How to Calculate How Many Boxes of Flooring You Need
I built this flooring calculator to help you convert room square footage into box counts — because flooring is sold by the box, not by the plank. Each box covers a certain number of square feet listed on the packaging (typically 20–25 sq ft for hardwood, 15–30 sq ft for laminate, and 20–40 sq ft for LVP). Enter your room dimensions and the box coverage, and I'll tell you exactly how many boxes to buy including the waste you should account for.
The basic formula is: room area ÷ box coverage = boxes needed before waste. Then multiply by (1 + waste percentage) to get your final number, and always round up to the nearest whole box. Returning a partial box is usually possible, but buying short means a second trip with no guarantee the store has the same lot number — which can cause colour variation that's visible across the room.
How Much Waste to Add for Each Flooring Type
The right waste percentage depends on your layout pattern and the flooring type. Here's what I recommend:
- Straight lay (parallel to walls): 7–10% waste for most flooring types.
- Diagonal lay (45-degree angle): add 15% because end cuts are significantly longer.
- Herringbone or chevron pattern: add 20–25% for the extra cuts required at every plank end.
- Irregular rooms with many angles or obstacles: add 15% regardless of pattern direction.
Choosing the Right Flooring for Your Space
Solid hardwood is the premium choice for living rooms and bedrooms — it adds resale value, can be refinished multiple times, and lasts generations. However, it cannot go in rooms with moisture, meaning no solid hardwood in basements, bathrooms, or below-grade spaces. For those areas, luxury vinyl plank (LVP) or tile are the right answers.
Laminate flooring offers the look of hardwood at a lower price point and is more water-resistant than solid wood. Modern laminate with a click-lock system is beginner-friendly and a popular DIY choice. LVP (luxury vinyl plank) is fully waterproof, very durable, and comfortable underfoot with a built-in underlayment layer on many products. For kitchens and bathrooms specifically, LVP has largely replaced laminate as the go-to recommendation because it handles spills and humidity without swelling.
Frequently Asked Questions
Do I need underlayment under flooring?
For most laminate and LVP flooring, underlayment is required and some products come with it pre-attached. A good underlayment provides cushioning, noise reduction, and a moisture barrier above the subfloor. For hardwood floors, a moisture barrier (not foam padding) is typically used. Never double up on underlayment with products that already have it attached — too much cushion causes the click-lock joints to flex and eventually fail.
Should I run flooring in the same direction throughout the house?
For a cohesive look, yes. The standard recommendation is to run planks parallel to the longest wall or parallel to the direction of natural light. Consistent direction across open-plan spaces makes rooms feel larger and eliminates the awkward transition where two directions meet. If you're connecting two rooms with different orientations, use a T-moulding transition piece at the doorway.
How long should flooring acclimate before installation?
Solid hardwood should acclimate in the room for 3–5 days before installation — longer in humid climates. Engineered hardwood and laminate need 48 hours. LVP typically requires only 24–48 hours but should be stored flat (not on end) during acclimation. Proper acclimation prevents the planks from expanding or contracting after installation, which can cause gaps or buckling.
