Flooring Calculator
Calculate how much flooring material you’ll need, with waste included. Just enter your room size.
Why this much?
Estimate based on the measurements you entered. Box coverage varies by product, so check the packaging for the exact square footage per box.
How the calculator works
This calculator multiplies your room’s length by its width to get the floor area, then adds a waste allowance on top to cover cuts, mistakes, and pattern matching: the offcuts that don’t disappear but also can’t always be reused.
If you enter how much a single box of your flooring covers, we divide your total area (including waste) by that number and round up, so you know exactly how many boxes to put in the cart.
Quick tips for buying flooring
- 10% waste is standard for simple rooms. Bump it up to 15–20% for diagonal layouts, herringbone patterns, or rooms with lots of nooks and closets.
- Buy from the same dye lot. Flooring color can vary slightly between production batches, so buying all your boxes at once avoids a visible mismatch.
- Let planks acclimate first. Many hardwood and laminate products need 48–72 hours in the room before installation to adjust to humidity and temperature.
- Keep a box of extras. Hold back a partial box after installation for future repairs. Matching flooring years later is often impossible.
- Measure the trickiest room twice. Alcoves, closets, and irregular shapes are the most common source of underestimated material.
Typical box coverage by material
| Material | Typical coverage per box |
|---|---|
| Laminate flooring | 18–24 sq ft |
| Engineered hardwood | 20–24 sq ft |
| Vinyl plank (LVP) | 24–30 sq ft |
| Ceramic or porcelain tile | 8–12 sq ft |
| Solid hardwood | 20–22 sq ft |
Frequently Asked Questions
How much extra flooring should I buy?
10% is a safe default for a rectangular room installed straight. Complex layouts, diagonal installs, or rooms with lots of corners benefit from 15% or more.
Do I need to subtract closets or alcoves?
No. If you’re flooring those spaces too, measure them as part of your total length and width, or add their area separately before entering your total here.
What if I don’t know the box coverage yet?
Leave the default of 20 sq ft per box for a rough estimate, then recalculate once you’ve picked a specific product using the coverage listed on its packaging.
Should I round up or down on boxes?
Always round up. Buying one extra box is far cheaper than a second delivery fee or a mismatched dye lot when you run short mid-install.