custom cut foam calculator

A custom cut foam calculator takes the guesswork out of replacing tired cushions. Instead of buying an oversized slab and trimming it by hand, you enter a few measurements and get foam sized for your bench, window seat, or patio chair. The result is a cleaner fit, less waste, and a cushion that actually looks finished.

How to Measure Before You Calculate

Accurate numbers are what make any foam size calculator useful. Take a moment to measure the space itself, not just the old cushion, since worn foam often shrinks or sags.

• Length and width: Measure the seat area edge to edge at its widest points.
• Thickness: Consider comfort and how the cushion sits with your frame or seat back.
• Shape: Note rounded corners, angles, or cutouts for spindles and arms.

Choosing the Right Foam

Firmness and Use

Dining seats usually call for a firmer feel, while lounge cushions and daybeds benefit from something softer. For patio furniture, look for foam made to handle moisture and dry quickly.

Planning for Fabric

Once your foam size is set, remember to account for seam allowances and any batting wrap when cutting your cover fabric.

Ready to build cushions that fit? Browse the foam and upholstery products below to find the right match for your project.