Enter the victorian room measurements in the boxes below in meters. For example – 3.45 for (3mtr 45cm). The calculation will give you the m² of the room. You will need a kit about 10% less for than this. This is due to the none heated area around the edge of the room and also when laying the mat you need to leave a gap between each run. Remember if our design team see anything that could be a potential issue they will contact you before going ahead with the order, it is not in our or your interest to get anything wrong.