U.S. default
Many U.S. commercial quotes use square feet; carpet historically may also be discussed by square yard.
Metric markets
Most international construction documents use square metres.
Always label the rate
A cost without its area unit is ambiguous and can create order-of-magnitude comparison mistakes.
Our tools
The site's area calculator shows both sq ft and m² while project-cost tools let users enter the rate used in their local quote.
Commercial flooring decisions depend on the actual substrate, moisture conditions, traffic, cleaning regime, accessibility requirements, fire/building rules, manufacturer instructions and local code. This site is for planning and comparison, not installation instructions.