(Single Room Plan - Multi Room Plan - Full House Plan)

How to Measure and Estimate a Single Room using, 4mt wide Carpet.

This page basically explains;

  • The Measurements that are required when you draw a Floor Plan.
  • How to Install (or cover) this Room (or area) by using a series of 4 metre wide runs joined side to side.

In order to work out how much carpet is needed, you must work out the length and layout of these runs.

However, if you already have your floor plans use our Floorcovering Estimators

Take a closer look at these examples below.

One Room Installation.

A simple one room installation:

If you wish to cover this room with 4 mt wide floorcovering.

The room is 7.7 metres long and 3.9 metres wide, but while 3 walls are straight, one wall comes in approximately 40cm at a point 4.6 metres from the bottom end of the room.


There are two main ways that you could install this room:

Direction  A

Run Direction A (Down the Room)

In this example, we have used one run of floorcovering, the run being 7.7 metres long and 4.0 metres wide (the arrow on the diagram indicates the run direction). Notice how the area of floorcovering (indicated by the dotted lines) is slightly larger than the area of the room (the green area). The area of floorcovering that is part of the run but is outside the area of the room is wastage, and is indicated by the orange coloured area in the diagram. For this option, the total amount of floorcovering needed being, 7.7 x 4 = 30.8 square metres.

Direction B

Run Direction B (Across the Room)

In this example we are using two runs of floorcovering, each run being 3.9 metres long and 4.0 metres wide. This time we are running the floorcovering across the room, and we will have to join the two runs in the centre of the room (represented by the dotted line in the green area). Notice that there is no wastage in the run at the bottom of the diagram, because it covers an area exactly the same size as the run itself. However, there is wastage and is indicated by the orange coloured area in the top run, because the wall comes in a bit on the left hand side, and the run is 4 metres wide, while the area of the room left to be covered is 7.7 -4.0 = 3.7 metres wide (measured vertically). For this option, the amount of floorcovering needed is 2 runs which are each, 3.9 x 4mt, making a total of 15.6 square metres for each run, making a Grand total of materials needed = 31.2 square metres.

So, which is the better option ?

Well in this case Direction A uses less floorcovering and has no joins, so it may be the best option. However, installations are often not this simple. As you may like to take into consideration the look of the ribs (if any) as just this alone can affect the look of your finished project, don't get to bothered at this stage as we will explain and step you through this when you finally chose your floorcovering.

(Please note: our cost calculators automatically add 100mm (10 centimetres) to the length of each run, and round the total area up to one decimal place. Entering these two runs, each 3.9 metres by 4 metres, into the cost calculator would give the total material needed as 32.0 square metres.)

After using our Budget Estimator, you will have a better idea of what costs to expect.

Next, you will need to workout the length of the runs needed to cover your project. If you already have a Floor Plan of your room (or area), go straight to our Detailed INSTANT Floorcovering Estimators , these estimators will give a far more accurate costing by simply entering the, length of your runs, the price of the floorcoverings, the underlay required and the amount of Take-Up (if any), our Detailed Estimator even allows for, smoothedge, adhesives and stain-guarding etc.

Obviously an On-site measure will give the most accurate estimate of the total charges for the supply and installation of all materials and labour.