Area of a Triangle Calculator
Calculates the area of a triangle from the measurements you enter. Use any unit, as long as all inputs use the same one.
Result
- Area
- 30
How to use the area of a triangle calculator
- Enter the base.
- Enter the height.
- The results update as you type, or press Calculate.
- Read the area first, then the supporting figures below it.
Formula
½ × base × height
Worked example
For example, with these inputs:
- Base: 10
- Height: 6
the calculator returns:
- Area: 30
Background
Rounding is a common source of small errors. Keep full precision during intermediate steps and round only the final answer to the number of decimal places or significant figures the question asks for.
A quick mental estimate before calculating is a powerful check. If a room's floor area comes out at 4,000 square metres or a percentage comes out above 100% when it should not, you know to look again.
Frequently asked questions
How does the area of a triangle calculator work?
It applies this formula: ½ × base × height
Can I use any units?
Yes, as long as every input uses the same unit. The answer will be in that unit (squared for areas, cubed for volumes).