Rounded Cushion Piping Cord Roll calculator.
Measure a supplied rounded rectangle seam path and order continuous piping cord with supplied join tails.
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.
Rounded perimeter = 2(width + height − 4 × radius) + 2π × radius; cord cut = perimeter + supplied total tail extra. Does not choose seam location, corner radius, cord diameter or sewing technique.
A worked example
Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.
- Selected piping cord roll length
- 3 m
- Supplied total tail extra per cushion
- 0.1 m
- Measured seam path width
- 0.5 m
- Measured seam path height
- 0.5 m
- Supplied seam corner radius
- 0.05 m
- Identical paths
- 2
Continuous piping cord rolls: 2 rolls
Continuous cuts use decreasing-length first-fit packing. This is a feasible count, not a guarantee of the minimum. Any per-cut extra is explicitly reserved by you. Measure the actual seam centreline, not the outer foam blank.
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.
Does not choose seam location, corner radius, cord diameter or sewing technique.
All dimensions, properties and application patterns are user-supplied. No building-code default is inserted.
Method: dimensional arithmetic and user-supplied specifications. Software checks: 2026-10-06. Calculation and review policy.