How it works
Find area, height and perimeter when all three sides have equal length and every angle is 60 degrees.
A = √3 a²/4; h = √3 a/2; P = 3a
Worked example
Show example inputs and result
Side: 6.
- Area
- 15.58845727
- Height
- 5.19615242
- Perimeter
- 18
Questions and answers
Why are some results rounded?
Results display up to 8 decimal places. Calculations use the unrounded values; very small values use scientific notation. JavaScript floating-point arithmetic can introduce tiny rounding differences.
Are my inputs sent to a server?
The calculator processes inputs in your browser. Its code does not send your values to a server.
Method reviewed: October 8, 2026 · Methods & accuracy