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Flooring Calculator

Use this flooring calculator to estimate how much material you need and the total project cost before you buy. Enter room dimensions, plank or tile size, waste percentage, and material price to get a fast estimate of total square footage, material quantity, and budget.

How Flooring Quantity Is Calculated

The base formula is:

Floor Area = Length x Width

Then a waste factor is added for cuts and pattern alignment:

Adjusted Area = Floor Area x (1 + Waste %)

If you provide unit coverage and price, the calculator also estimates:

• Number of boxes/planks/tiles needed
• Total material cost
• Cost per square foot

Example

Room Size	Base Area	Waste	Adjusted Area	Material Cost
12 ft x 15 ft	180 sq ft	10%	198 sq ft	$1,584 @ $8/sq ft
10 ft x 10 ft	100 sq ft	8%	108 sq ft	$594 @ $5.50/sq ft
18 ft x 20 ft	360 sq ft	12%	403 sq ft	$3,224 @ $8/sq ft

Key Inputs That Affect Cost

• Waste percentage: Straight layouts may need 5-8%; diagonal or complex layouts often need 10-15%.
• Room shape: Nooks, closets, and irregular edges increase cutting and waste.
• Product packaging: Flooring is sold by box; rounding to full boxes can raise final spend.
• Material type: Hardwood, tile, vinyl, and laminate have very different price ranges.

Tips

1. Always buy a little extra material for repairs or replacements later.
2. Verify whether trim, underlayment, and adhesive are included in your estimate.
3. Measure each room twice and use the larger measurement for planning.
4. Keep a separate line item for labor so you can compare contractor quotes clearly.