You can use this calculator if you've already received a price from us (per square metre) for the flooring your looking for.
Simply enter the price of the carpet (per square metre) & the width and length of the area.
The width should be the closest to what you've measured. (Example: If the width is 3.65m, then you'd select 4m. If it's 4.55m, then you'd select 5m)