Floors & Walls
Flooring Calculator
Estimate flooring cartons from room area, waste and the manufacturer's coverage per carton.
Enter your measurements
Results update as you type.
About this calculator
Enter room dimensions or a known area, deduct anything not being floored, add a waste allowance, and enter the manufacturer's coverage per carton from the product label. The result shows net area, order area, whole cartons, purchased coverage and leftover material.
How to use this calculator
- Measure the room(s) and deduct stairs, cabinets or other unfloored areas.
- Add a waste allowance for cuts.
- Read the coverage per carton from the product label and enter it.
- Calculate to see whole cartons and the leftover coverage they include.
Formula
Net area = gross area − deductions
Order area = net area × (1 + waste ÷ 100)
Cartons = ⌈order area ÷ coverage per carton⌉; purchased area = cartons × coverage
Assumptions
- Coverage per carton comes from the manufacturer label — products differ.
- Waste applies once, before carton rounding.
- Purchased coverage and required area are always shown separately.
Common mistakes
- Counting excluded or overlapping areas twice.
- Using nominal dimensions where actual installed dimensions or usable coverage are needed.
- Treating whole purchase quantities as an optimized cutting or installation plan.
Worked example
Try it: press “Load example” above the form.
200 ft² with 10% waste is 220 ft²; at 22 ft² per carton, buy 10 cartons (220 ft² purchased) costing 500 at 50 per carton.
Limitations
No cutting optimization and no installation-compliance assessment.
Frequently asked questions
Which carton coverage should I enter?
Use the usable area printed on the selected carton. Different plank dimensions and packaging can change coverage even within one product family.
Does waste include every cut?
The percentage is an explicit area allowance, not a cutting optimizer. Diagonal layouts, borders, damaged boards and matching patterns can need a different allowance.
What does the worked example show?
200 ft² with 10% waste is 220 ft²; at 22 ft² per carton, buy 10 cartons (220 ft² purchased) costing 500 at 50 per carton.
Which assumptions should I check before using the result?
No cutting optimization and no installation-compliance assessment.
Sources
Sources explain the methods and any named product presets. Check your product label where coverage, yield or density differs.
Calculation documentation · Updated 2026-11-08 · Version 1.6.4. Estimates are planning aids. Confirm quantities, coverage and prices with your supplier before purchasing. Found an error? Report it.
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