Date: 27.11.2025
Author: Zoe
Category: Measuring guides

How to Measure a Room for Flooring

How much flooring do I need?

Our flooring is generally sold in metres squared (m2) so you need to measure your room in this way to know what quantity of flooring you will require. Here is an easy-to-follow guide on how to measure your room.

What you need:

  1. Measuring tape
  2. Paper
  3. Pen or pencil
  4. Calculator or smartphone

 

Roughly sketch the shape of the room you are measuring. Make sure you include any doorways as you will need to take your measurements from halfway into the doorframe. Record your measurements on your drawing.

 

Measuring a rectangular room:

If your room is a rectangle or square, use your measuring tape to take two measurements in metres of the length and width of the room and multiply them together. For example, if your room is 6 metres long and 4 metres wide, the area will be 24 square metres because 6m x 4m = 24m2.

Measuring a rectangular room

Measuring a room with bay windows or alcoves:

For rooms that aren’t a simple square or rectangle for example ones with bay windows or alcoves simply take measurements of the longest and widest parts of the room and multiply them by each other.

Measuring a room with bay windows or alcoves

Measuring an L shaped room:

If your room isn’t rectangular, we recommend splitting it into rectangular sections. Multiply the width and length of each rectangle together to find the area. Then, add the areas of each rectangle together to find the total area. If you have an L shaped room, for example, this can be split into 2 rectangles.

Measuring an L shaped room

Measuring an irregular shaped room:

And if you’ve got a complicated room, this method still works. Simply split the room into as many rectangles as needed. Multiply the length and width of each rectangle to find the areas, then add them all together to find the total area. (Remember to jot down the measurements as you go along!) 3m2+18m2+1m2+2m2+6m2=30m2.

Measuring an irregular shaped room

Please note: Some measuring guides on other websites explain how to calculate wastage. You don’t need to do this, as the calculator just below will automatically add the wastage once you enter your room measurements.

Floor Area Calculator

Use this square metre calculator (or square foot calculator) to help with your flooring measurements.

For L-shaped rooms, add a second area.

Area 1

Metres Feet

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