Smash Factor is ball speed divided by club speed.
Smash Factor relates to the amount of energy transferred from the club head to the golf ball.
The higher the smash factor the better the energy transfer.
A golfer would hope to achieve a smash factor near 1.50 on driver shots.
That means for a 100 mph club speed the ball speed would be 150 mph. The higher the loft of the club, the lower the smash factor is expected to be. A PW should have a smash factor near 1.25.
DRIVER EXAMPLE Golfer A has a club speed of 100 mph and a smash factor of 1.40. Golfer A’s ball speed is 140 mph.
Golfer B has a club speed of 100 mph and a smash factor of 1.50. Golfer B’s ball speed is 150 mph.
The 10 mph difference in ball speed between Golfer A and Golfer B equates to approximately 20 yards in distance between the two golfers even though they have the same club speed.