Calculate the area of any triangle when its base and perpendicular height are known. Includes the standard triangle area formula, worked example, units and key triangle terminology.
Fill in the details and click Calculate to see your results.
This is the standard triangle area calculator for the most common school and everyday geometry problem.
The height is the perpendicular distance from the opposite vertex to the selected base. It is not necessarily one of the triangle sides.
The result is expressed in square units because two lengths are multiplied.
| Base | 12 cm |
| Perpendicular Height | 8 cm |
| Triangle Area | 48 |
| Valid Input | 1 |
The triangle has an area of 48 square centimetres.
Try this example →Area equals one half multiplied by the base and the corresponding perpendicular height.
Yes. The height is the perpendicular distance to the selected base.
Yes. Any side can be selected as the base as long as its corresponding perpendicular height is used.
The answer is in square units, such as cm², m² or ft².