Geometry Calculators: Area, Volume, Triangles, Circles and Distance
Geometry problems come down to choosing the right formula and keeping units straight. These calculators compute the area, volume and dimensions of common shapes and the distance between points, showing the equations used so you can verify your own working.
9 free geometry calculators
Triangle Calculator
Enter all three side lengths (SSS) to solve the triangle's angles, area and perimeter.
Open calculator →Volume Calculator
Volume for common 3D shapes — cube, box, sphere, cylinder or cone.
Open calculator →Slope Calculator
Slope, y-intercept and incline angle of the line through two points.
Open calculator →Area Calculator
Area for common 2D shapes — square, rectangle, triangle, circle, trapezoid or parallelogram.
Open calculator →Distance Calculator
Straight-line distance between two points, in 2D or 3D.
Open calculator →Circle Calculator
Enter any one measurement — radius, diameter, circumference or area — and get the rest.
Open calculator →Surface Area Calculator
Total surface area for common 3D shapes — cube, box, sphere, cylinder or cone.
Open calculator →Pythagorean Theorem Calculator
Fill in any two sides of a right triangle to solve the third — a² + b² = c².
Open calculator →Right Triangle Calculator
Solve every side, angle, area and perimeter of a right triangle from any two known values.
Open calculator →Frequently asked questions
Do the geometry calculators handle different units?
Enter all dimensions in the same unit; the results are in the corresponding square or cubic unit.