Area Calculator
Calculate the area of common shapes like square, rectangle, circle and triangle.
Area Formulas:
- • Square: side² | Rectangle: l × w
- • Circle: πr² | Triangle: ½ × b × h
What is Area Calculator?
An area calculator computes the area of common shapes — square, rectangle, circle, triangle, and more — from their dimensions.
Area calculations are used in flooring, painting, land measurement, and construction.
How does the Area Calculator work?
The calculator applies the formula for the selected shape.
It converts the result between square metres, square feet, and acres.
How to use the Area Calculator?
- Select the shape.
- Enter the required dimensions.
- The calculator shows the area in multiple units.
Example
Example calculation
- Enter 10 as the length.
- Enter 5 as the width.
- The results update instantly.
Benefits of using the Area Calculator
- Estimate material quantities.
- Measure land and rooms.
- Solve geometry problems.
Who should use the Area Calculator?
- Students practising problems and verifying homework answers.
- Teachers preparing examples and checking student work.
- Engineers and analysts who need quick, reliable calculations.
- Anyone who wants to double-check manual arithmetic.
Tips for getting the most out of the Area Calculator
- Check your inputs for typos — a single wrong digit changes the result completely.
- Use the result to verify your manual working, not to replace understanding.
- Try a simple case first (like 0 or 1) to make sure the output makes sense.
Frequently Asked Questions
How many square feet is one acre?
One acre equals 43,560 square feet, or about 4,047 square metres.
How do I calculate the area of an irregular plot?
Divide it into regular shapes, calculate each area, and sum them.
Stuck on a homework step? Run it through the Area Calculator, then work backwards from the answer to see where your method went wrong.
Related Calculators
Surface Area Calculator
Calculate the surface area of common 3D shapes.
Area Of A Circle Calculator
Calculate the area of a circle from its radius or diameter.
Area Of A Rectangle Calculator
Calculate the area of a rectangle from length and width.
Area Of A Sector Calculator
Calculate the area of a circle sector from radius and angle.
Area Of A Square Calculator
Calculate the area of a square from its side length.
Area Of A Triangle Calculator
Calculate the area of a triangle from base and height.