Box Cushion Fabric Panel calculator.
Calculate rectangular top, bottom and boxing panel area with your specified seam allowances.
Your inputs
Use measurements from your plan and properties from your chosen product. Any prefilled values are illustrative.
A clear estimate starts here.
Enter your dimensions and product details to see the quantity and purchase breakdown.
Formula and assumptions
How this calculation works.
Calculate rectangular top, bottom and boxing panel area with your specified seam allowances. Specified sewing pattern only; not a guarantee of comfort, upholstery suitability or fabric yield.
A worked example
Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.
- Finished cushion length
- 1 m
- Finished cushion width
- 0.5 m
- Finished cushion depth
- 0.2 m
- Specified allowance at each sewn edge
- 0.05 m
- Matching cushions
- 1
Total rectangular cut panel area: 2.34 m²
Six separate rectangular panels per cushion. Zips, piping, shrinkage, pattern alignment and roll layout are excluded.
Before you purchase
Use dimensions from your plan and properties from your chosen product. Any design spacing, section or fixing pattern must already be specified.
Specified sewing pattern only; not a guarantee of comfort, upholstery suitability or fabric yield.
Method: dimensional arithmetic and user-supplied specifications. Software checks: 2026-10-04. Calculation and review policy.