Walk onto any range and watch how golfers tee the ball up. Most push the peg into the ground to roughly the same depth every time, out of habit rather than thought, and then spend the rest of the session tinkering with grip pressure, alignment and tempo instead. It is one of the stranger blind spots in the game. Tee height is free, it takes no fitting appointment to change, and it has a bigger effect on how a driver performs than most of the things golfers actually pay to have adjusted.
The physics of it are not complicated, which is part of why it is so easy to overlook. A driver face is angled to produce spin and launch when it strikes the ball at a particular point relative to the centre of the clubhead. Tee the ball too low and even a well-struck drive gets caught on the lower part of the face, which adds spin, robs distance and often sends the ball on a lower, weaker flight than the swing itself deserves. Tee it too high and the same swing can catch the ball above the sweet spot, producing the kind of high, ballooning strike that loses distance in the opposite direction. Somewhere in between is a tee height that lets a golfer’s own swing put the ball where the clubface actually wants to meet it, and that spot is different for almost every player in the game.
Why the standard advice is only a starting point
The usual rule of thumb, tee the ball so roughly half the ball sits above the crown of the driver at address, is a reasonable place to begin and a poor place to stop. It assumes a fairly standard angle of attack, a shallow one on the way through impact, and plenty of golfers do not swing that way. Someone who sweeps the ball with a flat, shallow path through the hitting zone typically wants the ball teed a touch higher than that guideline suggests, because their low point through impact sits further back and their attack angle is close to level or slightly upward. Someone with a steeper swing, coming down more sharply into the ball, often benefits from teeing it a fraction lower, because a steep attack angle combined with a high tee height is a reliable way to catch the ball high on the face and lose ball speed doing it.
This is why the same fitting principle that gets applied to shaft flex and loft rarely gets applied to tee height, even though it should. A launch monitor session that adjusts loft and shaft but leaves tee height fixed throughout is only testing part of the equation. Move the tee up or down half an inch during that same session and the launch and spin numbers on the same club, the same shaft, the same swing, can shift meaningfully. Most club fitters know this. Not every amateur walking into a fitting bay thinks to ask about it.
Finding your own number
The practical way to find a better tee height without a launch monitor is to pay attention to where the ball is marked after impact, not where it lands. Spray a small amount of foot powder or use impact tape on the driver face for a handful of shots and look at where the strike mark sits relative to the centre of the face. Strikes that consistently show up low on the face suggest the tee is too low for that swing. Strikes that cluster high suggest the opposite. It takes ten or fifteen swings to get a genuine pattern, and the adjustment that follows, a small movement up or down, usually shows up immediately in strike quality even before it shows up on a scorecard.
It is also worth testing the extremes on purpose, at least once. Tee a ball unusually low and hit a few drives, then tee one unusually high and do the same. The difference in ball flight, spin and feel at the two ends of that range tells a golfer more about where their own swing wants the tee than any generic advice can, because it turns an abstract rule into something felt rather than read.
A cheap habit worth building
None of this requires new equipment, a fitting cart or a swing change. It requires a golfer to stop treating tee height as a formality and start treating it as the last variable in the launch equation, the one that gets decided fresh on every single tee shot and yet gets the least conscious thought of any of them. Shaft flex and head design cost money to change. Tee height costs nothing but attention, and for most amateurs it is sitting there unused, a genuine source of extra distance and better strikes that nobody has to buy.