Weight The weight of the ball shall not be greater than 1.620 ounces avoirdupois (45.93 gm).
A golf ball can't weigh more than 45.9 grams.
According to R and A rules a golf ball may weigh no more than 1.620 oz (approximately 45.93 grams) Hope this helps :)
The maximum is 45.9 grams, so this is what they usually weigh, a Titleist Pro V 1 weighs this.
Pro V 1 and Pro V 1x- 45.9 grams