△Geometry & Trigonometry Calculators
Free geometry and trig calculators with diagrams — solve triangles, calculate areas and volumes, explore the unit circle and more.
Solve any triangle given any 3 values using SSS, SAS, ASA or AAS.
Click any angle to see its exact sine, cosine and tangent values.
Calculate trig functions for any angle in degrees or radians.
Solve for any side of a right triangle with an animated diagram.
Apply the law of sines step by step including the ambiguous case.
Apply the law of cosines to find sides and angles step by step.
Find radius, diameter, area and circumference from any one value.
Calculate the area of triangles, rectangles, circles, trapezoids and more.
Calculate the volume of spheres, cylinders, cones, cubes and pyramids.
Calculate surface areas of all common 3D shapes with formulas.
Find distance, slope, midpoint and line equations in one tool.
Convert between degrees, radians and gradians with π fraction form.
Add, subtract vectors and find dot product, cross product and magnitude.
Find interior and exterior angles for any regular polygon.
Calculate the compass bearing between two map coordinates.
About these geometry calculators
These geometry and trigonometry calculators include interactive diagrams so you see the shape and the numbers at the same time. Solve triangles by entering any three known values and the calculator finds the rest — using SSS, SAS, ASA, or AAS as appropriate. The interactive unit circle lets you click any angle and instantly see its exact sine, cosine, and tangent values.
Every tool runs entirely in your browser with no signup required. From basic area and volume calculations to advanced vector operations and coordinate geometry — these calculators are ready to use immediately.