Free Flooring Material Calculator
Enter your room dimensions to get the total square footage, a waste allowance, and exactly how many boxes of flooring to buy. Works for laminate, vinyl plank, engineered hardwood, and tile.
Your rooms
×
You'll need
Total floor area0 sq ft
With 10% waste0 sq ft
Boxes to buy
0
at 20 sq ft per box
Estimate only. Always confirm box coverage on the product label and buy from the same dye lot. Round up — you'll want offcuts for repairs.
How to calculate flooring materials
- Measure each room in feet (length × width) and add the areas together.
- Add a waste factor — 10% for straight lays, more for diagonal or herringbone.
- Divide by the box coverage printed on the product (commonly 18–24 sq ft per box).
- Round up to the next whole box, and buy from a single dye lot.
The formula is: boxes = ceil( total_sq_ft × (1 + waste%) ÷ coverage_per_box ).
Stop measuring floors by hand
ProBuildCalc turns your iPhone's LiDAR scanner into a job-site measuring kit — walk the space and it captures the square footage, material takeoff, and a blueprint automatically. No tape measure, no graph paper.
Flooring calculator FAQ
- How do I calculate the square footage of a room?
- Multiply the room's length by its width in feet. For an L-shaped or multi-room job, split it into rectangles, calculate each, and add them together — the calculator above does this when you add more rooms.
- How much extra flooring should I buy for waste?
- Add 10% for a standard straight-lay in mostly square rooms. Bump it to 15% for diagonal layouts or rooms with lots of cuts, and up to 20% for herringbone or chevron patterns. The waste covers cuts, mistakes, and offcuts you'll keep for future repairs.
- How many boxes of flooring do I need?
- Take your total square footage, add the waste percentage, then divide by the coverage printed on the flooring box (often 18–24 sq ft). Always round up to the next whole box — you can't buy a partial box.
- Should all my flooring come from the same dye lot?
- Yes. Color and grain can vary between production runs, so buy all your boxes at once from the same lot number and mix planks from several boxes as you install for a natural look.
More tools: square footage, paint, drywall, concrete.