Calculators
Trigonometry Calculator (Right Triangle)
Enter any two of the sides or the angle of a right triangle and get the rest — the everyday shop trig for angled features, tapers, and layout.
Last verified: 2026-07-09
Most shop trig is a right triangle: an angled cut, a taper, a hole offset. Enter any two known values — the opposite side, adjacent side, hypotenuse, or the angle — and the calculator solves the rest.
Enter any two values. a = opposite side, b = adjacent side, c = hypotenuse, A = the angle opposite a.
Side a
3
Side b
4
Hypotenuse c
5
Angles
36.87° / 53.13°
Frequently asked
- Which side is which?
- Relative to angle A: side a is opposite it, side b is adjacent to it, and c is the hypotenuse (the longest side, opposite the 90° corner). The other acute angle B is simply 90° − A.
- Can I use it for tapers and angles?
- Yes — enter the rise and run as the two legs to get the included angle, or enter an angle and one side to get the offsets.
Sources
- Right-triangle trigonometry (Pythagoras + sine/cosine/tangent)