Triangle area
Explore the area of a triangle, step by step.
Inputs
Use the units shown—
Enter your values and select Calculate.
Formula & explanation
A = ½ × base × height
Variables & units
- Base
- m · minimum 0
- Perpendicular height
- m · minimum 0
Worked example
A base of 12 m and height of 8 m gives 48 m².
Assumptions
Use the perpendicular height, not the sloping side.
Formula version 1.0.0. JavaScript floating-point arithmetic applies. Results display up to 6 decimal places; stored values retain available precision. Use the units shown.
Practice with an example
Use the default input values to find the answer. The reset icon restores those values.
Calculated on your device. Your latest 100 calculations stay in this browser.