geometry calculator

Triangle Circumradius Calculator

Triangle Circumradius Calculator for measurement cleanup, plan review, and shape estimation when you want a fixed formula answer without improvising the math by hand.

Important Use Notice

Informational calculator only. Verify important outputs independently before legal, tax, medical, engineering, safety-critical, contractual, employment, or compliance use.

Estimate

Enter job values, review the estimate, then use the decision hints before ordering or quoting.

Estimate Results

Enter values to see the result.

Formula

circumradius = abc / 4A

Use the three side lengths and the triangle area A to measure the circumcircle radius.

The triangle must be valid and non-degenerate.

Example

13 units, 14 units, 15 units gives Circumradius 8. 125.

Check

Mixing units, scales, or coordinate conventions across side a, side b, side c before calculating circumradius.
Rounding too early when the result still feeds another geometry or algebra step.

Next Step