How to Measure a Room for a Sofa
The sofa calculator needs two numbers: your room's length and width. Here's exactly how to get them.
What you need
- A tape measure (a laser measure is faster but not required).
- Someone to hold the other end, or a tape measure with a locking clip.
Step 1 — Find the wall you're placing the sofa against
Measure that wall from corner to corner, floor level, along the baseboard. This is your room length if it's the longer of the two walls, or your room width if it's the shorter one — the calculator lets you place the sofa along either.
Step 2 — Measure the perpendicular wall
Turn 90° and measure the adjoining wall the same way, corner to corner along the baseboard.
Tips for accuracy
- Measure at floor level, not at chair-rail or crown-moulding height — trim can make a room narrower higher up.
- If a doorway, closet, or fireplace breaks up the wall, measure the full wall length anyway. The calculator treats the room as a simple rectangle in Phase 1 and doesn't yet account for obstacles.
- Round down slightly if you're unsure — it's safer to slightly under-measure a room than over-measure it.
- Note the units on your tape (cm or inches) so you select the matching unit in the calculator.
Example
A living room measuring 4.0 m along one wall and 3.2 m along the other would be entered as room length 400 cm and room width 320 cm (or you can enter in feet and inches — the calculator converts automatically).