I'm going to have to respond with a range, since I have a favorite pile of knives that I cycle through.
My most commonly carried:
Schrade 5OT - 2.3 oz
Buck Ecolite 112 - 3.4 oz
Buck 500 Duke - approx 4.5 oz?
Buck 112 Ranger - 5.6 oz
I also carry (but not as frequently):
Opinel #8 (thinned handle) - approx 1.7 oz
Buck 482 - 2.6 oz
Buck 486 - 3 oz
Buck 110 Hunter - 7.5 oz
What I've found is that weight isn't the determining factor for me. Frame shape matters more, specifically wide vs thin and the degree to which the bolsters are rounded and melted. Also should emphasize that what I'm doing and what I'm wearing is a massive factor.
For backpacking and backcountry travel, I want something very light and very thin in my pocket, as the knife rides in a cargo pocket and I'm very, very active. The Bucklite Max 486 and 482 excel at this, although the Opinels (with thinned handles) do very well too.
For general EDC use, I find my Schrade 5OT is the easiest carrying by far, mostly because of it's slim frame and rounded ends. Next on the list is the Buck 500, again for the same reason, despite its much greater weight. The Opinels, despite their insanely light weight are more noticeable to me, largely because of the friction imposed by the lock ring. (this can be used to help keep them in the pocket). I also find the thin 5OT and Buck 500 to carry better than any multi-blade slip joint. The flat profile lays flat in my pocket and less noticeable than the squared-off and catchy from the blades slip joints. This actually true for all my single blade knives. Would rather have them in my pocket than any multi-blade knife.
I generally wear baggy carpenter jeans with a snug belt. I honestly don't mind weight in my pocket so long as the weight moves around well. It's not uncommon for me to carry my 110 this way but I could only do it with my 110 AFTER I rounded off the square edges of the bolsters. The same was true with my old 112. (Current models have rounded bolsters, which I think is great.) When I wear closer fitting slacks, I'll move to either my thinner 5OT or Buck 500.