How are quarterback ratings figured for the NFL?

Answer 1

Complicated formula (college rating formulas are slightly different)

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# Divide a quarterback's completed passes by pass attempts.
# Subtract 0.3.
# Divide by 0.2 and record the total. The sum cannot be greater than 2.375 or less than zero.
# Divide passing yards by pass attempts.
# Subtract 3.
# Divide by 4 and record the total. The sum cannot be greater than 2.375 or less than zero.
# Divide touchdown passes by pass attempts.
# Divide by 0.05 and record the total. The sum cannot be greater than 2.375 or less than zero.
# Divide interceptions by pass attempts.
# Subtract that number from 0.095.
# Divide that product by 0.04 and record the total. The sum cannot be greater than 2.375 or less than zero.
# Add the four totals you recorded.
# Multiply that total by 100.
# Divide by 6.
# The final number is your quarterback rating.

Answer 2

After reading the formula, all I can say is Jesus H. Christ.