Calculators · Vinyl Plank Flooring Calculator

Vinyl floors

Vinyl Plank Flooring Calculator

Add your rooms to get the boxes and planks of vinyl plank to buy, plus the rows, the last row and the expansion gap.

Area 1

Shape

Length

Width

Waste, from LifeProof and Dotfloor

Pick one to fill the box next to it, or keep Custom.

Waste to add (%)

Empty counts as 0%.

Square feet per box

Optional. Read it on the box. Empty skips the boxes.

Planks per box

Optional. Needs the square feet per box too.

Room width across the rows

Optional. The side the planks run away from, like 10 or 10'6".

Plank width (in)

Optional. The width you see on the floor, like 6 or 7.

Expansion gap, from LifeProof and Dotfloor

Pick one to fill the box next to it, or keep Custom.

Expansion gap (in)

Per wall, like 1/4 or 0.25. Used for the rows.

How to calculate vinyl plank flooring

Vinyl plank is sold in boxes of planks that list the square feet they cover. The job is to turn a floor area into whole boxes. You can read each step in the result above.

Area. Multiply length by width in feet for each room and add them. A 12 ft by 10 ft room is 120 square feet.
Waste. LifeProof says about 10% on its plank and tile guide, so 120 becomes 132 square feet.
Boxes. Divide by the square feet in one box. With 24 square feet per box, 132 ÷ 24 = 5.5.
Round up. You need 6 boxes. That is 144 square feet, so 24 square feet are left over.
Planks. If a box of 24 square feet holds 12 planks, each plank is 2 square feet, so 132 ÷ 2 = 66 planks. The 6 boxes hold 72.

Waste: three guides, three numbers

Vinyl plank is cut with a knife or a saw, and the makers do not agree on how much to add. The guides we opened (checked October 2026) say this:

Maker and guide	What it says
LifeProof, plank and tile (May 2023)	Order approximately 10% more flooring than the square footage to account for cuttings and waste.
LifeProof, herringbone (2018)	Order 20% more flooring than the square footage.
Dotfloor, Empire Collection	Consider adding an additional 5% to allow for cutting waste and grading allowance.

The choice moves the box count. Take a 250 square foot floor with 24 square feet in a box:

Waste	Square feet to buy	Boxes
5%	262.5	11
10%	275	12
20%	300	13

The calculator starts with 10% because it is the figure in LifeProof’s plank and tile guide. Change it to the figure from your own box.

Example: a 12 ft by 10 ft room

Step	Calculation
Area	12 × 10 = 120 sq ft
With 10% waste	120 × 1.10 = 132 sq ft
Boxes of 24 sq ft	132 ÷ 24 = 5.5, rounded up to 6 boxes
Planks, 12 per box	132 ÷ 2 = 66, so 66 planks, and 72 come in the 6 boxes
Rows, 6 in planks, 1/4 in gap	(120 − 0.5) ÷ 6 = 19 full rows and a last row cut to 5.5 in, 20 rows
Perimeter for trim	2 × (12 + 10) = 44 ft, before doorways

Expansion gap and long runs

Vinyl plank floats on the subfloor and still needs room at the walls. Both makers we opened say 1/4 inch around the perimeter and around fixed objects such as cabinets. Two rules matter for large floors. LifeProof requires a T-molding in any area larger than 100 linear feet in any direction, so each section is no bigger than 100 by 100 feet. Dotfloor says that over 30 feet a larger gap is needed, about 1/16 inch more for every additional 10 feet, and asks for a T-molding in doorways and openings between rooms. The calculator shows a warning when one side of a rectangle goes over 30 or over 100 feet.

Before you install

Subfloor. LifeProof’s 2023 plank and tile guide asks for 1/4 inch in 10 feet, with a slope of no more than 1 inch in 6 feet. Dotfloor and LifeProof’s herringbone guide say 3/16 inch in 10 feet.
Acclimation. LifeProof says it is not generally required if the product is stored properly. Dotfloor asks for 1 to 2 days in normal living conditions.
End joints. LifeProof asks for the end joints of neighboring rows to be staggered by more than 8 inches. Dotfloor asks for at least 8 inches.
The last row. LifeProof says that most often the entire length of the last row has to be cut narrow to fit. The guides do not say how narrow it may be, so ask your maker if yours is very thin.

Other floors and tools

To add up a whole house with different floors, use the flooring calculator. For floating laminate there is the laminate flooring calculator, and for nailed or glued boards the hardwood flooring calculator. Vinyl sold by the roll is not covered here.

What this tool does not cover

Layout. It counts from the area. It does not plan where the cuts fall or the stagger of the end joints.
Underlayment. LifeProof planks come with a pad attached, so the calculator does not count underlayment. Read the guide of your product.
Price. No prices are shown, because they change by store and region. Take your numbers to your supplier and ask for a quote.

Frequently asked questions

How do I calculate how much vinyl plank flooring I need?

Multiply the length by the width of each room in feet and add the rooms. Add your waste, divide by the square feet in one box and round up. For a 12 ft by 10 ft room, 120 × 1.10 = 132 square feet. With 24 square feet in a box, that is 5.5 boxes, so 6 boxes. LifeProof asks for about 10% on its vinyl planks.

How many boxes of vinyl plank flooring for 500 sq ft?

It depends on the waste and on the box. With 24 square feet per box, 500 square feet takes 22 boxes at 5% waste, 23 boxes at 10% and 25 boxes at 20%. The steps for 10% are 500 × 1.10 = 550 square feet, then 550 ÷ 24 = 22.92, rounded up to 23.

Is 5% or 10% enough waste for vinyl plank?

The two makers we opened disagree. Dotfloor says to consider adding 5% for cutting waste and grading allowance. LifeProof says to order approximately 10% more on its plank and tile guide, and 20% for its herringbone pattern. Use the figure from the guide of your own product.

How big should the expansion gap be for vinyl plank flooring?

LifeProof asks for 1/4 inch around perimeter walls and heavy fixed objects such as cabinets or baths. Dotfloor asks for 1/4 inch around the perimeter and all fixed objects, and says that when the area is over 30 feet a larger gap is needed, about 1/16 inch more for every additional 10 feet. Check your own guide.

Does vinyl plank flooring need to acclimate?

It depends on the maker. LifeProof says its vinyl does not generally require acclimation when it is stored properly. Dotfloor says to lay the boxes in the install area for 1 to 2 days in normal living conditions. If the guide of your floor asks for it, follow that.

How flat does the subfloor need to be for vinyl plank?

The guides give different numbers. LifeProof’s 2023 guide for plank and tile says 1/4 inch in 10 feet, with the slope not more than 1 inch in 6 feet. Dotfloor and LifeProof’s older herringbone guide say 3/16 inch in 10 feet. Fill low spots and sand high ones before you start.

Do I need a T-molding in a large vinyl plank floor?

LifeProof requires a T-molding in any area larger than 100 linear feet in any direction, so the floor is split into sections no bigger than 100 by 100 feet. Dotfloor asks for a T-molding in doorways and openings between rooms when the floating floor flows into other rooms. The calculator warns you when a side goes over 30 or 100 feet.