area calculator m2

What is area in m²?

Area tells you how much flat surface a shape covers. The standard metric unit is the square meter, written as m². If a room has an area of 12 m², it means the floor covers the same space as 12 squares, each 1 meter by 1 meter.

People use m² calculations for flooring, painting, landscaping, roofing, construction estimates, and real estate listings. A reliable area calculator helps you avoid expensive mistakes when buying materials.

How to use this area calculator m2

• Select a shape: rectangle, square, circle, triangle, or trapezoid.
• Choose your input unit (m, cm, mm, ft, or in).
• Enter all required dimensions.
• Click Calculate Area to see the result in m² and extra unit conversions.

Area formulas by shape

Rectangle

Formula: Area = length × width

Use this for rooms, tiles, carpets, decks, and most simple plots.

Square

Formula: Area = side × side

A square is a special rectangle where all sides are equal.

Circle

Formula: Area = π × radius²

Useful for circular gardens, tables, hot tubs, and round slabs.

Triangle

Formula: Area = (base × height) ÷ 2

Common in roof sections, gable ends, and angled spaces.

Trapezoid

Formula: Area = ((Base A + Base B) ÷ 2) × height

Ideal for irregular lots and shapes with two parallel sides of different lengths.

Practical examples

1) Flooring a bedroom

Suppose your room is 4.2 m long and 3.6 m wide. Area = 4.2 × 3.6 = 15.12 m².

If tile boxes cover 1.5 m² each, you need about 11 boxes (always add 5–10% extra for cuts and waste).

2) Painting a wall

Wall width is 5 m and height is 2.8 m. Area = 5 × 2.8 = 14 m².

If one liter of paint covers 10 m² per coat, you need around 1.4 liters per coat for that wall.

3) Converting from feet to m²

A rectangular patio is 12 ft by 10 ft. This tool converts feet to meters internally and gives the result directly in m². That area is approximately 11.15 m².

Common mistakes to avoid

• Mixing units: entering one value in feet and another in meters.
• Using diameter instead of radius for circles.
• Forgetting to divide by 2 when calculating triangles.
• Not adding waste allowance for materials like tile, wood, or carpet.
• Rounding too early: keep precision until the final step.

Quick conversion references

• 1 m² = 10,000 cm²
• 1 m² = 1,000,000 mm²
• 1 m² ≈ 10.7639 ft²
• 1 hectare = 10,000 m²
• 1 acre ≈ 4,046.856 m²

Final thoughts

A good area calculator m2 saves time and improves planning accuracy. Whether you are pricing renovation work, estimating paint, or comparing real estate spaces, the right area number is the foundation of better decisions.

Use the calculator above, then double-check measurements on site. Accurate inputs lead to accurate outputs.