Flooring Calculator
Your estimate
Flooring to buy198 ft²22 yd² · 18.39 m²
Boxes10
- Area
- 180 ft²20 yd² · 16.72 m²
- Square yards
- 22
- Estimated cost
- $693
One or two rooms; waste is set by the flooring type.
Updated 2026-10-20 · Based on: coverage figures from paint and drywall makers (USG).
How to use the Flooring Calculator
- Enter the room size (and a second area if the floor continues).
- Choose the flooring — the waste allowance changes with it.
- Type the coverage per box from the packaging.
- Read the boxes and the cost.
Formula
Flooring to buy = area × (1 + waste). 10 % for straight planks, 15 % for diagonal or herringbone.
Boxes = flooring to buy ÷ coverage per box. Carpet is sold by the square yard (9 ft²).
Worked example
With the values preset in the calculator above:
- Length
- 15 ft
- Width
- 12 ft
- Second area length
- 0 ft
- Second area width
- 0 ft
- Flooring type
- Laminate
- Coverage per box
- 20 ft²
- Flooring to buy
- 198 ft² (22 yd²)
- Boxes
- 10
- Area
- 180 ft² (20 yd²)
- Square yards
- 22
- Estimated cost
- $693
Frequently asked questions
How much laminate do I need for a 15 × 12 room?
198 ft² including 10 % waste — 10 boxes of 20 ft².
How many square yards of carpet for 180 sq ft?
180 ÷ 9 = 20 yd², plus 10 % waste = 22 yd².
Should I buy extra flooring?
Yes — 10 % covers cuts and mistakes, and spare boxes make future repairs match.
More calculators
Estimates only — check quantities with your supplier and local building code before you order.