I thought the calibration thing was a thing you putt on the mat, not a chart!
Anyway, nice to have. Here's the same measurements in meters (directly converted using Google):
Setting Incline Boomerang Putt Equivalent Flat Distance*
Level 1 9cm 2.5m = 45cm ramp + 2.05cm roll 4.10m
Level 2 11.5cm 3.1m = 45cm ramp + 2.65m roll 5.3m
Level 3 13.5cm 3.5m = 45cm ramp + 3.05 roll 6.1m
Level 4 15cm 3.8m = 45cm ramp + 3.35m roll 6.8m
Level 5 17cm 4.1m = 45cm ramp + 3.65m roll 7.3m
Level 6 18cm 4.4m = 45cm ramp + 3.95m roll 7.9m