This equilateral triangle reference table shows the area for a range of side length values. Every figure is computed with the same engine that powers our Equilateral Triangle Calculator, so the numbers are exact.
| Side length | Area | Height | Perimeter |
|---|---|---|---|
| 1.5 units | 0.9743 | 1.2990 | 4.50 |
| 3 units | 3.8971 | 2.5981 | 9.00 |
| 4.5 units | 8.7685 | 3.8971 | 13.50 |
| 6 units | 15.5885 | 5.1962 | 18.00 |
| 9 units | 35.0740 | 7.7942 | 27.00 |
| 12 units | 62.3538 | 10.3923 | 36.00 |
| 18 units | 140.2961 | 15.5885 | 54.00 |
| 30 units | 389.7114 | 25.9808 | 90.00 |
| 42 units | 763.8344 | 36.3731 | 126.00 |
| 60 units | 1,558.8457 | 51.9615 | 180.00 |
How to use this table
Find the row closest to your side length and read across to the area. For a value between two rows, the real figure sits between them — or enter your exact numbers in the Equilateral Triangle Calculator for a precise answer.
Need a value that is not in the table? — the Equilateral Triangle Calculator does it instantly, for free, with the formula and a worked example built in.
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