upholstery foam firmness chart

An upholstery foam firmness chart takes the guesswork out of choosing replacement cushion foam. Whether you're reviving a saggy sofa, padding a dining chair, or building a cozy window seat, matching cushion foam firmness to how the piece is used is the key to comfort that lasts.

How to Read Foam Firmness

Firmness is commonly described by an ILD foam rating (indentation load deflection). The higher the number, the firmer the foam feels. Foam density is a separate measure that relates more to durability, so it's worth checking both before you buy.

Quick Firmness Guide

• Soft: back cushions, throw pillows, and padded headboards where you want a gentle sink.
• Medium: sofa and loveseat seat cushion foam that balances plush comfort with steady support.
• Firm: dining chairs, benches, outdoor seating, and window seats that see heavy daily use.

Choosing the Right Cushion Foam

Think about who sits there, how often, and how thick the finished cushion will be. Thinner cushions generally need firmer foam so they don't bottom out. Want a softer surface on a supportive core? Wrap the foam in a layer of batting before covering it with your upholstery fabric.

Browse the upholstery foam options below to find the firmness and thickness that fit your next project.