Area Calculator
Calculate rectangle, triangle and circle areas
Free, no signup. Calculation data stays in your browser.
Your inputs
Results
Area20 m²
Area in rai0.0125 rai
Area in square wah5 wah²
Formula and method
Rectangle = width × length. Triangle = base × height ÷ 2. Circle = π × radius². Enter dimensions in meters.
Worked example
A 4 m × 5 m rectangle covers 20 m², equivalent to 5 square wah or 0.0125 rai.
Frequently asked question
How do I calculate an irregular area?
Divide it into non-overlapping rectangles, triangles or circles, calculate each part, then add them or subtract cutouts.
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