Triangle Area Calculator

Why Use This Calculator?

The triangle area calculator gives quick, clear results. It uses the standard formula shown on the page. Area = (Base × Height) ÷ 2. You enter the base and the perpendicular height. The calculator returns area in square units. Use it for class or design, and quick checks at work.

Step-by-Step Instructions

1. Enter the base length in the Base field.
2. Enter the perpendicular height in the Height field.
3. Use the same unit for both values, such as centimeters or inches.
4. Click Calculate Area to view the result.
5. Press Enter in a field to calculate.

Benefits of the Triangle Area Calculator

You see your numbers placed in the formula, step by step. This helps you check the math at a glance. Whole number areas appear as integers. Other results round to two decimal places.

Inputs explained

• Base: the length of the side you pick.
• Height: the shortest distance from the base to the opposite corner. It meets the base at a right angle.

Output explained

Output shows Area equals base times height divided by 2, then the value. Example: base 5 and height 8 give 20 square units. Use the same unit for base and height, then read the area in that unit squared.

Tips and Tricks

• Use positive numbers for base and height.
• Pick any side as the base, then drop a right angle to it.
• Measure the height straight, along the shortest path to the base.
• Keep units consistent for base and height.
• Results round to two decimals when needed.
• This triangle area calculator focuses on base and height data.
• For side lengths or angles, first find the perpendicular height then use this tool.
• Press Enter in a field to calculate faster.
• Zero or negative values trigger an error message.

Common use cases for this triangle area calculator.

• Home or school assignments that need quick area checks.
• Drafting and design sketches where triangles appear in plans.
• Carpentry layouts for gables and brackets.
• Land surveying notes with triangular plots.
• Fabric cutting for pennants or bunting.
• Quick checks before computer aided design modeling.

Need a refresher on heights? Height meets the base at a right angle. Pick a side, then draw a straight line to it. Use that pair with the triangle area calculator.