Swing tempo calculator
Time your swing on video (frame count or stopwatch, in tenths of a second) and enter the two phases below. Tour average tempo is close to a 3:1 backswing:downswing ratio (source: published swing-tempo research, e.g. Tom Tomasello / trackable via most swing-analysis apps).
Swing history
Tempo research emphasizes consistency across swings, not a single good rep. Save each analyzed swing to track your ratio over time and see your real personal average.
No saved swings yet — analyze one above, then click "Save this swing".
Smash factor calculator
Smash factor is a real, standard club-fitting metric: ball speed divided by clubhead speed, a direct measure of strike efficiency (energy transfer at impact). Get both numbers from a launch monitor, swing-speed radar, or any app that reports them, then enter them below. Max efficient smash factor is limited by the physics of the collision (roughly 1.5 for a driver with modern COR rules) — higher isn't always better if it comes with a mis-hit launch angle, but it's a real, checkable number.
Smash factor history
Strike efficiency varies shot to shot more than swing tempo does. Save each analyzed shot to see your real average smash factor by club over time.
No saved shots yet — analyze one above, then click "Save this shot".
What's real here, what isn't yet
Both calculators above run entirely in your browser and give real, correct calculations — no fake numbers. Saved history (tempo and smash factor, separately) is stored only in this browser's local storage: no account, no server, nothing synced across devices, and "Clear saved history" really deletes it (there is no copy anywhere else). These are two narrow slices of the full "biomechanics analysis and computer-aided training" product named in this venture's spec, not the whole thing: full swing-plane video analysis, joint-angle tracking, and a coached training program are not built yet — those require pose-estimation input this account does not currently have wired up, so they aren't described as if they exist. This page will be extended as those pieces become real.