Flooring Calculator
Calculate how much laminate, vinyl, or hardwood flooring you need by room dimensions. Get quantity in square feet, boxes, and estimated cost.
Last updated 2026-08-21
What Is a Flooring Calculator?
A flooring calculator estimates how much laminate, vinyl, or hardwood flooring you need for a room by area, and it adds a waste factor so you order enough for cuts and mistakes. It is the first step for any homeowner installing new flooring. It gives square footage to order, which you can convert to boxes using the box coverage on the carton.
How It Works
Area = Room Length × Room Width. To order = Area × (1 + Waste ÷ 100).
Example
A 12 ft × 10 ft room with 10% waste: 120 sq ft → order 132 sq ft.
How to Calculate
- Measure the length and width of the room in feet. A 12 by 10 foot room has 120 square feet.
- Measure closets or alcoves separately and add them to the room area.
- Choose a waste factor. Use 10 percent for a simple rectangular room.
- Multiply the area by 1 plus the waste as a decimal. One hundred twenty times 1.10 is 132 square feet to order.
- Divide the square footage to order by the coverage per box printed on the flooring carton, and round up to whole boxes.
Recommended Waste Factor by Layout
| Layout Type | Recommended Waste |
|---|---|
| Straight lay, rectangular room | 5 to 10% |
| Staggered plank layout | 10% |
| Angled or diagonal install | 10 to 15% |
| Room with many cuts and closets | 15% |
| Patterned or herringbone | 15% |
Sources
Frequently Asked Questions
What waste factor should I use?
5–10% for simple rectangular rooms; 10–15% for angled cuts, closets, and pattern layouts.
Does this include closets?
Measure each closet separately and add it to the room area before calculating.
Is flooring sold by the square foot?
Some is, but planks often come in boxes with a labeled coverage per box.
Estimate the cost with the Flooring Cost Calculator. Also try: Tile Calculator, Flooring Cost Calculator or browse Flooring Calculators