Right Triangles
Solve right-angled triangles using the Pythagorean theorem and trig ratios.
Right Triangle Calculator
Solve any right triangle from any 2 known values — sides, angles, area, perimeter.
Open calculatorPythagorean Theorem Calculator
Find any missing side using a² + b² = c².
Open calculatorSpecial Right Triangles
30-60-90 and 45-45-90 triangles solved by their fixed ratios.
Open calculatorSOHCAHTOA Calculator
Solve right triangles using the SOH-CAH-TOA trig ratios.
Open calculatorAny Triangle (Oblique)
Triangles without a right angle — solved with Law of Sines and Law of Cosines.
Triangle Solver
Solve SSS, SAS, ASA, or AAS — any triangle from 3 known measurements.
Open calculatorLaw of Sines Calculator
For ASA, AAS, and SSA — including the ambiguous case.
Open calculatorLaw of Cosines Calculator
For SSS and SAS triangles where you have all 3 sides or 2 sides + included angle.
Open calculatorTriangle Area Calculator
Three methods: base × height, Heron's formula, and SAS trig.
Open calculatorTriangle Perimeter Calculator
Perimeter, semiperimeter, area, and angles from 3 sides.
Open calculatorTriangle Height Calculator
Find the altitude from area + base, three sides, or SAS.
Open calculatorHeron's Formula Calculator
Triangle area from just the three side lengths — no heights needed.
Open calculatorSpecial Triangle Shapes
Triangles with special properties.
Trig Functions
Sine, cosine, tangent, and their inverses for any angle.
Sin Cos Tan Calculator
All six trig functions for any angle in degrees or radians.
Open calculatorInverse Trig Calculator
Find an angle from its sin, cos, or tan value (arcsin/arccos/arctan).
Open calculatorUnit Circle Calculator
Visualize all six trig functions on the unit circle, with quadrants and reference angles.
Open calculatorAngle & Arc Tools
Angle conversions and circular arc geometry.
Construction & Building
Trig math for the trades — built by a builder, for builders.