Attack angle in golf: up, down, what it buys

One angle, measured against the horizon

TrackMan defines attack angle as the vertical direction of the club head's geometric centre movement at maximum compression. At the instant the ball sits flattest against the face, the head is either still descending or already climbing. Down is negative, up is positive, and the number describes that instant alone.

The reference is the horizon, not your shaft and not the plane you swing on, so a delivery that looks steep from down the line is a separate observation. Andrew Rice, of Berkeley Hall Golf Club, calls attack angle the king of the parameters in TrackMan's write-up: it plays a significant role, he says, in determining club path and the quality of the strike.

The tour numbers, club by club

-0.9° and +2.8°Driver attack angle, PGA and LPGA Tour averages 2023

TrackMan's 2023 averages put the PGA Tour driver at minus 0.9 degrees, off 115 mph of club speed and 282 yards of carry, from more than 40 events and 200 players. The men's tour average driver arrives on the way down. The LPGA Tour average is plus 2.8 degrees, off 96 mph and 223 yards. The tour hitting up on it is the slower one by nearly twenty miles an hour.

Below the driver both sets steepen as the clubs shorten. The PGA Tour irons run from minus 2.5 with a 3-iron through minus 3.4, minus 3.9 and minus 4.7 at the pitching wedge, each one steeper than the last. The LPGA irons do the same from minus 1.7 with a 4-iron down to minus 3.2, where the 9-iron and the wedge tie. Only the hybrids break the order, in either set.

Why the driver gets the opposite instruction

The rule TrackMan publishes is written by lie rather than by golfer. Shots hit off the ground should have a negative attack angle, while getting the most out of a driver requires hitting up on the ball. Nothing in that rule refers to the swing. The lie decides the sign.

Low point explains the asymmetry. A positive attack angle means the arc bottomed out before the ball, and on turf a head that is already climbing has its leading edge above the ball's equator when it arrives, so the strike thins. A tee lifts the ball into the space where a climbing head still finds the middle of the face. Steeper is no bargain either: TrackMan cautions slower club speeds against hitting too far down, at a cost in distance and in control into greens.

What a degree is worth in carry

About 2 yardsCarry per degree of attack angle, driver at 100 mph

Foresight Sports publishes a table of suggested driver launch conditions by swing speed, built from robot testing by Golf Laboratories. Along the 100 mph row, carry runs 244 yards at minus 2 degrees, 248 at zero and 254 at plus 3: two yards a degree, evenly spaced. The 65 mph row moves only from 132 to 138 across those same five degrees.

Each column carries its own launch and spin, which is the part the headline hides. Spin along that 100 mph row falls from 2,750 rpm at minus 2 degrees to 2,375 at plus 3, and launch angle climbs from 11.3 degrees to 14.5. Fredrik Tuxen, who invented TrackMan, gives the wider version: at 90 mph, minus 5 degrees wants about 10 degrees of launch and 3,100 rpm, plus 5 degrees wants 16 and 2,200 rpm, and the second combination carries almost 30 yards further.

Low point is the same event in other units

TrackMan puts it in one line on its low point page: low point provides a different way of describing attack angle. One reports an angle in degrees, the other a distance, from the club head's geometric centre to the lowest point on the swing arc. Positive means the arc bottomed out before impact, negative after it.

Both units are useful in different rooms. Degrees compare between clubs and between players; a distance in front of the ball is something you can picture standing over it, and how far ahead a tour player's sits belongs to the low point guide. Mark Anderson, of Philadelphia Cricket Club, lists what moves either number for TrackMan: ball position, movement of the swing centre, and where the hands and shaft are at impact.

What a camera cannot give you

1.2 degreesScratch to bogey, male amateur driver attack angle

Attack angle is defined at maximum compression, the instant TrackMan uses to stand for impact, which is why the number comes off a launch monitor pointed at the club head rather than out of a video. Pebble Swing reads joint angles out of your frames and the backswing-to-downswing tempo ratio out of the motion; it cannot produce an attack angle, and no phone-based system can.

TrackMan's Combine data argues against chasing decimal places. Male amateur driver averages run minus 0.9 degrees at scratch, minus 1.1 at 5 handicap, minus 1.2 at 10, minus 1.8 for the average golfer at 14.5 and minus 2.1 for a bogey golfer. That ladder spans 1.2 degrees, and its top rung matches the PGA Tour driver average exactly. An earlier TrackMan chart, still up on the company's Japanese blog, had that tour driver figure at minus 1.3.