Flooring guide
How to measure a room for flooring
Measure the finished floor area first, then turn that area into a package quantity using the coverage printed on your flooring product.
What you need
- A tape measure (a laser measure helps in large rooms).
- Paper to sketch the room and note each dimension.
- The carton coverage of the product you are considering.
1. Sketch and measure each section
For a simple rectangle, measure the longest length and widest width in feet. Multiply them for square feet. For an L-shaped or irregular room, divide the floor into rectangles, calculate each, and add the areas. The square footage guide shows how to split awkward shapes.
Planning area = total area × (1 + allowance ÷ 100)
2. Include the spaces flooring will reach
Closets, alcoves, and the strip under a doorway threshold are easy to miss. Measure to the point where the new floor will stop, such as the middle of a door opening where it meets another floor.
3. Keep the allowance explicit
Cutting, defects, repairs, and future replacement change the amount you need. A 10% planning example is editable in the calculator; the right allowance depends on material, pattern, room shape, and the installation guidance for your product. See how much flooring waste to add.
4. Convert to boxes
Find the coverage per box on the label. Divide your planning area by that coverage and round up to a whole box. Never round a partial box down.
Common mistakes
- Measuring from a floor plan instead of the actual finished floor.
- Forgetting a closet, alcove, or second section.
- Dividing area by box coverage with no allowance.
- Treating one waste percentage as a universal manufacturer rule.
- Rounding inches down instead of up.