Math
Triangle Area Calculator
Find the area of a triangle from its base and height.
The result is the area of the triangle in square units, based on the base and height entered.
Formula
Triangle area = ½ × base × height.
How it works
Enter the base and the vertical height. The calculator multiplies them and halves the result, since a triangle is half of a rectangle with the same base and height.
Worked example
For example, a base of 10 and a height of 6 give an area of ½ × 10 × 6 = 30.0000 square units.
FAQs
What does the Triangle Area do?
It takes the values you enter and works out the triangle area for you, showing the result straight away.
What should I enter?
Enter ordinary numbers in the boxes above. If a value does not make sense for this calculation, the page will ask you to check it instead of showing a wrong answer.
Can I use the result for homework or everyday math?
Yes. It is a general-purpose math helper; for exam or professional work, still check the steps against your own working.
Related calculators
Arithmetic Sequence Calculator
Instant result, no sign-up.
All tools are free.
Each page shows the formula it uses, so you can check the result yourself.
Built for phone browsers.
Start with a free calculator
Search, pick a calculator, and get an instant result. No sign-up, no download.