Most carpets come in standard 3.66m wide and rarely 4m wide. We recommend to add about 5% -10%for wastage if any. Following is a simple rough estimate of how much carpet for your room. Let’s start with a simple room; if your room is 4M by 5M, we would use the below formula to get the area: Length in Metres X Width in Metres, 5.0mx 4.0m = 20sqm + 2.0sqm (10% wastage), Total area required = 22.0sqm or approximately 6.01 Lineal Meters (22÷3.66). How to calculate for multiple rooms: Let’s say you have a room that is a bit more complicated, that isn’t a simple rectangle or square, or you want to use the flooring across multiple rooms. You can still use the calculation as above, but you will need to section off areas of the room using the masking tape so that you have multiple rectangles to get m2 of each area individually. Once you havemeasured each section, you can then use the calculation above to get your square or lineal meter area: Length in Metres X Width in Metres, Bedroom A 4.0m x 5.0m = 20m2, Bedroom B 3.5m x 4.0m = 14m2, Passage X 3.5m x 1.0m = 3.5m2, Passage Y 2.0m x 2.0m = 4m2, Total = 41.5m2 + 4.15m (10% wastage), Total required = 45.65m2 or approximately 12.5 Lineal Metres (45.65÷3.66)