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Flooring Calculator: How Many Boxes Do You Need?

This free flooring calculator works out how many boxes of laminate, vinyl plank or wood flooring to buy. Enter the room size, a waste allowance and the coverage printed on the box.

By Debmedia Technologies LLP · Kolkata, India · Updated

What Is It and When Do You Need It?

Flooring is sold in boxes, and running short means a second order that may not match. A careful count with a waste allowance avoids that.

Enter the room size and the box coverage and read how many boxes to buy.

How to Use This Tool

  1. Enter the room length and width.
  2. Enter the coverage per box.
  3. Choose a waste allowance and add a price if you wish.
  4. Press Calculate.

How the Calculation Works

Area = length × width. Area with waste = area × (1 + waste). Boxes = area with waste ÷ coverage per box, rounded up. The cost is the number of boxes times the price per box.

Worked Example

A room of 5 m by 4 m is 20 m². With 10% waste you need 22 m². At 2.2 m² per box, that is 10 boxes, which cover 22 m².

Common Uses

  • Laminate and vinyl floors.
  • Engineered wood.
  • Budgeting a renovation.
  • Comparing products by cost per square metre.

Tips and Common Mistakes

  • Measure at the widest points.
  • Add the area of closets and alcoves.
  • Keep a box or two for later repairs.

Next, you may need the mortgage calculator, staircase calculator, gravel and mulch calculator, electricity cost calculator.

Everything runs in your browser. Nothing you type is uploaded, stored or sent to any outside service.

Frequently Asked Questions

About 10 percent for a straight layout and 15 to 20 percent for diagonal or patterned layouts, to cover cuts, damaged planks and future repairs.
It is printed on the box and in the product details, usually in square metres or square feet.
Yes. Boards from different batches can differ in shade, so buy all your flooring at once.
No. Underlay is bought by the area of the room, with no waste, in rolls of a set size.

Disclaimer: results are calculated in your browser from the numbers you enter. Check important results before you rely on them for money, health, safety or legal decisions.