Warp length
Builds total length from finished length, pieces, shrinkage, take-up, loom waste, sampling, hems, headers, and safety margin.
iPhone · iPad · Mac
Warp planning without the scratch paper.
WarpWise helps handweavers calculate warp length, width in reed, total ends, and yarn requirements while accounting for take-up, shrinkage, draw-in, loom waste, sampling, hems, headers, and safety margin.
No account. No tracking. No ads. No network required.
WarpWise
Inches · Cotton towels
Finished length28in
Finished width18in
Sett20EPI
Take-up7%
Warp Plan
Measure per end2.43 yd
Total ends419
Total warp yarn1017.85 yd
Measure with confidence
All the warp math in one focused tool.
Enter the finished project, yarn behavior, loom allowances, and color end counts. WarpWise updates the full plan immediately and keeps the major numbers easy to read.
Width in reed
Accounts for width shrinkage and draw-in before calculating the reed width and base warp ends.
Total ends
Add floating selvedges and extra border ends to the calculated base ends.
Color yarn
Track yarn amounts for Color A, Color B, Color C, or as many additional warp colors as needed.
Presets
Start with common settings for cotton towels, wool scarves, rigid heddle weaving, or tapestry, then customize.
Units
Switch between inches and centimeters. Outputs convert to yards or meters for yarn totals.
Universal
Runs on iPhone, iPad, and Mac through Mac Catalyst with keyboard-friendly entry on Mac.
Share and save
Name a warp plan, then share, print, or save it for the project binder.
Loom view
A quick visual summary shows the planned reed width and warp length at a glance.
Questions
FAQ
What does Total to measure per end mean?
It is the length to wind for each warp end after accounting for finished length, shrinkage, take-up, loom waste, sampling, hems or fringe, headers, and safety margin.
Where do unassigned ends come from?
Unassigned ends are total warp ends that have not been assigned to a color row. Add more color ends or adjust the current color counts to reduce that number.
Does WarpWise support more than three colors?
Yes. Start with three color rows and add more as needed.
Does WarpWise collect data?
No. WarpWise does not collect analytics, personal information, location data, project data, or tracking data.
Does it require the internet?
No. The calculator works locally on your device.