Where the clubface is pointing at impact. The primary factor in determining starting direction.
PGA Tour Avg
0.3° open
Amateur Avg
1.5° open
Face angle is the horizontal direction the clubface is pointing at the moment of impact, measured relative to the target line. Modern ball flight laws (proven by TrackMan in 2008) confirm that the clubface accounts for 75–85% of where the ball starts — not the swing path as previously taught for decades. If you want to know where the ball will start, look at face angle.
Face angle controls starting direction. If you want to stop slicing, you must square (or close) the face at impact. The most reliable way to fix shot direction is to first fix face angle, then adjust path to control curvature.
TrackMan iO measures face angle to within ±0.5° at the precise moment of impact using high-frequency dual radar. This is the gold standard for face measurement — used by tour pros and manufacturer R&D.
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