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Formulas:XP To Level

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The XP required to advance to the next level is found by:

XP = ((8 × CL) + Diff(CL)) × MXP(CL) × RF(CL)
where CL = the current Character Level

Note that the XP is always rounded down to the nearest hundred.

The function MXP(CL) is the basic amount of XP earned for killing a mob of level equal to the character (see also: Formulas:Mob XP:Basic Formula)

MXP(CL) = 45 + (5 × CL) (mobs in Eastern Kingdoms and Kalimdor)
MXP(CL) = 235 + (5 × CL) (mobs in Outland)
MXP(CL) = 580 + (5 × CL) (mobs in Northrend)
MXP(CL) = 1878 + (5 × CL) (mobs in Cataclysm areas)

The function Diff(CL) is an extra difficulty factor that starts around level 30 and increases by level:

Diff(CL) =       0,     CL <= 28
Diff(CL) =       1,     CL  = 29
Diff(CL) =       3,     CL  = 30
Diff(CL) =       6,     CL  = 31
Diff(CL) = 5 x (CL-30), CL >= 32, <=59

The function RF(CL) is an extra difficulty reduction factor added in patch 2.3. It is:

RF(CL) =       1,               CL <= 10
RF(CL) =       (1-(CL-10)/100), 11 <= CL <= 27
RF(CL) =       .82,             28 <= CL <= 59
RF(CL) =       1                60 <= CL

XP to Level can be described as the following function of the character level represented by x (if and only if the character is level 32-59):

XP to Level = (65x2 - 165x - 6750) × .82

XP to Level for levels 11-27 can be found by:

XP to Level = -.4x3 + 40.4x2 + 396x

For all levels lower then 11 the XP to Level can be expressed as the second grade function:

XP to Level = 40x2 + 360x 

The XP to Level for 61-69 is:

XP to Level = 155 + MXP(CL) x (1344 - ((69-CL)*(3+(69-CL)*4)))

For 60:

XP to Level = 155 + MXP(CL) x (1344 - 69 - ((69-CL)*(3+(69-CL)*4)))

Experience to level by level (as of level 90 cap)

Icon-search-22x22 This section needs to be cleaned up to a higher standard of quality. Reason: Percentage changes need to be applied to XP values.

This table shows the character's current level and the amount of XP required to advance to the next level (e.g. "22: 24000" means that if you are level 22, you need a total of 24,000 XP to advance to level 23). This is a compilation of the tables below with all current values. This also shows the difference (percent change) in current XP requirements as compared to before Wrath of the Lich King. Note that this percentage, when added to one, is the same as RF(CL) (discrepancies are caused by rounding).

Lvl Max XP Lvl Max XP Lvl Max XP Lvl Max XP Lvl Max XP Lvl Max XP Lvl Max XP Lvl Max XP Lvl Max XP
1 400 11 8700 (-20%)[1] 21 22400 (-20%)[1] 31 41600 (-20%)[1] 41 78500 51 126100 61 317000 (-45%) 71 1539000 81 2121500
2 900 12 9800 (-20%)[1] 22 24000 (-20%)[1] 32 44600 (-20%)[1] 42 82800 52 131500 62 349000 (-43%) 72 1555700 82 2669000[1]
3 1400 13 11000 (-20%)[1] 23 25500 (-20%)[1] 33 48000 (-20%)[1] 43 87100 53 137000 63 386000 (-41%) 73 1571800 83 3469000[1]
4 2100 14 12300 (-20%)[1] 24 27200 (-20%)[1] 34 51400 (-20%)[1] 44 91600 54 142500 64 428000 (-37%) 74 1587900 84 4,583,000[1]
5 2800 15 13600 (-20%)[1] 25 28900 (-20%)[1] 35 55000 (-20%)[1] 45 96300 55 148200 65 475000 (-33%) 75 1604200 85 13000000[2]
6 3600 16 15000 (-20%)[1] 26 30500 (-20%)[1] 36 58700 (-20%)[1] 46 101000 56 154000 66 527000 (-28%) 76 1620700 86 18000000[1]
7 4500 17 16400 (-20%)[1] 27 32200 (-20%)[1] 37 62400 (-20%)[1] 47 105800 57 159900 67 585000 (-22%) 77 1637400 87 22600000[1]
8 5400 18 17800 (-20%)[1] 28 33900 (-20%)[1] 38 66200 (-20%)[1] 48 110700 58 165800 68 648000 (-15%) 78 1653900 88 27300000[1]
9 6500 19 19300 (-20%)[1] 29 36300 (-20%)[1] 39 70200 (-20%)[1] 49 115700 59 172000 69 717000 (-8%) 79 1670800 89 32800000[1]
10 7600 20 20800 30 38800 40 74300 50 120900 60 290000 (-41%) 70 1523800 80 1686300 90

