Understanding your result
The headline is the boxes to buy, with the tiles, the primer and, for a glue-down floor, the adhesive beside it. The table gives the tile size and its area, the tiles with waste, the boxes and what they cover, the primer and the adhesive.
Tiles is the floor area divided by one tile’s area, plus the waste for the layout, rounded up. Vinyl tiles are laid butted with no joint, so unlike ceramic tile there is no joint to add to the pitch, and the count is simply area over face. Boxes come from the tiles per box on the label, not from a square-foot coverage, because peel-and-stick is often sold by piece count.
Primer is counted for every floor, because most peel-and-stick makers require it on anything porous and recommend it on everything else; if your floor is already sealed and your tile’s instructions say no primer, ignore the line. Adhesive appears only for glue-down LVT and includes 10% for what stays on the trowel. If the floor needs leveling before any of this, the self-leveling compound calculator works out the bags; for plank-shaped vinyl, the vinyl plank calculator is the better fit, and ceramic tile with grout joints is on the floor tile calculator.
How we calculate this
Coverage figures are typed as printed: square feet per gallon in US units, square metres per litre in metric. The waste percentages come from the waste factors reference. The subfloor prep guide explains how flat and clean a floor must be for self-adhesive tile, which is flatter and cleaner than most people expect, and the LVP buying guide applies equally to printed vinyl tile.
The assumptions behind the numbers
| Assumption | Default | Where it comes from |
|---|---|---|
| Tile size | 12 × 12 in (30 × 30 cm) | The standard peel-and-stick format |
| Tiles per box | 20 | Common packaging for 12 × 12 in peel-and-stick (20 or 30 per box) |
| Waste | 10 / 15 / 20% by layout | Industry rule of thumb, see the waste factors page |
| Primer coverage | 300 sq ft per gallon (7.4 m² per L) | Typical floor primer data sheets recommended by vinyl tile makers |
| Adhesive coverage | 175 sq ft per gallon (4.3 m² per L) | Pressure-sensitive LVT adhesive data sheets: 150 to 200 with a fine notch |
| Asbestos warning | resilient flooring before the mid-1980s | US EPA guidance on asbestos in resilient floor covering |
Assumptions last reviewed October 8, 2026.
The calculator does not judge whether the old floor is fit to tile over, and it gives no procedure for removing old resilient flooring: if it may contain asbestos, have it tested and follow the EPA guidance. It does not count transition strips or quarter round, and it assumes a single tile size; a border is a second run. The guide to removing old flooring covers what to do when the old floor has to come up.
Two worked examples
A 9 × 6 ft laundry room in 12 × 12 peel-and-stick
Straight layout, 20 tiles per box, primer at 300 sq ft per gallon.
- Floor area: 54 sq ft; tiles 54 × 1.10 = 59.4, rounded up to 60
- Boxes: 60 ÷ 20 = 3 boxes
- Primer: 54 ÷ 300 = 0.18 gallon, so a quart
A Saturday job: three boxes and a quart of primer. Most of the time goes into cleaning and priming the floor, which is the step that decides whether the tiles are still down in a year.
240 sq ft of glue-down 12 × 24 LVT
Straight, 10 tiles per box at $36, adhesive at 175 sq ft per gallon.
- Tiles: 240 ÷ 2 × 1.10 = 132 tiles
- Boxes: 132 ÷ 10 = 13.2, rounded up to 14 boxes, $504
- Primer: 240 ÷ 300 = 0.8 gallon; adhesive 240 ÷ 175 × 1.1 = 1.5 gallons
A 2 gallon pail of adhesive covers it with a little over. The adhesive is spread with the trowel named on the pail and left to flash off before the tiles go in; laying into wet adhesive makes it ooze up the joints.
Where to find your inputs
Tile size and tiles per box. On the box. Peel-and-stick boxes often give only the piece count.
Room or area. Wall to wall, including closets. The floor area calculator adds up odd rooms.
Primer and adhesive coverage. On the container’s data sheet, for the trowel or roller named there.
Installation type. On the box: “peel and stick”, “self-adhesive” or “glue-down”.
Common mistakes
- No primer on concrete or plywood. Self-adhesive tiles pop off porous floors. Prime.
- Tiling over a dusty floor. Dust is the main reason peel-and-stick fails. Vacuum, then damp-mop, then prime.
- The wrong trowel for LVT adhesive. A bigger notch doubles the adhesive and makes it ooze.
- Sanding old vinyl tile. It may contain asbestos. Do not sand or scrape; test first.
- Cold tiles and a cold floor. The adhesive needs room temperature. Acclimate the boxes for 48 hours.
- Ignoring the floor’s flatness. Thin tile shows every bump. Level the floor first.
Questions people ask
- How many peel-and-stick tiles do I need?
- Divide the floor area by the area of one tile and add 10%. A 9 × 6 ft laundry room is 54 sq ft; in 12 × 12 inch tiles that is 54 tiles, 60 with waste, which is three boxes of 20. In 12 × 24 inch tiles it is 30 tiles, 33 with waste.
- Do I need primer under peel-and-stick tile?
- Most makers require a floor primer on porous surfaces such as concrete and plywood, and on any floor that is dusty or slightly chalky, because the self-adhesive needs a sealed, clean surface. Primer covers about 300 sq ft per gallon, so a small room needs a quart.
- How much adhesive for glue-down LVT?
- Pressure-sensitive LVT adhesive spreads about 150 to 200 sq ft per gallon with the fine-notch trowel the maker specifies. A 240 sq ft floor at 175 sq ft per gallon needs about 1.4 gallons, 1.5 with the usual allowance, so a 2 gallon pail.
- Can I put peel-and-stick tile over old vinyl?
- Usually yes, if the old floor is a single layer, smooth, well bonded and not cushioned, and the maker's instructions allow it. Leaving old tile in place is often safer than removing it, because vinyl tile and black adhesive from before the mid-1980s may contain asbestos.
- What is the difference between LVT and peel-and-stick?
- Both are vinyl tile. LVT (luxury vinyl tile) is thicker, has a deeper wear layer and is glued down or clicked together; peel-and-stick has its adhesive already on the back and is thinner and cheaper. The counting is the same; the setting materials differ.
- How much waste for vinyl tile?
- 10% for a straight grid, 15% on the diagonal. Vinyl tile cuts with a knife and offcuts are often reusable at the opposite wall, so the waste rarely exceeds those figures in an ordinary room.