Paper Thickness Calculator

Your details

Choose how you want to calculate: measure a stack, find a stack height, or estimate from paper weight.
Measure the total height of your stack of paper with a ruler or calipers.
mm
Count the sheets in your stack. More sheets = more accurate result.
sheets
Sheet thicknessStandard office paper
0.1mm

Thickness of a single sheet in millimetres

Thickness (inches)0.00394in
Thickness (microns)100um
Caliper (points)3.94pt
Stack height10mm
Stack height (inches)0.394in
Pages per inch254PPI
0.1 mm
Tissue<0.06Lightweight0.06-0.1Standard office0.1-0.13Heavyweight text0.13-0.2Light cardstock0.2-0.35Heavy cardstock0.35-0.55Paperboard0.55+

Sheet thickness: 0.1000 mm (3.94 pt caliper)

  • A caliper of 3.94 pt means the sheet is 3.94 thousandths of an inch thick - the unit print buyers and binderies use when specifying paper.
  • At 254 pages per inch (PPI), a 500-sheet ream would create a book spine roughly 50 mm thick.
  • The full stack measures 10.00 mm (0.394 in).

Next stepBook binders use PPI to calculate spine width: divide total page count by 254 PPI to get spine width in inches, then convert to mm as needed.

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