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How to measure in a few simple steps

You will need only basic equipment: a pencil, paper, calculator and a metric tape measure. Floors are typically sold by the square metre, so a metric tape measure is best.

Use a tape measure to determine the room's length and width. Then multiply the length by the width to get your square meters.

Square or rectangular rooms

If your room is square or rectangular (as below), calculating the floor area is very simple. Measure the width (A) and the length (B) of the room and multiply the two measurements together. For instance, if the room is 5 metres wide and 4 metres long, you will need enough flooring for 20 square metres (5m × 4m = 20m2).

L-shaped rooms

L-shaped rooms (as below) can be harder to work out. Start by roughly sketching out the shape of the floor. Split the sketch into two square/rectangular shapes and measure the width and length of each separate shape - as shown with a dotted line below. Calculate the area of each shape by multiplying the width and length measurements together, then add the two areas together. So, the calculation for the diagram above would be:

4m (A) x 5m (B) = 20m2 , 2m (C) x 4m (D) = 8m2 , (20m2 + 8m2 = 28m2)