I have added up the weight of each of the individual items in each pack and have listed them here. These weights assume a full waterskin, for the packs that contain one. You can subtract 5 lb. for an empty waterskin.
Just out of curiosity, I also added up the cost of the packs if the items were purchased separately. It turns out that most of them really are a bargain, so if you like most of the items they contain, you may as well go with a pack.
Burglar’s Pack (16 gp): Total Weight 46.5 lb (Over 21 gp. if purchased separately.)
Diplomat’s Pack (39 gp): Total Weight 46 lb (Slightly over 39 gp. if purchased separately.)
Dungeoneer’s Pack (12 gp): Total Weight 61.5 lb (Over 17 gp. if purchased separately.)
Entertainer’s Pack (40 gp): Total Weight 38 lb (Over 63 gp. if purchased separately.)
Explorer’s Pack (10 gp): Total Weight 59 lb (Same cost of 10 gp. if purchased separately.)
Priest’s Pack (19 gp): Total Weight 25 lb (Over 27 gp. if purchased separately.)
The Priest’s Pack contains items that are not listed for purchase separately. Here are the values I used.
alms box, [a well-made small wooden box about 1 gp and 1 lb.]
2 blocks of incense, [2 smaller blocks of cheap incense should cost about 1 gp, the weight is negligible]
censer, [a light weight brass censer and chain should be about the same as a holy symbol 5 gp 1 lb]
vestments, [Fine clothes cost 15 gp and weigh 6 lb. so we can use that]
Scholar’s Pack (40 gp): Total Weight 11 lb (Cost of a little over 40 gp. if purchased separately.)
This assumes a small knife cost 2 gold pieces and a little bag of sand is 1 lb.