Area Calculator
Calculate area of squares, rectangles, triangles, circles, and more. Perfect for construction, landscaping, and geometry calculations.
Area Calculator
Area Results
Enter dimensions to calculate area
About the Area Calculator
Our free area calculator finds the area of rectangles, squares, triangles, circles, ellipses, and trapezoids. Enter the required dimensions (length, width, radius, base, height, or sides) and get area in square metres, square feet, acres, and hectares. Use it for flooring, landscaping, room size, and land area. Each shape uses the standard formula (e.g. rectangle = length × width, circle = πr²). For volume of 3D shapes, use our volume calculator or concrete calculator.
Frequently Asked Questions About Area
How is the area of a circle calculated?
Area = π × radius². Enter the radius (half the diameter) and the calculator uses π ≈ 3.14159.
Can I get area in square feet or acres?
Yes. Results are shown in square metres, square feet, acres, and hectares so you can use them for any project or jurisdiction.
What units should I enter?
Enter dimensions in the same units (e.g. metres). The calculator converts and shows area in multiple units. Use consistent units for length and width.
How the Area calculator works
This free area calculator runs entirely in your browser using standard mathematical formulas. Enter your figures, tap Calculate, and results update instantly — no signup required.
Figures are estimates for general information. Always verify important decisions with a qualified professional where relevant.
- Input your values using the fields above (numeric keypad on mobile).
- Results use precise floating-point arithmetic rounded for display.
- Refresh or change inputs and recalculate anytime.
Worked example
- Choose typical values for a common area scenario.
- Enter those values in the calculator fields above.
- Tap Calculate and compare the on-screen result with the expected formula outcome.
- Adjust one input at a time to see how the result changes.