Club Gapping

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Ground

Today

Temperature

°C

Altitude

m

Wind

Speed

km/h

Measured at

The altitude and temperature your SkyTrak numbers are calculated for.

Temperature

°C

Altitude

m

How it's calculated

Air. Air density comes from altitude and temperature (standard atmosphere, dry air). Carry changes by half the change in density: about +1.7% for every 300 m higher, and about the same for every 10 °C warmer.

Grass test. From your height, chest height is taken as 72% and a walking step as 41.5% (standard body proportions). Grass falls at roughly 1.5 m/s, so from chest height it is in the air for about a second; drift divided by that time is the wind near the ground. The wind is stronger higher up where the ball flies, so the app scales it to the usual 10 m wind of a weather report (about ×2 over short grass). For your height, one step of drift is about 6 km/h. Grass that falls faster or slower than assumed shifts this by up to a third.

Wind. Only the part blowing along the target line counts. Into the wind costs 1% per mph (0.62% per km/h), helping wind adds 0.5% per mph (0.31% per km/h). Woods react 20% less, wedges 20% more. Crosswind doesn't change the distance here.

Total. Roll-out stays the same in meters; Wet then takes off its own amount. Not included: humidity, a cold ball, firm or soft ground.

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Full-swing carry

Median carry, P20–P80 spread and gap to the next club, in meters. Tap a club for details.

Median carry on its P20–P80 spread (5+ shots)
Estimate, until 10 measured shots
Roll-out to total
Wet total
Gap to next club
Gap over 12 m
Spread bands overlap

Club Gapping

Today

Measured at

Full-swing carry

Wedge matrix

Log range shots

This session

Import from SkyTrak

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Your bag

Out of the bag

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