Weather & Altitude Distance Adjuster

Elevation: positive is downhill to the green, negative is uphill.

Air density drives the altitude and temperature effect; the exponent is calibrated to the accepted rules of thumb — about 2% more carry per 1,000 feet, roughly 10% at Denver's 5,280 — and verified in this site's tests. Wind follows the caddie rule that a headwind hurts about twice as much as a tailwind helps, and elevation plays about a yard per three feet. These are planning numbers: spin, launch and how flush you catch it all move the real result more than any chart.

A headwind costs twice what a tailwind gives back

The ratio is exactly 2:1 at every speed, and it is aerodynamics rather than a rounding convenience. A headwind raises the airspeed over the ball, increasing both lift and drag — it climbs, slows and drops steeply. A tailwind lowers airspeed and takes the lift away along with the drag, so the ball flies flatter and gains less than the arithmetic suggests. Which means a hole played out and back in a steady 10 mph breeze is a net loss of 7.5 yards — 5% of the shot. The wind never pays you back. It scales with the shot too, so it hurts most on the clubs you already hit least reliably. The practical version: into the breeze, under-clubbing costs double what over-clubbing does.

Thin air is thin air, whether from height or heat

Watch the third column. The familiar "2% per thousand feet" is right at the bottom and understates it higher up, because density falls faster than linearly with height. The bonus accelerates — which is the opposite of the obvious guess, and worth knowing if you play a mountain course. Temperature feeds the same calculation. A hundred-degree day at sea level plays like 2,091 feet of altitude on a standard one: 41 degrees of heat buys two thousand feet of mountain. And the cold is the quiet one. A 40°F round costs 2% — enough to cancel a thousand feet of altitude exactly, and a full club on a long iron. Nobody adjusts for it, because altitude announces itself and temperature does not. Height is still the bigger lever by a distance: Denver beats the hottest day you will ever play in.

Elevation is the one honest number, and the one most ignored

Uphill and downhill play at one yard per 3 feet. Unlike everything above, that is straight geometry rather than a rule of thumb about air — it is exactly symmetric, and it does not scale with the shot. A thirty-foot drop is ten yards whether you have a wedge or a hybrid in your hand. It is also the term golfers most often skip, because the eye is poor at judging vertical distance across a hundred yards of ground. A green that looks slightly below you is frequently thirty feet down.

Stack them and they compound. A 150-yard shot in Denver at 90°F, downwind 10 mph, dropping 20 feet to the green plays 114 — 36 yards short, comfortably more than two clubs. Every term happens to push the same way, which is how a familiar yardage becomes an unfamiliar shot.