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.