Jeans Size Calculator

in
Measure at your natural waist (belly button level).
in
Measure from crotch to ankle bone.
Everyday Life

Find your jeans size from waist and inseam measurements for men's and women's denim.

Formula

Jeans size = Waist (in) × Inseam (in), both rounded to nearest whole number
  • Most jeans are labeled W(waist) × L(inseam) in inches.
  • Natural waist = belly button level. Jeans waist is often worn lower.
  • Denim stretches slightly — many people size down 1 inch in waist.

32-inch waist, 30-inch inseam

Inputs
  • Waist Circumference: 32 in
  • Inseam Length: 30 in

Jeans size = 32×30 (labeled W32 L30).

Frequently asked questions

How do I measure waist for jeans?
Measure at the belly button (natural waist). If you wear jeans low on the hips, measure there instead.
How do I measure inseam?
Stand with feet together. Measure from crotch seam to bottom of ankle bone (or preferred hem length).
Do jeans shrink after washing?
100% cotton denim shrinks 1-3%. Pre-washed denim is more stable. Size up 1 if unsure.
What is standard inseam for men?
30 in (short), 32 in (regular), 34 in (long), 36 in (extra long).