Quilt Binding Length
Calculator
Results
- Quilt perimeter (cm)
- 700
- Binding length needed (cm)
- 725
- Strips needed
- 7
- Fabric length needed (cm)
- 45.5
- Fabric length needed (m)
- 0.455
Craft results
| Quilt perimeter (cm) | 700 |
| Binding length needed (cm) | 725 |
| Strips needed | 7 |
| Fabric length needed (cm) | 45.5 |
| Fabric length needed (m) | 0.455 |
formula-map diagram
- Quilt perimeter (cm)
- 700
- Binding length needed (cm)
- 725
- Strips needed
- 7
- Fabric length needed (cm)
- 45.5
- Fabric length needed (m)
- 0.455
Formula breakdown
Formula
B = 2 × (W + L) + 25 ; strips = ceil(B ÷ fabric width)= 700
Note
Simplified model: these are standard craft estimates based on rectangular layouts, quoted gauge and nominal densities. Real fabric nap, directional prints, shrinkage, pattern matching, yarn lots and supplier SAP values vary, so always make a swatch or test piece and buy a little extra.
More in Crafts and sewing
See all →Frequently asked questions
Why is binding length more than just the quilt's perimeter?+
You need extra length beyond the perimeter for the diagonal corner miters and for the diagonal seam that joins the binding strip ends. A common allowance is the perimeter plus about 10-15 inches for corners and the join.
How do double-fold and single-fold binding change the calculation?+
The finished width you choose determines how wide to cut your strips, but the length calculation for the perimeter stays the same either way. Double-fold (French) binding is the more common, more durable choice and doesn't need extra length beyond the standard corner and join allowance.
How many strips do I need to cut to reach that length?+
Divide the total binding length needed by the usable width of fabric (usually 40-42in after trimming selvedges), then round up to a whole number of strips, since partial strips still require a full cut.
What binding strip width should I use?+
A common width is 2.25 to 2.5 inches for double-fold binding, giving a finished width of about 3/8 inch on the front. Wider strips give a wider, more visible binding but consume more fabric.
Why should I round up rather than cut exactly to the calculated length?+
Mitered corners and the diagonal join consume a bit more fabric than the math alone suggests, and running short mid-binding means unpicking stitches to add more. Round up to the next full strip and treat the calculation as a minimum.