric that includes rushing, look at ESPN's Total QBR.

5. Why is the maximum 158.3 and not 100?

The number is a result of the specific weights (5, 0.25, 20, 25) and the division by 6. It was designed so that an "average" performance in the 1970s would equal roughly 66.6.

6. How many attempts are needed for a valid rating?

While the QB Rating Calculator works for any number of attempts, the NFL requires a minimum number of attempts (usually 14 per team game) to qualify for official season leaderboards.

7. Do "throwaways" count against the rating?

Yes. Any pass attempt that is not a completion, including spikes and throwaways, lowers the completion percentage in the QB Rating Calculator.

8. Does a dropped pass affect the rating?

Yes, the QB Rating Calculator only sees the final result (incomplete), regardless of whether the fault was the quarterback's or the receiver's.