Floors calculator

Flooring CalculatorSquare Feet & Boxes

Calculate flooring square footage, waste and full boxes for laminate, vinyl plank or hardwood. Enter room size and carton coverage for an instant estimate.

Updated August 20, 2026

✓Instant estimateNo sign-up required

✓Clear formulaSee how the result is built

✓Practical unitsBoxes, bags, sheets or volume

✓Editable wasteAdjust for your project

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Project details

Enter your measurements and material details.

Planning estimate only. Actual quantities vary with cuts, layout, site conditions and product specifications.

💡Tip:

Straight lay patterns often use about 5–10% waste; diagonal or complex layouts may need more.

How the Flooring Calculator works

The flooring calculator converts room dimensions into net square footage, then adds a cutting and replacement allowance. If you enter the coverage printed on a carton, it also calculates the number of full boxes required. This works well for laminate, LVP, engineered wood and many floating floors.

Formula

Net floor area = length × width. Purchase area = net area × (1 + waste %). Boxes = purchase area ÷ box coverage, rounded up.

Measure before you buy

For a simple rectangular room, measure the longest finished length and width at floor level. For closets, alcoves and L-shaped spaces, divide the room into rectangles, calculate each section and add them together. Do not rely only on a real-estate floor-plan area because wall thickness and room boundaries can differ from the actual installation area.

Straight lay patterns often use about 5–10% waste; diagonal or complex layouts may need more.
Check whether the manufacturer requires flooring from the same production lot for consistent color.
Keep spare planks from the original order for damaged-board replacement later.

Common questions

How much extra flooring should I buy?

A 5–10% allowance is common for straightforward layouts. Herringbone, diagonal layouts and rooms with many cuts often need more.

Do I include closets?

Yes, if the new flooring will continue into them.

What is box coverage?

It is the total square footage of flooring contained in one unopened carton and is usually printed on the box.

Can I use this for tile?

For tile, use the tile calculator because tile dimensions and piece count also matter.

Why does the result round boxes up?

Retail flooring is sold in full boxes, so a partial calculated box still requires buying another carton.

Worked example: Flooring Calculator

Using the example inputs shown in the calculator — Room length (ft) = 16, Room width (ft) = 12, Waste allowance (%) = 10, Coverage per box (sq ft) = 23.8 — the result is 211.2 sq ft. This demonstrates the formula with a complete set of numbers rather than a hidden assumption.

The result breakdown also shows Room area: 192 sq ft; Boxes needed: 9. Replace the example values with field measurements and the exact product coverage, yield or package size you plan to buy.

For this flooring calculator, the inputs with the greatest practical effect are room length, room width and waste allowance. Recalculate when any of those change; do not reuse a result from a different room, run, layer depth or product specification.