Yarn Length Estimator
Estimate yarn demand from a sample’s measured use and finished area.
Your inputs
Calculation results
Formula & assumptions
Length = sample length × project area/sample area; stitch pattern and tension must match.
Values use the specified units. Calculations use floating-point arithmetic. Check input measurements and formula assumptions before applying the result.
Compare your scenarios
Save up to five results to compare changes side by side. Scenarios stay in this tab until you clear or reload it.
Using Yarn Length Estimator
Estimate yarn demand from a sample’s measured use and finished area.
- Enter sample width, sample height, sample yarn used, project area, extra allowance using the units printed under each field.
- Choose Calculate, or enable live updates. Review the result labels and formula assumptions.
- Save scenarios to compare up to five variations, then copy the report or download JSON or CSV.
Example
Sample width: 10 centimeters Sample height: 10 centimeters Sample yarn used: 8 meters Project area: 12000 square centimeters Extra allowance: 15 percent Base yarn · meters: 960 Planned yarn · meters: 1104
Questions & answers
What does Yarn Length Estimator calculate?
Estimate yarn demand from a sample’s measured use and finished area.
Which units should I enter?
Sample width uses centimeters. Sample height uses centimeters. Sample yarn used uses meters. Project area uses square centimeters. Extra allowance uses percent. Convert values to these units before calculating.
Which formula does it use?
Length = sample length × project area/sample area; stitch pattern and tension must match.
What does the included example show?
Sample width: 10 centimeters; Sample height: 10 centimeters; Sample yarn used: 8 meters; Project area: 12000 square centimeters; Extra allowance: 15 percent. Result: Base yarn · meters = 960; Planned yarn · meters = 1104.
Can I compare different settings?
Yes. Save a scenario, change the inputs and save another result. Up to five scenarios are compared in this tab; they disappear when you reload or leave.
Can I export the calculation?
Copy the JSON report or download JSON and CSV with inputs, result labels and numeric values. Processing uses local JavaScript; no calculation request is sent to our server. Displayed values use up to 10 significant digits; exports retain JavaScript numeric precision.
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