Lowe's offers a rapid carpet install on in-stock carpet at some locations. That means you can get certain carpets installed within 5 days from your purchase. There is a rapid install fee that will be added to your order.
The countdown begins from the time you purchase the installation and from when the carpet is available at Lowe's (not from the time you purchase the measurement). See your Lowe's Specialist for details to see if your selection qualifies.