CalHub

Flooring Calculator

Estimate the boxes of flooring needed for a room, with waste.

Floor area 180
Boxes needed (boxes) 10
Total cost ($) 0

Formula: boxes = area × (1 + waste) ÷ coverage per box

Step-by-step with your numbers:
1. Values used:
2. Room length = 15
3. Room width = 12
4. Coverage per box = 20
5. Waste = 10 %
6. Price per box = 0 $
7.
8. Floor area = Room length x Room width = 15 x 12 = 180
9. Boxes needed = 10boxes
10. Total cost = 0$
Did we solve your problem today?

Calculate the flooring (laminate, vinyl, hardwood or engineered) needed for a room. Flooring is sold by the box, so we round up and add waste for cuts.

The math behind it

Floor area = length × width. Add waste (usually 10%) for cuts and mistakes.

Boxes = area with waste ÷ coverage per box, rounded up.

Worked example

15×12 ft room (180 ft²), 20 ft²/box, 10% waste → 180 × 1.10 ÷ 20 = 10 boxes.

FAQ

How much waste for flooring?

10% for straight lays; 15% for diagonal or herringbone patterns.

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