Experience to Level by Level (Pre-Wrath-Logo-Small Wrath)

This table shows the character's current level and the amount of XP required to advance to the next level (e.g. "22: 24000" means that if you are level 22, you need a total of 24,000 XP to advance to level 23). This also shows the difference (percent change) in current XP requirements as compared to before Patch 2.3.0. Note that this percentage, when added to one, is the same as RF(CL) (discrepancies are caused by rounding).

XPtoLevel23

Selected data from above in graph form.

Lvl Max XP Lvl Max XP Lvl Max XP Lvl Max XP Lvl Max XP Lvl Max XP Lvl Max XP
1 400 (NC) 11 8700 (-1.1%) 21 22400 (-11.1%) 31 41600 (-18.1%) 41 78500 (-18.1%) 51 126100 (-18.1%) 61 574700 (NC)
2 900 (NC) 12 9800 (-3.0%) 22 24000 (-12.1%) 32 44600 (-18.2%) 42 82800 (-18.0%) 52 131500 (-18.0%) 62 614400 (NC)
3 1400 (NC) 13 11000 (-3.5%) 23 25500 (-13.3%) 33 48000 (-18.1%) 43 87100 (-18.1%) 53 137000 (-18.0%) 63 650300 (NC)
4 2100 (NC) 14 12300 (-4.7%) 24 27200 (-14.2%) 34 51400 (-18.2%) 44 91600 (-18.1%) 54 142500 (-18.1%) 64 682300 (NC)
5 2800 (NC) 15 13600 (-5.6%) 25 28900 (-15.0%) 35 55000 (-18.0%) 45 96300 (-18.8%) 55 148200 (-18.0%) 65 710200 (NC)
6 3600 (NC) 16 15000 (-6.3%) 26 30500 (-16.2%) 36 58700 (-18.0%) 46 101000 (-18.0%) 56 154000 (-18.0%) 66 734100 (NC)
7 4500 (NC) 17 16400 (-7.3%) 27 32200 (-17.2%) 37 62400 (-18.0%) 47 105800 (-18.0%) 57 159900 (-18.0%) 67 753700 (NC)
8 5400 (NC) 18 17800 (-8.2%) 28 33900 (-18.1%) 38 66200 (-18.1%) 48 110700 (-18.1%) 58 165800 (-18.0%) 68 768900 (NC)
9 6500 (NC) 19 19300 (-9.4%) 29 36300 (-18.1%) 39 70200 (-18.1%) 49 115700 (-18.1%) 59 172000 (-18.1%) 69 779700 (NC)
10 7600 (NC) 20 20800 (-10.3%) 30 38800 (-18.1%) 40 74300 (-18.1%) 50 120900 (-18.2%) 60 494000 (NC) 70

The total experience needed to reach level 60 is 3,379,400. This is a decrease of 705,300 experience from pre-2.3.0.
The total experience needed to reach level 70 after level 60 is 6,268,300.
The total experience needed to reach maximum level (70) is 10,141,700 (3,379,400+494,000+6,268,300) .

Pre-2.3 Table

Bc icon This section concerns content exclusive to The Burning Crusade.

This table shows the experience needed to advance, by level, before Patch 2.3.0. The table shows the character's current level and the amount of XP required to advance to the next level (e.g. "22: 27300" means that if you are level 22, you need a total of 27,300 XP to advance to level 23).

