upholstery foam estimator

Before you cut a single piece of fabric, run your project through a simple upholstery foam estimator: measure, choose a thickness, and pick a firmness that fits how the piece will be used. Getting these three numbers right saves you from wasted foam, gappy cushions, and covers that never sit quite right.

How to Estimate Upholstery Foam

Measure the Frame or Old Cushion

Record the length and width of the seat or back you're filling. If you're replacing a worn cushion, measure the frame rather than the sagging foam, since old cushions shrink and compress over time.

Choose Your Thickness

Think about the seat height you want. Dining chairs usually call for thinner pads, while sofas, benches, and window seats often need deeper foam for comfort. A good foam size calculator habit is to round up slightly so the cover fits snugly.

Match Density to Use

• Firmer foam for seats that get daily use
• Softer foam for backrests and accent pillows
• Outdoor-suitable foam for patio cushions exposed to moisture

Find the Right Foam for Your Project

Once you know how much foam you need, browse the upholstery foam options below and compare sizes, thicknesses, and firmness to match your measurements.