Laminate Flooring Calculator: How Many Planks & Boxes Do I Need? (2026 Cost Guide)
Affordable click-lock floating floor with a photographic wood-look wear layer.
Laminate is one of the cheapest ways to get a wood look and is very DIY-friendly. It floats over a foam or cork underlayment, requires a 1/4"–3/8" expansion gap at walls and should not be used in full bathrooms or areas with standing water unless it's rated waterproof.
1Measure the space
2Board size & layout
Recommended: 10% for straight/offset, 15% for diagonal & herringbone.
3Packaging & price
Printed on the box. 0 = sold individually.
Your Laminate Flooring estimate
Area incl. waste
184.8 sq. ft
planks needed
74
boxes to buy
10
Material cost
$450
- DIY — materials only$450
- Installation labor (pro)$336 – $672
- Hire a pro — total installed$786 – $1,122
Labor at $2–$4 per sq. ft (US average). Doing it yourself saves roughly $336–$672.
Material shopping list
| Laminate Flooring (7 1/2" × 48")74 planks · 200 sq. ft purchased | 10 boxes |
| Underlayment (100 sq. ft rolls)Skip if the planks have a pre-attached pad | 2 rolls |
| Quarter-round / shoe moldingCovers the 1/4"–3/8" expansion gap | Measure perimeter |
168 sq. ft · Offset / Brick · 10% waste. Buy all boxes from the same lot.
How many planks do I need? Quick-reference table
Based on 7 1/2" × 48" planks with 0" joints, 20 sq. ft per box and $2.25/sq. ft material. "Offset / Running bond" uses 10% waste; diagonal/herringbone uses 15%.
| Size | Area + 10% | planks | boxes | planks @ 15% | Material | Installed (pro) |
|---|---|---|---|---|---|---|
| 10×10 ft (100 sq. ft) | 110 sq. ft | 44 | 6 | 46 | $270 | $470–$670 |
| 12×12 ft (144 sq. ft) | 158.4 sq. ft | 64 | 8 | 67 | $360 | $648–$936 |
| 14×12 ft (168 sq. ft) | 184.8 sq. ft | 74 | 10 | 78 | $450 | $786–$1,122 |
| 20×15 ft (300 sq. ft) | 330 sq. ft | 132 | 17 | 138 | $765 | $1,365–$1,965 |
| 20×20 ft (400 sq. ft) | 440 sq. ft | 176 | 22 | 184 | $990 | $1,790–$2,590 |
The laminate flooring formula, step by step
- Measure the area. Multiply length × width in feet. Measure each section separately and add them for L-shapes.
- Add waste. Add 10% for straight or offset layouts and 15% for diagonal or herringbone.
- Find coverage per plank. (plank length + joint) × (plank width + joint) ÷ 144 = sq. ft per plank.
- Count planks. Divide the area including waste by the coverage per plank and round up.
- Convert to boxes. Divide the area including waste by the sq. ft per box and round up to whole boxes.
Worked example — a 14 × 12 ft area is 168 sq. ft. Adding 10% gives 184.8 sq. ft. Each 7 1/2" × 48" plank with a 0" joint covers 2.5 sq. ft, so you need 74 planks — 10 boxes at 20 sq. ft each.
Laminate Flooring cost guide (2026)
- Material: $1.25–$5.00 per sq. ft (calculator default $2.25).
- Professional labor: $2–$4 per sq. ft. Floating installation with underlayment. Old-floor removal, leveling and trim are extra.
- Typical 14×12 project: $450 DIY vs. $786–$1,122 professionally installed.
Pro tips for laminate flooring
- Install underlayment with a vapor barrier over concrete slabs.
- Leave a 1/4"–3/8" expansion gap at every wall, cabinet and door jamb.
- Score-and-snap or use a laminate cutter for clean crosscuts with no dust.
- Don't install kitchen cabinets or islands on top of a floating floor.
Laminate Flooring FAQ
How many boxes of laminate flooring do I need?
A 12×14 ft room is 168 sq. ft; with 10% waste you need 185 sq. ft. At 20 sq. ft per box that's 10 boxes.
Is laminate or vinyl plank better?
Laminate is more scratch-resistant and usually cheaper, while LVP is fully waterproof. Choose LVP for kitchens, baths and basements and laminate for bedrooms and living areas.
Do I need underlayment for laminate?
Yes, unless the planks have underlayment pre-attached. Over concrete, use underlayment with a 6-mil vapor barrier.
How much does laminate flooring installation cost?
Material runs about $1.25–$5 per sq. ft and professional installation $2–$4 per sq. ft, so a 168 sq. ft bedroom typically costs $600–$1,400 installed.