Quilt border strip yardage calculator
Calculate side-first border lengths, finished quilt size and straight-strip fabric needs.
Your measurements
01 / INPUTUse the units shown beside each field. Whole counts must be whole numbers.
Your result
02 / PLANNo saved baseline.
What changes when…
Baseline comparison
Save a baseline, then change your inputs. The difference is current minus baseline. Saved values stay in this browser.
| Result | Baseline | Current | Difference |
|---|
Use the result
Cut side borders to the measured center length, attach them, then measure across again for top and bottom borders.
Assumptions that matter
- Measure the actual quilt through its center before cutting each border.
- These lengths use side borders first and do not describe mitered corners.
- The join allowance is user supplied and must cover your chosen joining method.
- Piecing strips may be necessary even when the total yardage is sufficient.
Common questions
How is the result calculated?
The formula reference shows every equation and defines the input variables. Whole-item results explicitly round to whole quantities where needed.
How should I use the example?
The initial numbers are a worked example. Replace them with measurements from your own project before making a plan. Three calculated scenarios appear on the examples page.
Can I compare two plans?
Yes. Save a baseline, change one or more inputs, and compare the result table. The chart changes only one input at a time.
Does this upload my measurements?
No. Calculations run in this browser. Saving a baseline uses local browser storage; the scenario-link button includes entered numbers in a URL fragment you choose to share.
Need a paper record? Use the measurement worksheet.