Average item Lv Formula?

[StouterTaru]

2 handed weapons count as 2 slots and 2x the level, and level rounds down.

Im a summoner. No Shields and Im using a Crimson Circlet, soo no Cowl. Lets see 12 Slots Total.
Crimson Lv80
Darklight Tome 55 (110)
Vanya Robe 70
Darklights x 7
Austere tights 60
Demagogue Ring 60
Total 815 (870) / 12 (13) = 67.9 (66.15)
Game says item Avg Lv 66

[Hitome]

shield not counted in ilvl btw

u may have shield equipped

Wrong.

It seems that accessories have less weight than main body gear.

Wrong.

Apperantly, your body gear have a higher standing then your acessory gear.

Wrong

I'm sure different items have different weights. Switching from i70 to i90 body usually gives me 2 average ilvls. Switching rings from an i49 to i90 only gave 3 to my average though

Nope they do not.

2 handed weapons count as 2 slots and 2x the level, and level rounds down.

Im a summoner. No Shields and Im using a Crimson Circlet, soo no Cowl. Lets see 12 Slots Total.
Crimson Lv80
Darklight Tome 55 (110)
Vanya Robe 70
Darklights x 7
Austere tights 60
Demagogue Ring 60
Total 815 (870) / 12 (13) = 67.9 (66.15)
Game says item Avg Lv 66

Oh look: someone who can do basic math.

[Nekodar]

For fishers, fishing rods are calculated as one handed.. but fishers don't have any offhand tool even with total ilvl still divided by 13...
Not sure if this is just a bug on SE's side, or if fishers will get an offhand tool eventually...

With the bug being that fishing rods are counted as one handed, but are supposed to be counted as two handed...