How do I calculate the area of a room for flooring?

Measure the length and width of the room in meters and multiply them together. For irregular rooms, divide into rectangles and add the areas. Add 10–15% extra for cuts and waste when ordering flooring.

How much paint do I need for a room?

Calculate the wall area (perimeter × ceiling height) minus windows and doors. Most paints cover 8–12 m² per liter per coat. Plan for 2 coats, so divide total area by the coverage rate and multiply by 2.

How do I convert square meters to square feet?

To convert square meters to square feet, multiply by 10.764. For example, 20 m² × 10.764 = 215.3 square feet. To convert square feet to square meters, divide by 10.764.

Area Calculator

Name: Area Calculator
Author: Miikka

Calculate the area of any shape — rectangles, squares, circles, triangles, and more. Perfect for home improvement and construction projects.

By Miikka · CalcBrew · Updated Jul 11, 2026

Length: 4,50 m

Width: 3,20 m

14,40

square metres (m²)

144 000,00

cm²

0,00

hectares

0,00

acres

🏠 Apartment total area

×14,40 m²

×10,50 m²

Total24,90 m²

The area calculator works out the area of a rectangle, triangle or circle from the dimensions you enter. It's a handy tool for renovations, garden projects and schoolwork when you need an accurate square measure fast.

How the calculator works and what it’s for▾

How area is calculated

A rectangle's area is its width times its height. A triangle's area is the base times the height divided by two, and a circle's area comes from the radius squared multiplied by pi.

The calculator picks the right formula for the shape you choose, so you don't have to remember them.

What you enter and get

You choose a shape and enter its dimensions, such as the sides, the base and height, or the radius. The result is the area in your chosen units.

Where area is needed

Area matters when estimating paint, tiling, lawn or flooring requirements. It's also a basic calculation used in maths exercises and many building projects.

Tips for measuring

Use the same unit for every dimension so the result is correct. You can often split an irregular space into rectangles and triangles, work out each part's area and add them up for the total.

🔄 Reviewed June 2026

Frequently asked questions

Cite this calculator

APACalcBrew. (2026). Area Calculator. https://calcbrew.com/area-calculator

MLA“Area Calculator.” CalcBrew, 2026, calcbrew.com/area-calculator.

Link to https://calcbrew.com/area-calculator. Results are estimates; cite the underlying formula or data source for academic work.

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