What is a square metre?
A square metre is a unit of surface measurement equal to the area of a square with sides of one metre. Its symbol is m². It is the universal unit used to express surface areas against a common standard.
Calculation Tool
Square Metre Calculator and Sketch Plan
Enter the width and length of a room and the area is worked out as you type. Name the space and add it to your schedule — every space you add is laid out automatically as a 2D plan and a 3D sketch.
Room Dimensions
Results update as you type. Use ‘Add to Schedule’ to record a space in the list.
Area
0 m²
Perimeter
0 m
- Dönüm
- 0
- Square feet (sq ft)
- 0
- Wall (paint) area
- 0 m²
- Number of pieces
- —
Schedule of Accommodation
No spaces have been added yet.
Enter dimensions above and select ‘Add to Schedule’.
Drag to position · 25 cm grid
Applications
What can the square metre calculator be used for?
Homes and Rooms
Work out the area in square metres of a home, a room or a plot of land; add each space to the schedule to read off the total.
Material Quantities
Work out how much carpet, timber flooring, tiling or paint is required, with an allowance for wastage.
Sketch Plans and Early Design
See your brief as a 2D plan and a 3D sketch, and arrive at a starting point ready to discuss with our office.
AREA = LONG SIDE (a) × SHORT SIDE (h)
How is a square metre calculated?
The area of a rectangular surface is found by multiplying its width by its length. A room with a long side of 5 metres and a short side of 2 metres therefore has an area of 5 × 2 = 10 square metres.
What is the difference between net and gross area?
Net area is the usable area measured between the internal faces of the walls. Gross area also takes in the thickness of those walls. The dimensions you enter in this tool are read as net area; once you enter a wall thickness, the gross area is calculated automatically.
How many square metres are there in one dönüm?
One dönüm corresponds to 1,000 m² and is equivalent to the decare in the metric system. To find the figure in dönüm, divide the area in square metres by 1,000.
How is paint area calculated?
The wall surface is the perimeter of the room multiplied by the floor-to-ceiling height. Door and window openings are deducted from that figure; in this tool the deduction is entered as a percentage and defaults to 15%.
Tools
Air Conditioning BTU Calculator
Enter the dimensions and conditions of your room and work out the cooling capacity required. Place the air conditioning unit on a wall in the 3D room and see, as you go, how the capacity you have chosen covers the space.
Open toolPaint Calculator
Enter the room dimensions and get the net paintable area, the litres required and how many tins to buy. Doors and windows are deducted from the walls; the ceiling is optional.
Open toolTile Calculator
Enter the area and the tile size to get the square metres including waste, the number of tiles and the number of boxes. It also estimates adhesive and grout.
Open toolFlooring Calculator
Enter the room dimensions to get the square metres including waste and the number of packs required. It also works out the underlay and the skirting run.
Open tool