How much do paintballs weigh?

ASTM International Standard F 1979 - 04, Standard Specification for Paintballs Used in the Sport of Paintball, specifies in requirement 3.3 that paintballs shall not weigh more than 3.5 grams. There...

There is no minimum weight but they cannot weigh more than 3.5 grams.

The weight depends on the gun, you can get little cheap guns that weigh less than 5 pounds and can get as large as real firearms and weigh over 15 pounds.

5-6 lbs

You just take your weight divided by 6. example (60 pounds on earth = 10 pounds on the moon)