Revolution count is how many revolutions your release applies to the ball. Similar to RPMs, but the factor of time is removed. Revolutions are sometimes calculated for the entire length of the lane. A full lane length revolution count can be misleading however because the ball's core design may cause the ball to create more revolutions as it slows down in friction. This is why the below calculation looks at the amount of revolutions for the first 15 feet of the lane.

• Use a low flare bowling ball such as a plastic or polyester bowling ball.
• Place a contrasting piece of tape from the positive axis point to above the fingers.
• Video tape your release from behind so that the ball from your release to the arrows is clearly visible.
• Replay the recorded video back using frame by frame viewing from the point of release. Keep note of where the piece of tape points.

Advance the video until the bowling ball reaches the third arrow while counting the number of times the tape revolves from the release point.

Enter the number of revolutions ( example 2.3, 3.5 )

Your revolution count =

Revolutions	Rate	Bowler Type
up to 11	Slower	Stroker
11 - 17	Medium	Tweener
more than 17	Faster	Cranker