Hardwood and laminate flooring calculator

Every line shows the quantity to buy and how StudSheet got it: the spacing, the waste and the package size, so you can check it before the supply house or the quote.

In Canada (4.27 m × 3.66 m floor)

Set to Canada, the Sheet works the job out again for Ontario: metric sizes, bag sizes, the frost depth and the code notes. It doesn't just convert feet to meters. The first lines:

• 10 boxes, Solid hardwood flooring 19 mm: 15.6 m² + 10% for cuts (straight layout) = 17.2 m² ÷ 1.86 m² per box. Buy it all from one lot so the color matches.
• 1 roll, Asphalt felt #15: 15.6 m² with 102 mm overlaps + 5% = 18.4 m² ÷ 40.1 m² per roll. The NWFA wants a vapor retarder under nailed floors over wood: asphalt felt (ASTM D4869), not plastic.
• 2 boxes of 1,000, Flooring cleats or staples: 189.07 m of 83 mm boards, one fastener every 152 mm (NWFA: 152–203 mm for boards 76 mm and wider), 25–76 mm from each end, + 5% = ≈1,303.
• 1 box, Finish nails (15 or 16-ga): Face-nail the first and last rows, where the nailer can’t reach. Pre-drill hardwood so it doesn’t split.
• 7 pieces, Quarter-round molding: 14.94 m around the room (minus doorways) + 10% for miters. It covers the 19 mm gap.
• 1 box, 18-ga brad nails: Into the wall or the baseboard — never down into the floor.

1. Job site ready: heat or air conditioning running at living conditions (60–80 °F, 30–50% humidity) for at least 5 days, and drywall, paint and other wet work done and dry (NWFA).
2. Let the wood adjust to the room: open the boxes and spread the boards out, then read the boards and the subfloor with a moisture meter each day until the readings stop changing.
3. Prep: pull the baseboards (or just the shoe molding), undercut the door casings and jambs, and scrape, sweep and vacuum the subfloor.
4. Check the subfloor: screw down squeaks and loose spots, flat within ¼″ in 10 ft, and plywood or OSB at 12% moisture or less, within 2% of the boards (NWFA).
5. Roll out #15 felt across the floor, seams overlapped 4″, stapled flat.
6. Snap a starting line ¾″ off the straightest long wall, across the floor joists, and check it for square.
7. First rows: face-nail along the line (pre-drill), then blind-nail through the tongue until there’s room for the flooring nailer.
8. Lay the field from several boxes at once: end joints at least 8″ apart, no H pattern; cleats every 6–8″, 1–3″ from each end.
9. Last rows: rip the final board to leave ¾″ at the wall, pull it tight and face-nail it.
10. Transitions at the doorways, then the trim — nailed to the wall or baseboard, never down into the floor.

Must-have tools first, then the ones that help and the ones to rent for the day.

Mistakes that cost a callback or a second trip

• Skipping the moisture check: Boards laid wetter or drier than the subfloor cup, gap or buckle within a season. Meter both, and wait until they’re within 4% (2% for wide boards).
• No expansion gap: Wood moves with the seasons. Leave ¾″ at every wall, pipe and cabinet, hidden by the trim.
• Boards from one box at a time: Color and length bunch up in patches. Open several boxes and mix them as you go.
• Boards along the joists: Nailed boards run across the floor joists (or diagonally) over a single-layer subfloor, or the floor sags between joists (NWFA).

What the calculator assumes

• +10% for straight layouts, +15% for diagonal, rounded up to whole boxes.
• Expansion gap: ¾″ for ¾″ solid (NWFA).
• Moisture (NWFA): subfloor 12% or less; boards within 4% of it (2% for boards 3″ and wider); HVAC on 5 days before; 60–80 °F and 30–50% humidity. No set number of days to wait — the meter decides.
• Fasteners (NWFA): 1½–2″ cleats or staples every 8–10″ on strip under 3″, 6–8″ on wider boards, 1–3″ from the ends; #15 felt with 4″ overlaps.
• Subfloor (NWFA): at least 5/8″ plywood or 23/32″ OSB on joists 16″ apart; boards across the joists.

The Sheet sets its code notes for the job's state or province. These are New Jersey's and Ontario's; the code reference has more. Always confirm with your building department.

• Permits: a job like this usually needs none, but towns set their own rules. Ask your building department if you're not sure.

What materials do I need to install hardwood or laminate flooring?

For the worked example, a 14′ × 12′ floor, the Sheet counts 8 lines with waste included, starting with solid hardwood flooring ¾″ (10 boxes), asphalt felt #15 (1 roll), flooring cleats or staples (2 boxes of 1,000), finish nails (15 or 16-ga) (1 box). Each line's math is in the table above. Put in your own sizes in the wood floor calculator and every line is counted again.

How long does it take to install hardwood or laminate flooring, and can I do it myself?

About 12 to 18 hours for the worked example, in 10 steps. StudSheet stamps it DIY OK: you can do this.

What tools do I need to install hardwood or laminate flooring?

25 in all. The must-haves start with tape measure (25 ft), carpenter's pencil, chalk line, moisture meter, straightedge (6 ft), miter saw. On the Sheet you mark each one as owned, to buy or to rent.

Stuck while you install hardwood or laminate flooring? Ask in the Hardwood and laminate group of the StudSheet community with this Sheet attached. Homeowners who've done it and verified pros answer, and anyone can read it.

• Flooring for contractors: run this takeoff at your own prices, send the estimate, and get it signed and the deposit paid.
• Carpet a room (14′ × 12′ room): Tack strip, pad, seams and stretching — the full stretch-in install.
• Install vinyl plank flooring (14′ × 12′ floor): Click-together LVP: boxes, trim, transitions and the gaps that matter.
• Tile a floor (8′ × 5′ bathroom): Backer, thinset, tile and grout sized to your tile — bathroom, kitchen or entry, with the toilet reset when there is one.
• Tile a kitchen backsplash (12′ of backsplash, 18″ tall): Tile, adhesive, grout, edge trim and outlet extenders for the wall between the counter and the cabinets, counted from the run and height.
• Tile a shower or tub surround (5′ tub surround, tiled to 7′): Backer board, waterproofing, tile, thinset and grout for a tub surround or a walk-in shower — every seam, corner and pipe sealed.
• Carpet stairs (13 steps, 3′ wide): Carpet, pad and tack strip cut step by step — waterfall or wrapped (Hollywood) — with the pile running down the stairs and the landing included.
• All 45 Sheets, across 16 trades.
• Code reference: frost depths, guard heights, stairs, retaining walls.