Triangle Calculators

Solve any triangle easily with our Triangle Calculator! Find sides, angles, area, perimeter, height & more—complete with step-by-step solutions.

Solve any isosceles triangle easily with our Isosceles Triangle Calculator! Find sides, angles, area, perimeter, or height—step-by-step solutions.

Solve any right-angled triangle in seconds with our Right Triangle Calculator! Find missing sides, angles, area, perimeter, or altitude—with clear, step-by-step solutions.

Use our Hypotenuse Calculator to find the hypotenuse, sides, angles, area, perimeter, or altitude of any right triangle—just enter any two known values for instant results!

Easily calculate the area, missing sides, angles, perimeter, or height of any right triangle with our Area of a Right Triangle Calculator— with solutions!

Find the perimeter of any triangle easily with our Perimeter of a Triangle Calculator! Enter sides or angles for instant, step-by-step solutions.

Find the area of any triangle using our Heron’s Formula Calculator! Enter the three side lengths and get instant, step-by-step results—no height needed

Use our Circumscribed Circle Calculator to find the inradius, circumradius, diameter, circumference, and area of the circumcircle—just from side lengths.

Classifying Triangles Calculator instantly identifies the type of triangle—based on side lengths or angles—with clear, step-by-step solutions!

Verify right triangles instantly with our Pythagorean Triples Calculator! Enter any three sides to check for a valid triple—complete with explanations.