Work out drilling time instantly with clear inputs, formula shown and shareable results.
Penetration rate is spindle speed times feed per revolution. Travel is the hole depth plus about 0.3 diameters for the drill point to break through, since the tip cone must clear the far face before the hole is complete.
Penetration rate
IPM = rpm x feed per revolution
Time per hole
T = (depth + 0.3 x diameter) / IPM
IPM = rpm x feed per revolution. Penetration rate is spindle speed times feed per revolution.
A standard 118 degree drill point is about 0.3 times the diameter deep. Without that allowance the calculated time is short and the hole is not fully through.
This calculator takes 4 inputs: Hole depth, Drill diameter, Spindle speed, Feed per revolution. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.