Smash Index
A normalized percentage comparing your smash factor to the maximum expected for your club speed.
Full Definition
Smash Index is a TrackMan metric introduced in 2025 that expresses your smash factor as a percentage of the theoretical maximum for your specific club and club speed. A Smash Index of 100% means perfect energy transfer. Unlike raw smash factor, which has different optimal values for different clubs, Smash Index provides a consistent 0-100% scale across all clubs, making it easy to assess strike quality at a glance.
Formula
Optimal RangeGeneral guidance based on tour averages. Your optimal range depends on swing speed, physical attributes, and individual technique. Many golfers succeed with metrics outside these ranges.
90-100% across all clubs
Why It Matters
Smash factor benchmarks differ by club (1.50 for driver, 1.35 for 7-iron, etc.), so a raw number alone doesn't tell you how well you struck it. Smash Index normalizes this—90%+ means you're striking it well regardless of club. It's a quick diagnostic for strike quality consistency across your bag.
Related Terms
Smash Factor
The ratio of ball speed to club speed, measuring energy transfer efficiency.
Ball Speed
The speed of the ball immediately after impact with the clubface.
Club Speed
How fast the clubhead is moving at impact, measured in mph.
Impact Offset
The horizontal distance from the center of the clubface to where the ball was struck (toe-heel).
Impact Height
The vertical distance from the center of the clubface to where the ball was struck (high-low).