How to use this triangle area calculator
Enter the values requested above and select Calculate. Change any input to compare another scenario. The calculation runs locally in your browser and does not require an account.
Formula and method
Example
A triangle with base 12 and height 7 has area 42 square units.
Tips for a useful result
The height must be perpendicular to the chosen base.
What this calculator is useful for
Calculate triangle area using a base and perpendicular height. The result is intended for quick estimates, checking arithmetic and comparing scenarios. When a result affects a contract, tax filing, medical decision, building-code requirement or other high-stakes situation, verify the result with the appropriate professional or authoritative source.
Frequently asked questions
What does the Triangle Area Calculator calculate?
Calculate triangle area using a base and perpendicular height.
How does the Triangle Area Calculator work?
Area = 1/2 × base × height.
Is the Triangle Area Calculator free to use?
Yes. ERICH Calculators is free to use and does not require an account.