Question about how i-Level is Calculated

[Kyros]

From what I remember, Left side gear is weighted more heavily than Right side accessories. Or at least it feels that way. It took me like 40 iLvl worth of accessory upgrades to see the iLvl go up by 1.

[Hik0]

total weight is always 13.
if you can equip a shield with your weapon (sword, 1handed mages club/wand) its weight is 1
else its weight is 2

[Docent]

From what I remember, Left side gear is weighted more heavily than Right side accessories. Or at least it feels that way. It took me like 40 iLvl worth of accessory upgrades to see the iLvl go up by 1.

It does no such thing.

40 item levels upgrade on your right side is going to always give you +3 (with a very tiny chance of 4) extra average item level.

It is one of the reason why accessories, which are cheaper in poetics produce a bloated itemlevel (they do not provide as much stat, but provide as much iLVL). Compounded with the arrival of CarbonCoat, this is making the majority of the population reach a higher itemlevel, with lower stats than someone with as many Left-side pieces.

[StouterTaru]

From what I remember, Left side gear is weighted more heavily than Right side accessories. Or at least it feels that way. It took me like 40 iLvl worth of accessory upgrades to see the iLvl go up by 1.

There's no difference when factoring the ilvl number, but in general those slots are more potent.

Someone with 5 left side 120 and 5 right side 100 will have better stats than someone with 5 left side 100 and 5 right side 120.

Weapon is the biggest factor, body/pants are next, then head/hands/feet, then belt/accessories. You could put belt ahead of accessories because it has VIT and an additional stat, but the rest is the same.