Area Calculator
Calculate the area and perimeter of rectangles, circles and triangles.
Your details
How the area calculator works
Choose a shape and enter its dimensions in metres; results also convert to square feet.
Formula
rectangle = w·h • circle = πr² • triangle = ½·b·h
Worked example
A 5 m × 3 m room has an area of 15 m² (161.5 ft²).
Frequently asked questions
How do I convert m² to ft²?
Multiply square metres by 10.7639.
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