Formula
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- Area estimate, not roll-length cutting optimization. Pattern repeats, seams between fabric widths and shrinkage are excluded.
Example Calculation
- Track width: 200 cm
- Fullness multiplier: 2
- Panels: 2
- Side allowance per panel edge: 5 cm
- Cut drop including top/bottom allowances: 250 cm
A 200 cm track at 2× fullness, two panels and 5 cm side allowances gives each panel a 210 cm cut width.
Frequently asked questions
How do I use this calculator?
Enter track width, fullness multiplier, panels, side allowance per panel edge, cut drop including top/bottom allowances. The result updates automatically. Use Reset to restore the example values.
What method does it use?
panel width=track × fullness/panels+2 side allowance; area=panel width × cut drop × panels.. Area estimate, not roll-length cutting optimization. Pattern repeats, seams between fabric widths and shrinkage are excluded.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.