XPtoLevel

Selected data from above in graph form. Regression fits are shown. Note general agreement with the equations given above.

Lvl Max XP Lvl Max XP Lvl Max XP Lvl Max XP Lvl Max XP Lvl Max XP Lvl Max XP
1 400 11 8800 21 25200 31 50800 41 95800 51 153900 61 574700
2 900 12 10100 22 27300 32 54500 42 101000 52 160400 62 614400
3 1400 13 11400 23 29400 33 58600 43 106300 53 167100 63 650300
4 2100 14 12900 24 31700 34 62800 44 111800 54 173900 64 682300
5 2800 15 14400 25 34000 35 67100 45 117500 55 180800 65 710200
6 3600 16 16000 26 36400 36 71600 46 123200 56 187900 66 734100
7 4500 17 17700 27 38900 37 76100 47 129100 57 195000 67 753700
8 5400 18 19400 28 41400 38 80800 48 135100 58 202300 68 768900
9 6500 19 21300 29 44300 39 85700 49 141200 59 209800 69 779700
10 7600 20 23200 30 47400 40 90700 50 147500 60 494000 70

The total experience needed to reach level 60 was 4,084,700. The total for 60 to 70 was 6,762,300, making 1 to 70 10,847,000 points in total.

The total number of same-level mobs that must be killed to reach level 60 with no rest or quests was 16,971 which would take approximately 76 hours at 16 seconds per kill.

An amusing but probably not very significant figure is that the half-way point to 60 for raw experience point accumulation is 12,550 XP into level 48. Halfway to 70 for raw experience point accumulation is 344,500 XP into level 62. In actual practice, quests contribute significantly to XP so the half-way point is somewhere below this.

Rest XP

The maximum amount of "rest" that one can accumulate on a character is 150% of XP for the current level, (or 30 "bubbles") half of which is "earned" XP and half of which is "bonus" XP. This is because, every time you kill a mob, both the earned XP and the bonus XP is deducted from your rest. So, for example, if you are lvl 10 and 80% through the level (or 6080/7600) the maximum rest would be 11400. If you grind mobs until your rest is gone (and complete no quests1), it will take you to level 12 at 1180/9800, or 12% through level 12, having earned 5700 XP from killing mobs and gotten 5700 XP "free" for being rested.

1Quest (and discovery) XP does not count against your rest. Watch your rest marker when turning in a quest, and you will see it jump by the same amount as did your current XP.

In Wrath of the Lich King

Wrath-Logo-Small This section concerns content exclusive to Wrath of the Lich King.

In Wrath-Logo-Small, the XP needed to level (from 70 to 80) jumps again, but the amount of experience it takes to get to level 70 is reduced. The halfway point for 70-80 is 204100 XP into 75.

The below 60-69 XP Values are for Beta Build 9014 with the changes to 60-70 leveling for the expansion. The 70-79 XP Values are for Beta Build 8926.

Xp to level original and new

Selected data from above in graph form.

Lvl Max XP (%Change) Lvl Max XP
60 290,000 (-41.3%) 70 1,523,800
61 317,000 (-44.8%) 71 1,539,600
62 349,000 (-43.2%) 72 1,555,700
63 386,000 (-40.6%) 73 1,571,800
64 428,000 (-37.3%) 74 1,587,900
65 475,000 (-33.1%) 75 1,604,200
66 527,000 (-28.2%) 76 1,620,700
67 585,000 (-22.4%) 77 1,637,400
68 648,000 (-15.7%) 78 1,653,900
69 717,000 (-08.0%) 79 1,670,800
Tot 4,722,000 (-30.2%) Tot 15,965,800
1-80 26,106,500


In Cataclysm

Cataclysm-Logo-Small This section concerns content exclusive to Cataclysm.

In Cataclysm-Logo-Small, the XP needed to level (from 80 to 85) jumps again.

The below 81-85 XP Values are form the beta and forum posts.

Lvl Max XP
80-81 1,686,300
81-82 2,121,500
82-83 4,004,000
83-84 5,203,400
84-85 9,165,100
Tot 22,180,300

References

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