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Plavidian760-666-3130Print and mail production in Vista, California.

Weight Calculator

Pick a paper stock and finished piece dimensions to get the weight per piece and which USPS mail-class tiers it qualifies for. Useful for postage planning before you commit to a stock.

For multi-sheet pieces (booklets, multi-page mailers) enter the total sheet count. For a single-sheet flat piece, use 1.

Quick Reference

  • Letter weight limit: 3.5 oz. Above that, the piece must mail at flat or parcel rates.
  • Flat weight limit (Marketing Mail): 16 oz (1 lb). Above that, parcel rates apply.
  • First-Class flat limit: 13 oz.
  • Bound Printed Matter: up to 15 lb (240 oz) for book-like and catalog content.
  • GSM (grams per square meter) is the universal paper-weight measure. US "basis weight" varies by paper type - the stocks list above shows both.