Length loss
Mistake: Entering 0.5 when you mean 50%.
Fix: Enter 50 for 50%; 0.5 represents 0.5%.
Calculators · Free
Measured loom-warp planner
Estimate warp ends and yarn from measured finishing losses.
01Enter your values
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02Measured loom-warp planner
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How it works
Estimate warp ends and yarn from measured finishing losses.
N = ceil(W × d / (1 − sW)); L₁ = L / (1 − sL) + w; T = N × L₁
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Your data stays yours
Inputs are processed on this page and are never sent to a server.
About this tool
Use tool ↑Estimate warp ends and yarn from measured finishing losses.
Divide finished length and width by their separate retained fractions. Multiply loom width by warp density and round ends up. Add fixed loom waste after length correction; multiply length per end by ends.
How to use it
- Enter your values
Finished length · Finished width · Warp density · Length loss · Width loss · Loom waste per end
- Calculate / generate
Estimate warp ends and yarn from measured finishing losses.
- Result
Total warp: 484.555556 m Warp ends: 178 Length per end: 2.722222 m
Calculation method
- Divide finished length and width by their separate retained fractions.
- Multiply loom width by warp density and round ends up.
- Add fixed loom waste after length correction; multiply length per end by ends.
N = ceil(W × d / (1 − sW)); L₁ = L / (1 − sL) + w; T = N × L₁
Measured loom-warp planner
- Finished length
- 2 m
- Finished width
- 40 cm
- Warp density
- 4 1/cm
- Length loss
- 10 %
- Width loss
- 10 %
- Loom waste per end
- 0.5 m
Result
Total warp: 484.555556 m Warp ends: 178 Length per end: 2.722222 m
Frequently asked questions
Scope and workshop checks
Use measured longitudinal and transverse losses, not a generic shrinkage promise. Density describes the loom, not the finished fabric. Waste is fixed per end and is not shrunk. No weft, selvedge extras, threading repeats or strength check.
Where does my data go?
Calculations run on your device. Form inputs are not sent to a server.
Terms and definitions
Enter your values
- Measurement system
The initial choice follows your browser region. Your choice is remembered on this device. Gallons are US gallons. Switching units keeps your numbers unchanged and interprets them in the new unit.
Numbers stay unchanged. Check the new unit and enter the intended measurement, or select an example for that system.
- Finished length
Divide finished length and width by their separate retained fractions.
Enter a numerical value for this quantity. Use the unit shown beside this field. m / ft
Minimum: 0.001 · Maximum: 100000 m
- Finished width
Divide finished length and width by their separate retained fractions.
Enter a numerical value for this quantity. Use the unit shown beside this field. cm / in
Minimum: 0.001 · Maximum: 100000 cm
- Warp density
Multiply loom width by warp density and round ends up.
Enter a numerical value for this quantity. Use the unit shown beside this field. 1/cm / 1/in
Minimum: 0.001 · Maximum: 100000 1/cm
- Length loss
Divide finished length and width by their separate retained fractions.
Enter a percentage, not its decimal fraction: 50 means 50%. Use the unit shown beside this field. %
Minimum: 0 · Maximum: 99 %
- Width loss
Divide finished length and width by their separate retained fractions.
Enter a percentage, not its decimal fraction: 50 means 50%. Use the unit shown beside this field. %
Minimum: 0 · Maximum: 99 %
- Loom waste per end
Add fixed loom waste after length correction; multiply length per end by ends.
Enter a numerical value for this quantity. Use the unit shown beside this field. m / ft
Minimum: 0 · Maximum: 100000 m
Result
- Result
Divide finished length and width by their separate retained fractions. Multiply loom width by warp density and round ends up. Add fixed loom waste after length correction; multiply length per end by ends.
Calculated from your entries using the method below.
- Total warp
Multiply loom width by warp density and round ends up.
Calculated from your entries using the method below.
- Warp ends
Multiply loom width by warp density and round ends up.
Calculated from your entries using the method below.
- Length per end
Divide finished length and width by their separate retained fractions.
Calculated from your entries using the method below.
- Value
Divide finished length and width by their separate retained fractions. Multiply loom width by warp density and round ends up. Add fixed loom waste after length correction; multiply length per end by ends.
Calculated from your entries using the method below.
- Unit
Divide finished length and width by their separate retained fractions. Multiply loom width by warp density and round ends up. Add fixed loom waste after length correction; multiply length per end by ends.
Calculated from your entries using the method below.
Common mistakes and quick fixes
Finished length · Finished width · Warp density
Mistake: Changing units and assuming the entered numbers were converted.
Fix: Numbers stay unchanged. Check the new unit and enter the intended measurement, or select an example for that system.
Scope and workshop checks
Mistake: Treating a result as valid outside the described scope.
Fix: Use measured longitudinal and transverse losses, not a generic shrinkage promise. Density describes the loom, not the finished fabric. Waste is fixed per end and is not shrunk. No weft, selvedge extras, threading repeats or strength check.
Limits and key assumptions
- Use measured longitudinal and transverse losses, not a generic shrinkage promise. Density describes the loom, not the finished fabric. Waste is fixed per end and is not shrunk. No weft, selvedge extras, threading repeats or strength check.
- Displayed results may be rounded; rounding does not add measurement precision.