Triangle Calculators — Mathematics
Triangle geometry from every direction: right-triangle area, equilateral sides, circumcircle and incircle radii, the Euler line, and triangle classification by sides and angles. Use the classifier first if you only know three measurements and are not sure which formula applies.
All Triangle Calculators
Calculate area of aright triangle with inputs, formulas, and instant results.
Calculate circumcircle radius with inputs, formulas, and instant results.
Calculate circumscribed circle with inputs, formulas, and instant results.
Calculate classifying triangles with inputs, formulas, and instant results.
Calculate equilateral triangle with inputs, formulas, and instant results.
Calculate euler line with inputs, formulas, and instant results.
Calculate gradient field plotter with inputs, formulas, and instant results.
Calculate herons formula with inputs, formulas, and instant results.
Calculate histogram generator with inputs, formulas, and instant results.
Calculate hypotenuse with inputs, formulas, and instant results.
Calculate incircle radius with inputs, formulas, and instant results.
Calculate isosceles triangle with inputs, formulas, and instant results.
Calculate outlier detector with inputs, formulas, and instant results.
Calculate perimeter of atriangle with inputs, formulas, and instant results.
Calculate pythagorean triples with inputs, formulas, and instant results.
Calculate riemann sum with inputs, formulas, and instant results.
Calculate right triangle with inputs, formulas, and instant results.
Calculate right triangle side and angle with inputs, formulas, and instant results.
Calculate similar triangles with inputs, formulas, and instant results.
Calculate special right triangles with inputs, formulas, and instant results.
Calculate torus volume with inputs, formulas, and instant results.
Calculate triangle angle with inputs, formulas, and instant results.
Calculate triangle area with inputs, formulas, and instant results.
Calculate triangle excenter with inputs, formulas, and instant results.
Calculate triangle height with inputs, formulas, and instant results.
Calculate optimal server sizing based on utilization and growth projections
Calculate area and perimeter of triangles
About Triangle Calculators
Triangle geometry from every direction: right-triangle area, equilateral sides, circumcircle and incircle radii, the Euler line, and triangle classification by sides and angles. Use the classifier first if you only know three measurements and are not sure which formula applies.
Whether you need to solve a one-time problem or verify your own calculations, these free tools cover the most common triangle scenarios. All results are computed in your browser — no data is sent to any server.
What You Can Calculate
This section includes 27 tools: Area of a Right Triangle Calculator, Circumcircle Radius Calculator, Circumscribed Circle Calculator, Classifying Triangles Calculator, Equilateral Triangle Calculator, Euler Line Calculator, Gradient Field Plotter, Herons Formula Calculator, and 19 more. Each calculator is free to use with no signup required.