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Yarn Needed for Hat Calculator
Estimate yarn for a knitted hat from head circumference, height and yarn weight.
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Hat yarn
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Estimate yarn for a knitted hat from head circumference, height and yarn weight.
Yarn Needed for Hat Estimator
Enter your numbers below for an instant estimate.
0
💡 Tip: Yarn = (circumference x 0.9 x height x 0.92) / 100 x yards per swatch + extras.
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
Results update as you change the inputs.
3
Review
Read the breakdown and the explanation.
4
Adjust
Change values to compare scenarios.
Quick Reference Guide
Yarn Quick Guide
Typical values for reference.
| Head cm | Height cm | Yd/swatch | Yards |
|---|---|---|---|
| 46 | 16 | 12 | 93 yards |
| 52 | 20 | 12 | 123 yards |
| 56 | 22 | 12 | 143 yards |
| 60 | 25 | 12 | 169 yards |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
Yarn Needed for Calculator FAQ
Answers to common questions about this calculator.
About 130 to 220 yards of worsted weight.
Yes, larger heads need more.
Yarn = (circumference x 0.9 x height x 0.92) / 100 x yards per swatch + extras.
It is an estimate based on the inputs you enter. Check real quotes, labels or official guidance for important decisions.