How to calculate flooring
Needed = length × width × (1 + waste%)
Worked example. Flooring needed: 185 sq ft.
Example inputs — Room length (ft): 14 ft; Room width (ft): 12 ft; Waste allowance: 10%; Price per sq ft: $3.50; Sq ft per box: 20. Starting values are illustrative.
From George Guju, founder of Calculyn · Educational calculator guidance, not professional advice.
How it works
Multiply length by width for the room's area, then add a waste allowance for cuts and mistakes — about 10% for straight layouts and 15% for diagonal or herringbone.
Assumptions & limitations
- Material estimates only — buy 5–10% extra for waste and cuts.
- Check coverage figures on your product label.
Formula and assumptions reviewed October 2026 by the Calculyn team. How we build our calculators
Frequently asked questions
Should I buy extra?
Yes — keep a spare box for future repairs, since exact colors can be discontinued.