Find out how many boxes of flooring — or how many tiles — you need for a room, with waste allowance and cost estimate.
Adjusted area
132 sq ft
Pieces to buy
7
Calculator
Boxes needed
7
Adjusted area (with waste)
132 sq ft
Area breakdown by waste level
0% waste
6
5% waste
7
10% waste
7
15% waste
7
How to calculate flooring
First measure the room length and width in feet and multiply to get the area in square feet. Add a waste allowance — 10% is standard for straight-lay patterns, 15% for diagonal or herringbone, and 5% for simple repairs. Dividing the adjusted area by the coverage per box (printed on the package) gives you the number of boxes to buy.
For tile, divide the tile dimensions (in inches) by 12 to convert to feet, then multiply width by height to get the tile area in square feet. Divide the adjusted room area by the tile area and round up to the nearest whole tile. Always buy at least one extra box to allow for future repairs from the same batch.
What waste percentage should I use?
Use 10% for straight-lay patterns, 15% for diagonal or herringbone cuts, and 5% for small patch repairs. Complex room shapes with many cuts also warrant a higher waste factor.
Where do I find the box coverage?
The coverage per box (sometimes called yield or area per carton) is printed on the product label or listed in the online product spec sheet. It is typically expressed in square feet or square metres.
Should I account for doorways and obstacles?
For most rooms it is simpler to calculate the full rectangle and let the waste factor absorb cuts around doorways. For very large obstacles like kitchen islands, subtract their area first, then apply the waste percentage.
Results are estimates. Verify with a professional for important decisions.
About this calculator
This calculator tells you how many boxes of laminate, hardwood, or vinyl flooring — or how many individual tiles — you need for a room. Enter your room dimensions or total area, choose a waste allowance, and get an instant count with an optional cost estimate.
How to read your results
The headline figure is the total number of boxes (or tiles) you should buy. Below it, the adjusted area shows your room area after the waste factor is added. The bar chart compares how many boxes or tiles you would need at four different waste levels — 0%, 5%, 10%, and 15% — so you can see how a small buffer raises the order quantity.
Worked example
A room 12 ft by 10 ft (120 sq ft) with laminate boxes covering 20 sq ft each and a 10% waste allowance.
Adjusted area is 132 sq ft. You need 7 boxes (ceil(132 / 20) = 7). The same room in tile mode with 12 x 12 in tiles also yields 132 tiles.
Frequently asked questions
How much waste should I add?
A straight lay with minimal cuts typically needs 5–10%. Diagonal or herringbone patterns can waste 15% or more. When in doubt, 10% is a safe default that also gives you spares for future repairs.
Does the calculator work for any flooring type?
Yes — laminate, engineered hardwood, luxury vinyl plank, ceramic tile, and any material sold in boxes or by individual piece. Just enter the coverage per box or the tile dimensions.
What if I enter both room length/width and a direct area?
The direct area field overrides the length-times-width calculation. Leave it blank to let the calculator multiply room length by width automatically.
Why does the bar chart show counts at four waste levels?
Material stores usually sell whole boxes, so a small difference in waste percentage can bump you into an extra box. The chart lets you compare 0%, 5%, 10%, and 15% at a glance so you can decide how many spares are worth buying.
How it's calculated
For box mode the calculator multiplies the room area by (1 + waste / 100) to get the adjusted area, then divides by the coverage per box and rounds up to the nearest whole box using the ceiling function. For tile mode it converts the tile dimensions from inches to square feet (width × height / 144), applies the same waste factor to the room area, and divides the adjusted area by the tile area, again rounding up. Both formulas follow the standard methodology described by Inch Calculator for flooring and tile estimation.
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