Flooring Calculator
Work out exactly how much flooring you need — total area, boxes to buy, and total cost — across one or many rooms.
Rooms
Floor plan preview (to scale)
1 unit = 0.11 ftTypical: 5–10% straight lay, 10–15% diagonal, 15–20% herringbone.
Your estimate
About Flooring Calculator
The Flooring Calculator helps you quickly estimate how much flooring material to buy for a project. Enter the dimensions of every room you're flooring, choose a waste percentage that matches your install pattern, and the calculator gives you a clean total — area, boxes, and cost — so you can confidently order without overbuying or coming up short.
It works for any flat flooring type: laminate, hardwood, luxury vinyl plank (LVP), engineered wood, tile, vinyl roll, or carpet. Toggle between feet and meters depending on where you live or what your supplier uses.
How to Use Flooring Calculator
- 1 Pick your unit. Toggle Feet or Meters at the top of the Rooms card. All inputs and results will use the chosen unit.
- 2 Enter each room. Type the length and width of every room you're flooring. Click "Add another room" for additional spaces — kitchen, hallway, bedroom — and the calculator sums them all.
- 3 Set the waste percentage. Use the slider to match your install pattern. 10% is a safe default for most straight-lay floors.
- 4 (Optional) Add box coverage and price. Tick "Include" under Cost estimate, then enter how much area a single box covers and how much it costs. The estimate card will show boxes-to-buy and total cost.
- 5 Read the estimate card. The orange panel on the right always shows your total area, the area-with-waste (this is what you actually buy), boxes, and cost.
Frequently Asked Questions
How much waste should I add? ▾
A standard straight-lay install is fine at 5–10%. Use 10–15% if the room is irregular or if you're cutting around lots of obstacles. Diagonal installs and herringbone patterns waste more — plan 15–20%. If you're buying premium flooring you want extra leftover for future repairs, lean toward the higher end.
Should I include closets and doorways? ▾
Yes, if you're flooring them. Add each closet as a separate room. For doorways, measure to the centerline of the threshold or simply round the connected rooms up slightly — the waste percentage usually absorbs this.
What about L-shaped or irregular rooms? ▾
Split irregular rooms into rectangles and add each rectangle as a separate "room" in the calculator. An L-shape is two rectangles, a T-shape is three. The totals will combine correctly.
Where do I find the box coverage? ▾
Every flooring product lists "coverage per box" or "sq ft per carton" on the product page or the side of the box. Common laminate and LVP boxes cover 18–25 sq ft (about 1.7–2.3 m²). Hardwood boxes are similar but vary more by plank length.
Does this work for carpet or tile? ▾
Yes for the area calculation. For carpet sold by the linear yard, you'll need to convert the area to rolls separately using the roll width. For tile, use the "box covers" field with the carton's stated coverage; pattern alignment may need extra waste on top.
Is my data saved or sent anywhere? ▾
No. Everything runs in your browser. Your room dimensions and prices never leave your device and nothing is stored on a server.