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Calcimator

Green Reading Calculator

Calculate putt break, aim point, and speed adjustment based on slope, distance, and green speed (Stimpmeter).

Inputs

Results

Break Amount (inches)

24

Aim Point Offset (inches)24
Effective Distance (feet)20
Target Overshoot (inches)17
Elevation Change (inches)0
Side Slope (%)2
Break DirectionRight to Left
Speed AdviceNormal pace
How to Use This Calculator
  1. Enter the Putt Distance in feet.
  2. Set the Slope Grade in percent and Slope Direction in degrees (0 = directly uphill, 90 = side slope).
  3. Enter the Stimpmeter Speed (ball roll distance in feet from a standard ramp release).
  4. Review Break Amount in inches, Aim Point Offset, Effective Distance, and recommended Overshoot.
  5. Use Elevation Change and Side Slope to understand how combined slopes affect break.

How the result changes with Putt Distance (feet)

Putt Distance (feet)Break Amount (inches)
1113.2
3643.2
6578
90108

What each input means

Putt Distance (feet)
Distance from ball to hole in feet.
Slope Grade (%)
Slope steepness as a percentage. Most greens are 1-4%.
Slope Direction (degrees)
Direction of downslope relative to putt line: 0=uphill, 90=right-to-left, 180=downhill, 270=left-to-right.
Stimpmeter Speed (ft)
Green speed rating. Slow: 7-8, Medium: 9-10, Fast: 11-12, Tour: 12-14.

What each result means

Break Amount (inches)
Total break the ball will experience from side slope.
Aim Point Offset (inches)
How far to aim away from the hole to compensate for break.
Effective Distance (feet)
Putt distance adjusted for elevation — uphill plays longer.
Target Overshoot (inches)
How far past the hole to aim if the ball misses, adjusted for slope and speed.
Elevation Change (inches)
Total elevation change along the putt line.
Side Slope (%)
Cross-slope component affecting break.
Break Direction
Direction the putt will break.
Speed Advice
Recommended stroke pace based on slope.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Putt Distance (feet) = 20, Slope Grade (%) = 2, Slope Direction (degrees) = 90, Stimpmeter Speed (ft) = 10 = 4 input(s) provided
  2. Calculate Break Amount
    Break Amount = abs(sideComponent) * puttDistance * stimpFactor * gravityEffect
    24 = 24
  3. Calculate Aim Point Offset
    24 = 24
  4. Calculate Effective Distance
    Effective Distance = puttDistance * elevationFactor
    20 = 20

Engine last updated . Checked against 3 independently-derived tests — how we verify calculators.

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