How do I calculate flooring square footage?
For each rectangular room, multiply length × width in feet. Add all rooms together, then multiply by (1 + waste%) for the amount to buy.
Flooring Square Footage Calculator
Start with accurate square footage — then convert to boxes using coverage per carton. This calculator totals all rooms and adds your waste percentage.
Rooms
ft
in
ft
in
Project settings
Default 10%
$
Related guides
Prep & how-to
How to Measure Rooms for Flooring
Measure length, width, closets, and odd shapes so your square footage and box count are accurate before you buy.
7 min read
Planning & quantities
How Much Flooring Waste Should I Buy?
10% vs 15% waste for laminate, tile, and carpet — when to add more for diagonal layouts, stairs, and pattern matching.
7 min read
Frequently asked questions
Does square footage include waste?
Our results show both raw room area and total with waste. Use the “with waste” number when dividing by sq ft per box.
Can I use this for carpet?
Yes — switch material to carpet to see square yards, or use our carpet calculator for sq yd ordering.
Other calculators
Flooring Box Calculator · https://flooringboxcalculator.com