Flooring Calculator
Size your project in minutes—this tool converts room dimensions into total floor area, factors in waste for cuts and patterns, and translates that into the number of boxes (or square yards) to buy. It’s ideal when you’re budgeting a remodel, comparing materials, or making sure you won’t run short mid-install or overspend on leftovers.
The Flooring Calculator lets you enter one or multiple rooms, choose units, set a waste buffer, and specify tile/plank size, coverage per box, and price. The goal is a clear materials and cost plan you can act on—accurate quantities, an estimated total, and a shareable summary for quotes or store trips. Enter your measurements below to get started.
Estimate floor area, pieces, and boxes for tile, hardwood, laminate, or carpet—add multiple rooms, choose a layout, and include overage.
Room dimensions
Material / packaging
Tip: coverage per box varies by product—check the label for exact square footage.
Flooring Results
Results interpretation
- Overage covers cuts and defects. For simple square rooms, 5–10% is common; for diagonal or herringbone layouts, 10–15% is safer.
- Boxes are rounded up. Manufacturers pack whole-box quantities only.
- Piece counts are approximate. Grout joints, plank staggering, and pattern repeats influence the final number.
How the flooring estimate works
Formulas, steps, and assumptions
Area: sum of (length × width) across rooms in square feet.
Overage: user waste % + layout adjustment (0% straight, ~5% diagonal, ~10% herringbone, ~3% random).
Boxes: ceil(total_with_overage ÷ coverage_per_box).
Pieces (optional): each piece area = (width_in × length_in) ÷ 144; pieces = ceil(total_with_overage ÷ piece_area).
Assumptions: rectangular rooms; excludes closets/niches unless entered as separate rooms; grout/expansion gaps not modeled.
Use cases & examples
Example 1 (single room, tile): 12×10 ft room = 120 sq ft. With 10% user waste and diagonal layout (+5%), overage = 15%. Total = 138 sq ft. If each box covers 20 sq ft → 7 boxes.
Example 2 (two rooms, laminate): 10×11 + 9×14 = 244 sq ft. Random plank (+3%) and 7% user waste → 10% total. Order ≈ 268.4 sq ft → with 23.6 sq ft/box ≈ 12 boxes.
Example 3 (pieces): 6″×36″ LVP has area 1.5 sq ft/piece. For 300 sq ft with 10% overage → 330 sq ft → ≈ 220 planks.
Flooring calculator — FAQ
How much extra flooring should I buy?
For square rooms with straight lay, 5–10% is typical. Diagonal or herringbone patterns often need 10–15% due to extra cuts.
Does the calculator include grout joint width?
Piece counts assume nominal tile sizes. Grout joints and pattern repeats can shift totals; check the manufacturer’s recommendations.
What if my room isn’t a perfect rectangle?
Break the space into rectangles (e.g., a main area plus an alcove) and enter each as a separate room.
How accurate are box counts?
We round up to full boxes using the coverage you enter. Coverage per box varies by product and may exclude waste.
Do I need more material for diagonal or herringbone layouts?
Usually yes. Diagonal adds around 5% and herringbone around 10% more waste versus straight lay. Our layout setting includes this.
Can I use this for carpet?
Yes for area and box-like rolls by coverage, but carpet also depends on roll widths and seam plans that aren’t modeled here.
Planning flooring and tile like a pro
We designed this calculator to make takeoffs fast and dependable. Multi-room inputs, layout-aware overage, and optional piece counts help you order the right amount—without running short.
Choosing an overage percentage
For simple layouts and square rooms, 5–10% is usually enough. If you expect complex cuts, pattern matching, or lots of doorways and alcoves, move toward 10–15%.
Layout and pattern considerations
Diagonal and herringbone patterns create more offcuts. Many installers add at least five points of extra material for diagonal runs and ten for herringbone. Always confirm manufacturer guidance.
Box coverage and dye lots
Boxes from different dye lots may shift slightly in color. Order once, check the lot labels, and blend from multiple boxes during installation.