Quilt Blueprint

Quilt batting calculator

Which batting size to buy for your quilt, or how much off the roll.
Quilt size
Width
in
Length
in
Extra on each side
in
The same as your backing: 4 in (10 cm) for a longarm
Batting to buy
Twin

size

A twin package (72 × 90 in) covers 58 × 73 in.
Or off a 90 in roll: 2⅛ yd.

How this is worked out

Batting is cut bigger than the quilt top, like the backing: 4 in on every side.
Packaged batting comes in craft, crib, twin, full, queen and king sizes; the calculator picks the smallest one that covers your quilt (turned, if that fits better). Check the label — brands differ by a few inches.
Off the roll, batting is sold 90, 96 or 120 in wide. The calculator picks the narrowest roll that covers the short side of your quilt and tells you how long to cut it.

Questions

What size batting for a throw quilt?

A 50 × 65 in throw needs batting 58 × 73 in: a twin-size package (72 × 90 in), or 2⅛ yd off a 90 in roll.

What size batting for a queen quilt?

A 90 × 95 in queen needs 98 × 103 in of batting: a king-size package (120 × 120 in), or 2⅞ yd off a 120 in roll.

Plan the whole quilt

Plan a quilt
Size, block and layout in — every cut, the fabric to buy, backing, binding and batting out.

More calculators

Quilt size chart
Standard quilt sizes from baby to king, in inches and centimetres, and a size for your own bed.
Quilt backing calculator
How much fabric the back of your quilt needs, and how to piece it.
Quilt binding calculator
How many binding strips to cut, and how much fabric that takes.