Quilt Binding Calculator
Binding Yardage for Common Quilt Sizes
Double-fold binding, 2.5" strips, 42" WOF fabric
| Quilt Size | Perimeter | Binding Needed | Strips | Fabric (yd) |
|---|---|---|---|---|
| Baby (36×52) | 176" | 188" | 5 | 0.35 |
| Throw (50×65) | 230" | 242" | 7 | 0.49 |
| Twin (65×87) | 304" | 316" | 8 | 0.56 |
| Full (80×87) | 334" | 346" | 9 | 0.63 |
| Queen (88×92) | 360" | 372" | 10 | 0.69 |
| King (105×92) | 394" | 406" | 11 | 0.76 |
How We Calculate This
This quilt binding calculator uses established formulas and industry-standard data to provide accurate estimates.
- Enter your specific values into the calculator fields above
- Our algorithm applies the relevant formulas using your inputs
- Results are calculated instantly in your browser — nothing is sent to a server
- Review the detailed breakdown to understand how each factor affects your result
These calculations are estimates based on standard formulas. For critical decisions, always consult a qualified professional.
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Quilt binding wraps around the raw edges to finish the quilt. You need enough strip length to go around the perimeter plus extra for joining and corners.
The basic rule:
- Perimeter = 2 × (width + height)
- Total binding = perimeter + 10–12 inches extra for corners and joining
- Strips per fabric width (WOF): each strip yields ~40 usable inches from 42" fabric
- Number of strips = total binding ÷ usable strip length, rounded up
- Fabric yardage = number of strips × strip cutting width ÷ 36
Double-fold binding (cut at 2.5") is the standard for quilts. It creates a durable finished edge roughly 3/8" wide. Single-fold binding is thinner and used mainly for wall hangings.
When Would You Use This Calculator?
This quilt binding calculator is designed for anyone who needs quick, reliable estimates without complex spreadsheets or professional consultations.
- When you need a quick estimate before committing to a purchase or project
- When comparing different options or scenarios side by side
- When planning a budget and need to understand potential costs
- When you want to verify a quote or estimate you've received from a professional
- When teaching or learning about the concepts behind these calculations
Frequently Asked Questions
What width should I cut binding strips?
For double-fold binding, cut strips 2.25" to 2.5" wide. The standard is 2.5" which finishes to about 3/8" visible binding. For single-fold, cut 1.25" to 1.5" strips.
Should I cut binding on the bias?
Straight-grain binding works for straight-edged quilts and uses less fabric. Bias binding stretches and is essential for curved edges or scalloped borders. Bias requires about 20% more fabric.
How much extra binding do I need?
Add 10-12 inches beyond the perimeter for mitering corners and joining the binding ends. This calculator includes that extra automatically.
How do I join binding strips?
Join strips with diagonal seams (45-degree angle) for a less bulky join. Place strips right sides together at a right angle and sew corner to corner diagonally. Trim to 1/4" seam allowance and press open.