Find a triangle's area from its base and height, or from all three sides. Nothing leaves your browser.
Area = base × height ÷ 2. With three sides, Heron's formula: s = (a+b+c)/2 and area = √(s(s−a)(s−b)(s−c)).
Multiply the base by the height and divide by 2. A base of 6 and height of 4 gives 12.
It gives the area from three sides: with s = (a+b+c)/2, area = √(s(s−a)(s−b)(s−c)). Sides 3, 4, 5 give 6.
Any two sides must add up to more than the third.
Any. The area is in the square of the unit you enter.
No. Everything is calculated in your browser and nothing is sent or stored.
Free tool, provided as is, with no guarantee. Results are for general information. Please do not enter personal information in feedback.