Area of a Triangle Calculator
⬛ Area & perimeter (2D). Use the Area of a triangle formula to find area, base, perpendicular height: pick the value you want, type the others, and the answer updates as you go.
Area15 cm²
Pick the ○ next to the value you want to find, fill in the others, and it solves as you type.
What each letter means
| Quantity | Unit |
|---|---|
| Area | cm² |
| Base | cm |
| Perpendicular height | cm |
Worked example
Find the area when Base = 6 cm, Perpendicular height = 5 cm.
Using A = 1/2 b h: Area = 15 cm².
Frequently asked questions
What is the formula for Area of a triangle?
A = 1/2 b h.
What do the letters stand for, and what units are used?
Area in cm², Base in cm, Perpendicular height in cm.
How do you calculate area?
Put the values into A = 1/2 b h. For example, with Base = 6 cm, Perpendicular height = 5 cm, area = 15 cm².
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (area, base, perpendicular height) and fill in the others: it rearranges the formula for you.
