Taper Calculator
Construction & Home ImprovementCalculate the taper rate and included angle of a tapered shaft or workpiece from its two diameters and length.
Taper per Foot
Change in diameter per foot of length, a common machinist taper specification.
Included Angle
5.725
Full included angle of the taper cone.
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Creators
Odeh Ahwal0people find this calculator helpful
Views
Helpful
Saved
Embeds
Construction & Home Improvement calculators
Frequently Asked Questions
What is taper per foot?
Taper per foot is the change in diameter over a 12 inch length, a standard way machinists specify tapers. It is found by dividing the total diameter change by the taper length, then scaling to a 12 inch reference length.
What is the difference between taper per foot and the included angle?
Taper per foot describes the diameter change directly, while the included angle describes the same taper as the full cone angle, useful for setting up a compound slide or comparing against a standard taper like a Morse taper. Both describe the same physical taper, expressed differently.
Does this work for both external and internal tapers?
Yes, the geometry is identical whether the taper is on the outside of a shaft or the inside of a bore, as long as the major and minor diameters and the taper length are measured consistently.
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