Area Calculator

• Calculates the area of 10 shapes — square, rectangle, triangle, circle, ellipse, trapezoid, parallelogram, rhombus, sector, and regular polygon
• Converts the result into 8 area units, covering metric and imperial options such as m², cm², and ft²
• Shows the formula and step-by-step workings, and lets you copy the result in one click

1. Select the shape whose area you want to calculate
2. Enter the required parameters, such as side length, radius, or height
3. Choose the input length unit and the output area unit
4. Click "Calculate Area" to see the result, and use "Copy Result" to save it when needed

• Completely free — no sign-up or login required
• All calculations run locally in your browser; your data is never uploaded
• Enter values greater than 0 only; the sector angle must be between 0° and 360°

Free online area calculation tool, supports area calculation of 10 geometric shapes: square, rectangle, triangle, circle, ellipse, trapezoid, parallelogram, rhombus, sector, and regular polygon. Enter shape parameters to automatically calculate the area, supports multiple area unit conversions.

Select the shape whose area you want to calculate Enter the required parameters, such as side length, radius, or height Choose the input length unit and the output area unit Click "Calculate Area" to see the result, and use "Copy Result" to save it when needed

Completely free — no sign-up or login required All calculations run locally in your browser; your data is never uploaded Enter values greater than 0 only; the sector angle must be between 0° and 360°

Yes, Area Calculator is completely free. No download or installation required — it runs right in your browser.