Description
Return 2×panels×radialLength×seamAllowance.
Pattern-area estimates simplify pieces into stated geometric models. Seam strips and area-to-length conversions can support planning, but do not prove that a practical cutting layout or finished construction exists.
Return 2×panels×radialLength×seamAllowance.
When to use this tool
Use Skirt Circle Panel Seam Allowance when you need the stated pattern-area or material-budget term.
How to use the tool and how it works
- Enter panels, radialLength, seamAllowance. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read totalAddedArea. Use the output convention below.
Require positive integer panels and nonnegative radial length/seam allowance. Return 2×panels×radialLength×seamAllowance.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| panels | Panels | Required. Safe integer; minimum 1. |
| radialLength | Radial Length | Required. Finite number; minimum 0. |
| seamAllowance | Seam Allowance | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| totalAddedArea | Total Added Area | Required. Finite number. |
{
"input": {
"panels": 4,
"radialLength": 50,
"seamAllowance": 1
},
"output": {
"totalAddedArea": 400
}
}Limitations and assumptions
- This models two rectangular seam strips per panel; corner overlaps and curved allowances are omitted. It is an area estimate, not a complete cutting layout.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use a complete cutting layout and construction sample for production planning. Include grain direction, curved edges, joins, waste and fabric behavior beyond the simplified area model.
References
Similar or alternative tools
- Pocket Bag Seam Net Area
Subtract allowance at both sides of each dimension and multiply net dimensions.
- Bias Strip Length From Square Area
Divide remaining area by stripWidth for length.