01 / METHOD
How to use this calculator
- Choose the known fabric length unit and use matching units for both widths.
- Enter usable rather than nominal widths.
- Add contingency only if it is not already included in the known requirement.
- Check the converted amount against the actual marker or cutting layout.
02 / APPLICATION
Useful for
- Comparing 44-inch and 58-inch goods
- Quoting an alternate fabric width
- Estimating area-equivalent metreage
03 / BOUNDARIES
Assumptions and limitations
What the estimate assumes
- Material use changes in direct proportion to usable width.
- The same total fabric area can satisfy the job.
What it does not model
- Real layouts change discretely when pieces no longer fit across.
- Does not account for repeat matching, nap, flaws, or marker efficiency.
04 / NOTES
Frequently asked questions
Is this an exact cutting conversion?
No. It is an area-equivalent estimate; verify it with the actual pattern layout.
Can I mix inches and metres?
The length keeps its own unit while the two widths only need to use the same unit. The selector labels the result.