Carpet installers typically charge $2 to $8 per square foot, for materials and labor, depending on the carpet quality, fiber material, room size, and prep work required. Common preparation includes removing the old carpet and replacing the carpet padding for an additional $0.50 to $2.50 per square foot. Most carpet manufacturers require new padding of a certain thickness to be installed with the carpet to keep the warranty intact.
Other factors that influence the cost of installing new carpet include the hourly labor rates in your area, the installer's experience, and the complexity of the installation. Rooms with stairs, corners, or odd shapes take longer to install and require more carpet because there is more waste when cutting to carpet to fit the irregular space.