Area Calculator
Free online Area Calculator.
Calculator
How to Use
- Enter the required values
- Click Calculate to see the result
- Review the detailed output
Formula
Rectangle: A = L x W. Triangle: A = 0.5 x b x h. Circle: A = pi x r^2. Trapezoid: A = 0.5(a+b) x h. Parallelogram: A = b x h.
Example Calculations
Rectangle
Input: Length: 12 ft, Width: 8 ft
Result: Area: 96 sq ft
Triangle
Input: Base: 10 m, Height: 6 m
Result: Area: 30 sq m
Circle
Input: Radius: 5 cm
Result: Area: 78.54 sq cm
About This Calculator
Free online area calculator. Calculate instantly in your browser with our easy-to-use tool. No sign-up required.
Our area calculator is free, easy to use, and provides instant results. All calculations are performed in your browser for privacy and speed.
Related Calculators
Frequently Asked Questions
How to calculate area?
Rectangles: L x W. Triangles: 0.5 x base x height. Circles: pi x r^2.
Units for area?
Square units matching dimensions. Feet gives sq ft, meters gives sq m. Keep units consistent.
Area of irregular shapes?
Divide into rectangles and triangles, calculate each, sum the areas.
Area vs perimeter?
Area measures interior space (square units). Perimeter measures boundary distance (linear units).
Square feet to acres?
Divide by 43,560. For example, 87,120 sq ft = 2 acres.