Triangle area
6 × 4 ÷ 2
Area = base × perpendicular height ÷ 2
Formula
Base × perpendicular height ÷ 2
How the calculation works
Find triangle area using the base and perpendicular height. Enter each measurement in the unit shown beside the input. The result updates when you change a value; incomplete or unsupported inputs display an explanation.
Worked example
A 6 m base and 4 m height give an area of 12 m².
When to use this calculator
Use this when the perpendicular height is known.
Common mistakes and limits
The sloping side is usually not the height. This tool does not solve unknown angles or sides.
Check your result
Check that all measurements describe the same object or time period. Repeat the calculation with unrounded values, then round only the final quantity to a precision suitable for the task.
Frequently asked questions
Does this calculator need an account?
No. Calculations run in your browser without an account.
How precise is the displayed result?
The display rounds to six decimal places. Measurement uncertainty can be larger than this rounding.
