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Budget partial balls of the same yarn
Combine comparable usable lengths after identifying material, color and batch.

Related lessons and tools
Combine comparable usable lengths after identifying material, color and batch.
Before you start
Gather the measurements, counts or timing sample needed below. Record their units and whether they describe a sample, the whole project or one purchased package. Use a finished sample when dimensions or material use depend on fabric structure.
How to do it
- Measure remaining material from a label — For one uniform yarn, estimate length from net remaining mass and the original length-to-mass ratio. Remove packaging and keep uncertainty from scale resolution visible.
- Combine compatible leftovers — Sort leftovers by usable length, behavior and care needs before color. Keep separate groups when the yarns cannot substitute within one area.
- Combine component quantities without mixing colors — Two parts using 120 m and 80 m of color A total 200 m before reserve. Color B uses 60 m separately. At 100 m per ball and 10% reserve, buy three A balls and one B ball.
Try this example
Three matching leftovers weigh 20, 35 and 15 g. At 200 m per 100 g they contain about 140 m; subtract unusable ends and keep a reserve before choosing the project.
Check your result
- Recheck the inputs against the actual sample or label, keep units consistent and round only the final count or purchase. Repeat a sample if a small measuring difference changes the decision.
- These arithmetic examples assume the measured structure stays comparable. Shaping, borders, dense textures and color changes require their own allowances or samples.
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