Flooring Calculator
Enter the room dimensions, coverage per box, and a waste factor to get the floor area and the number of boxes to order.
Results
- Boxes to order
- 7 boxes
- Floor area
- 120 sq ft
- Area incl. waste
- 132 sq ft
Estimates only. Round up and buy a little extra to account for waste, spills, and breakage.
Enter the room dimensions, coverage per box, and a waste factor to get the floor area and the number of boxes to order.
How to use the flooring calculator
- Enter the room length in ft.
- Enter the room width in ft.
- Enter the coverage per box in sq ft.
- Enter the waste factor in %.
- Optionally add a price to estimate the total project cost.
- Read your quantities instantly — no sign-up, and you can print the estimate to take to the supplier.
Worked example
Inputs
- Room length
- 12 ft
- Room width
- 10 ft
- Coverage per box
- 20 sq ft
- Waste factor
- 10 %
Results
- Boxes to order
- 7 boxes
- Floor area
- 120 sq ft
- Area incl. waste
- 132 sq ft
Using the example values above, the flooring calculator returns 7 boxes (boxes to order). Change any field to match your own project and the numbers update instantly.
How much extra should I order?
Always order a little extra. A 5% waste factor suits simple, square projects; 10% is right for most jobs; bump it to 15–20% for irregular shapes, diagonal patterns, or uneven ground. Running short almost always costs more than the leftover material.
Formula
Boxes = (area × (1 + waste%)) ÷ coverage per box.
Frequently asked questions
- How much flooring waste should I add?
- Add 10% for straight layouts and 15% for diagonal patterns or busy rooms.
- Should I buy an extra box?
- Yes — keep one spare box for future repairs since dye lots change over time.
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