Back2Basics - blizzlike+ WoW 2.4.3 / TBC Server

The amount of experience you will get for a solo kill on a mob whose level is equal to your level is:


XP = (Char Level * 5) + 45, where Char Level = Mob Level, for mobs in Azeroth
XP = (Char Level * 5) + 235, where Char Level = Mob Level, for mobs in Outland
XP = (Char Level * 5) + 580, where Char Level = Mob Level, for mobs in Northrend
XP = (Char Level * 5) + 1878, where Char Level = Mob Level, for mobs in Cataclysm

XP = (Base XP) * (1 + 0.05 * (Mob Level - Char Level) ), where Mob Level > Char Level


This is the amount of experience you will get for a solo kill on a
mob whose level is higher than your level. This is known to be valid for
up to Mob Level = Char Level + 4 (Orange and high-Yellow Mobs). Red
mobs cap out at the same experience as orange. Higher elite mobs may
also cap at the same amount (ie are not doubled).

For a given character level, the amount of XP given by lower-level
mobs is a linear function of the Mob Level. The amount of experience
reaches zero when the difference between the Char Level and Mob Level
reaches a certain point. This is called the Zero Difference value, and
is given by:

ZD = 5, when Char Level = 1 - 7
ZD = 6, when Char Level = 8 - 9
ZD = 7, when Char Level = 10 - 11
ZD = 8, when Char Level = 12 - 15
ZD = 9, when Char Level = 16 - 19
ZD = 11, when Char Level = 20 - 29
ZD = 12, when Char Level = 30 - 39
ZD = 13, when Char Level = 40 - 44
ZD = 14, when Char Level = 45 - 49
ZD = 15, when Char Level = 50 - 54
ZD = 16, when Char Level = 55 - 59
ZD = 17, when Char Level = 60 - 79


Using the ZD values above, the formula for Mob XP for any mob of level lower than your character is:


XP = (Base XP) * (1 - (Char Level - Mob Level)/ZD )
where Mob Level < Char Level, and Mob Level > Gray Level

Elite Mobs

Mobs that are flagged as elite will give twice the amount of experience as a normal mob for the same level.


Elite XP = 2 * XP

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Rested Bonus

The rested bonus doubles the experience given by a mob.


Rested XP = 2 * XP

"worldboss", "rareelite", "elite", "rare", and "normal". Mobs
classified as "elite" gain the 2x bonus as described. Mobs classified as
"normal" and "rare" do not. The other two classes are unknown at this
time.
(elites in instances give 2.5 * XP when solo-ed; untested for normal mobs in instances - Stilpu)
(confirmed zero XP at lv 58 in Molten Core, at lv 69 in Karazhan and
Zul'Aman. confirmed XP gain in Zul'Gurub when a lv 56 dinged 57 but
exact amount earned is unknown - Ishotala) (Some
monsters, like in the Amphitheater of Anguish, give the doubled exp PER
player. If you do those quests with less than five players, you'll get
more experience than this formula. The total amount of exp they deliver
is 10 * normal_XP. Has to be confirmed, through. pikachuyann)

The following is after very limited testing. The formulae here are best guess.

Assuming everyone in the group is the same level


XP = MXP/numberOfMembers * modifier.

Modifiers:


1 person group = 1.0
2 person group = 1.0
3 person group = 1.166
4 person group = 1.3
5 person group = 1.4


Example:


1 person = 100xp
2 people = 50xp each.
3 people = ~39xp each.
4 people = ~33xp each.
5 people = ~28xp each.

http://www.wowwiki.com/Formulas:Mob_XP