Sofa Size Calculator
Find the perfect couch proportions for your space. Keep walkways comfortable and seating cozy with sizing tips tailored to your layout.
Allow 30–36" for comfortable traffic flow.
Floating sofas typically need 12–18" to breathe behind them.
Sofa Size Recommendations
Maximum footprint
Length up to 15 ft
Depth up to 11 ft with a comfortable 3 ft in front and 3 ft total side clearance.
Ideal seat depth
Target depth between 10 ft and 3.5 ft for relaxed lounging.
Estimated seating capacity: 7 people.
Best-fitting standard sizes
Oversized
10 ft length
Grand 4-seat
9 ft length
4-seat
8 ft length
How to Use This Calculator
Measure your room
Record wall-to-wall dimensions and note any openings, fireplaces, or built-ins.
Select the sofa layout
Whether it floats in the room or hugs a wall, layout impacts the space you need.
Adjust clearances
Set walkway widths and coffee table spacing to see maximum sofa dimensions instantly.
Formula
Max Sofa Length = Room Length − Side Clearances
Max Sofa Depth = Room Width − (Front Clearance + Back Clearance)
Seats ≈ Max Length ÷ 2 ft
Example: 18 × 14 ft room, floating sofa, 3 ft walkways → Max length 12 ft and depth 8 ft — standard 8 ft sofa fits with room to spare.
Sectional example: 16 ft room width with 3 ft walkways leaves ≈ 10 ft main run and 7 ft chaise.
Styling Tips
Right-sized seating balances the room and keeps traffic moving. Use your sofa dimensions to layer rugs, tables, and accent chairs confidently.
- Leave 14–18" between sofa and coffee table for easy reach.
- Match sofa scale to other seating—avoid one oversized piece surrounded by small chairs.
- Consider modular sofas if doorways or elevators limit delivery size.
- Pair floating sofas with console tables to create visual anchors.
Frequently Asked Questions
How wide should walkways be around a sofa?
Aim for 30–36" for main traffic paths and 24" for light circulation.
What if my room is very small?
Consider a loveseat or apartment sofa (68–72") and use armless side chairs to save space.
Can sectionals fit in narrow rooms?
Yes—choose compact returns (6–7 ft) and leave at least 3 ft of walking space at the open end.
How deep is too deep?
Depths above 42" feel loungey but can overwhelm small spaces. 36–40" suits most households.