Golf Sidekick explains Paul Runyan's classic Rule of 12 chipping formula to help golfers select the correct club based on landing spot ratios. The tutorial demonstrates setup tweaks like heel-up posture to eliminate turf snags and shows how to adjust the formula for uphill, downhill, and varying green speeds.
Calculate the ratio of landing-spot-to-hole distance divided by ball-to-landing-spot distance, then subtract that ratio from 12 to identify the club.
Adopt a heel-up, toe-down stance with handle raised and putter grip to prevent the heel catching the turf.
Adjust the base number higher (rule of 13 or 14) for downhill slopes and fast greens, requiring higher lofted clubs.
Lower the base number (rule of 11, 10, or 9) for uphill slopes and slow greens to account for extra resistance.
Factor in slope elevation gain at roughly one foot of extra distance per inch of elevation.
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