Home & Renovation
Flooring Calculator
Calculate boxes and cost of hardwood, laminate, or tile flooring.
Flooring comes in boxes covering a fixed square footage each. This calculator determines exactly how many boxes you need plus waste allowance, preventing the common error of running short on installation day.
Boxes Needed
13 boxes
- total Sqft
- 275 sq ft (with waste)
- total Cost
- $845
- leftover Sqft
- 11.0 sq ft leftover
Formula and method
Boxes = ⌈(Room Sqft × (1 + Waste%)) / Coverage per Box⌉
Rounds up to whole boxes. Waste factor accounts for cuts, mistakes, and future repairs. Always buy from the same dye lot for color consistency.
Worked examples
Living room with straight layout
- Room Area (sq ft):
- 320
- Coverage per Box (sq ft):
- 22
- Price per Box ($):
- 72
- Waste Factor (%):
- 10
Boxes Needed: 16 boxes
Diagonal kitchen tile
- Room Area (sq ft):
- 150
- Coverage per Box (sq ft):
- 12
- Price per Box ($):
- 95
- Waste Factor (%):
- 18
Boxes Needed: 15 boxes
Assumptions and limits
- Rectangular room
- Single-room calculation
This tool provides an educational estimate. Rules, rates and personal circumstances can change the answer. Review the assumptions before relying on a result. Report a correction.
Common mistakes to avoid
- Buying exactly the right amount with no waste — cuts and mistakes require buffer.
- Ordering from different dye lots if running short — color variation will be visible.
- Forgetting underlayment — most floating floors require underlayment (separate calculation).
Frequently asked questions
What waste factor should I use for diagonal flooring?
Diagonal layouts require 15-20% waste factor vs 10% for straight. Herringbone patterns can require 20-25% waste due to the complexity of cuts.
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