Work out paper weight (gsm) instantly with clear inputs, formula shown and shareable results.
Grammage is grams per square metre, so a sheet's weight is its area in square metres multiplied by the gsm figure. Postage brackets are decided by total weight, which is why a 120 gsm A4 letter at five grams a sheet can push a mailing into the next price band.
Sheet weight
grams = width m x height m x gsm
Total weight
kg = sheet weight x sheets / 1000
grams = width m x height m x gsm. Grammage is grams per square metre, so a sheet's weight is its area in square metres multiplied by the gsm figure.
Postage brackets are decided by total weight, which is why a 120 gsm A4 letter at five grams a sheet can push a mailing into the next price band.
Enter paper weight, sheet width, sheet height, number of sheets. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.