What are standard UK bed sizes?

Single: 90×190cm. Double: 135×190cm. King: 150×200cm. Super King: 180×200cm. Cot: 60×120cm. These are mattress top dimensions.

What is a good side drop?

Standard side drop is 30–40cm. This covers the mattress depth (typically 25cm) plus a few centimetres overhang. For a luxurious look, add more. For a coverlet style, use 15–20cm.

Should I add pillow tuck?

Add 20–30cm at the top for a pillow tuck if you want the quilt to fold over pillows. If using a separate pillow sham, you can reduce or eliminate this.

sewcalcs.uk

Quilt Size Calculator — Bed Quilt Dimensions

Calculate quilt dimensions for standard UK bed sizes with side drop, foot drop and pillow tuck allowances.

Bed Size

Side Drop

How far the quilt hangs over each side (30–40cm typical; 15–20cm for a coverlet)

Foot Drop

Overhang at the foot of the bed (30–40cm typical; less if the foot sits against a footboard)

Pillow Tuck

Extra length at the top to fold over pillows (20–30cm; set 0 if using a separate sham)

How We Calculate This

Quilt dimensions are calculated from the mattress size plus allowances.

The formula

Width = Mattress width + (Side drop × 2)

Length = Mattress length + Foot drop + Pillow tuck

Frequently Asked Questions

Related Calculators

Quilt Sandwich Calculator

Calculate batting and backing sizes needed for a quilt top including overhang allowances.

Quilt Label Calculator

Calculate label dimensions and fabric needed for quilt care labels.

Quilt Binding Calculator

Calculate binding strip fabric and length for finishing quilts.

Quilt Block Calculator

Calculate number of blocks and fabric for a quilt layout.

Strip Piecing Calculator

Calculate strip quantities for strip-pieced quilt blocks and designs.

Was this calculator helpful?

Last updated: February 2026

All calculations are estimates. Always verify quantities before cutting or purchasing fabric.