Free · Everyday planning calculators

Quilt Binding Cut Planner

Estimate binding length, straight-cut strips and bias-binding area from quilt dimensions.

  • Formula & worked example
  • Private in your browser
  • No signup
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Calculator inputs

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How to use this calculator

  1. Enter the known values in the units shown. Results update as you type.
  2. Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
  3. Use the worked example to check the method. Reset restores the starting fields.

Private by default

Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.

Formula and method

A 20 × 30 inch quilt needs 110 inches of binding; 40-inch fabric yields three two-inch strips.

Binding length = perimeter + 10 in; straight strips = ceiling(binding length / fabric width)

Worked example

Enter these known values and leave the other values blank.

Quilt width
50.8 cm
Quilt length
76.2 cm
Binding type
Straight tape
Width of straps
2" (5.08 cm)
Width of fabric
101.6 cm
Length of binding
279.4 cm

Assumptions and limitations

  • The planner adds ten inches for joins and finishing. Straight strips span the supplied fabric width; bias area is a geometric minimum before practical cutting waste. Inch and centimeter recommendations round upward independently. Check seam and corner needs for your pattern.

Common questions

What does this estimate assume?

The planner adds ten inches for joins and finishing. Straight strips span the supplied fabric width; bias area is a geometric minimum before practical cutting waste. Inch and centimeter recommendations round upward independently. Check seam and corner needs for your pattern.

Can I find a missing input?

Clear the unknown field and enter compatible known values. The controls retain supported inverse calculations, while rounded counts and one-way outputs stay directional.

References

Square inches convert with the exact square of 2.54, or 6.4516 square centimeters, before upward tenth-unit rounding. This replaces the rounded 6.452 factor.

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