Bedroom flooring
Typical plank flooring order.
9 boxesFlooring boxesflooring calculator square feet
Flooring Square Foot Calculator
For a rectangular room, flooring square footage is length times width, plus a waste allowance for cuts and future repairs.
Inputs
Results
Immediate estimateFlooring boxes9 boxes198 sq ft purchased
Measured area180 sq ft
Waste allowance18 sq ft
Adjusted flooring198 sq ft
Shopping list
- 9 boxes Flooring
Diagram
Flooring area
Room area plus waste is divided by box coverage and rounded up.
- Room length
- Room width
- Box coverage
How this calculator works
Enter room dimensions, waste allowance, and box coverage to estimate how much flooring to buy.
Formula
The engine multiplies length by width, adds the selected waste allowance, then divides by box coverage and rounds up.
Area
length × widthAdjusted material
area + waste allowanceBoxes
adjusted material ÷ box coverage, rounded upAssumptions
- Room shape: Single rectangular room
- Openings: Closets, alcoves, stairs, and pattern matching are not included
Worked examples
Low-waste input
Shows a waste warning.
5 boxesFlooring boxesFAQ
What waste percentage should I use?
Ten percent is a common planning value for straight layouts; diagonal layouts or complex rooms may need more.
Should I subtract cabinets or islands?
For many flooring types, fixed cabinets are not floored underneath. Measure the actual installed area when possible.
Sources and review
- Flooring project planning guidance, The Home Depot. Accessed 2026-07-16.
Reviewed 2026-07-16. Planning estimates only; confirm project-specific requirements.