What does this tool do?
Carpet is priced by area but sold from rolls, so seams and pattern repeats mean you need more than the floor area. This calculator adds a waste percentage and converts the result into square yards and cost.
The Formula
Floor area = length × width × rooms; order area = floor area × (1 + waste %); cost = order area × price per sq ftFrequently Asked Questions
How much extra carpet should I order?
About 10% for simple rectangular rooms. Increase to 15% or more for patterned carpet, diagonal layouts or several small rooms where offcuts cannot be reused.
Does the price include underlay and fitting?
No. Underlay, grippers, door bars and fitting are usually quoted separately, so add them to compare full installed prices.