upholstery foam calculator
How an Upholstery Foam Calculator Helps
An upholstery foam calculator takes the guesswork out of replacing tired, flattened cushions. Instead of eyeballing sizes, you work from a few simple measurements to get the exact foam dimensions to order, so your new seats sit plump, fill their covers snugly, and don't waste material.
Measure Your Cushion Foam Size
- Length and width: Measure the cushion cover seam to seam rather than the old foam, which often shrinks and compresses with age.
- Thickness: Seat cushion thickness is usually greater than back cushion thickness, so match the original or go slightly thicker for extra support.
- Fit allowance: Many upholsterers add about half an inch to length and width so replacement cushion foam fills the cover fully without wrinkles.
Choose the Right Density
Foam density for upholstery affects how a cushion feels and how long it holds its shape. Firmer, higher-density foam suits sofa and dining seats that see daily use, while softer foam works well for backs, headboards, and decorative pillows. Wrapping foam in batting softens the edges and helps your upholstery fabric drape smoothly.
Find Foam That Fits Your Project
Once you know how to measure foam for cushions, ordering is simple. Browse the upholstery foam options below to find the size, thickness, and firmness your next project needs.
