Every club has a different power curve. A Pangya Calculator uses specific "constants" for 1W, 2W, and 3W clubs to ensure the math matches your equipment.
The tilt of the ground where your ball currently sits, which affects the initial horizontal launch angle. pangya calculator
Hitting uphill requires more power, while hitting downhill can cause your ball to overshoot the green. Calculators factor in the "H" (Height) value to adjust your distance. Every club has a different power curve