Level

From Guild Wars Wiki

Level is a numerical indicator of how powerful a player character or non-player character (NPC) is. All role-playing (PvE) characters begin at experience level 1 and, through the acquisition of experience points, can gradually increase up to a maximum level of 20. When characters reach that point, they can still accumulate experience points through normal means but will no longer "level up" with the completion of each level cycle as they once did. Instead, those characters will gain one skill point for every level cycle they complete, which are used to learn new skills from skill trainers. PvP characters are level 20 by default. NPCs are not restricted by level caps, and can range in level anywhere from 0 to 33.

A character's health is primarily dependent on his/her experience level. Level 1 characters begin with 100 health points and will gain 20 health points for each experience level gained, up to a maximum of 480 health points. This may be further modified through runes, armor and other items.

A character's (or NPC's) damage output is directly linked to their current level.

Level	Character's Base Health	Damage Multiplier1	Total XP2	Additional XP Needed3
0	-	0.354	-	-
1	100	0.372	0	2000
2	120	0.392	2000	2600
3	140	0.413	4600	3200
4	160	0.435	7800	3800
5	180	0.459	11600	4400
6	200	0.483	16000	5000
7	220	0.509	21000	5600
8	240	0.536	26600	6200
9	260	0.564	32800	6800
10	280	0.595	39600	7400
11	300	0.626	47000	8000
12	320	0.660	55000	8600
13	340	0.695	63600	9200
14	360	0.732	72800	9800
15	380	0.771	82600	10400
16	400	0.812	93000	11000
17	420	0.856	104000	11600
18	440	0.901	115600	12200
19	460	0.949	127800	12800
204	480	1.000	140600	13400
21	-	1.053	-	14000
22	-	1.110	-	14600
23	-	1.169	-	150005
24	-	1.230	-	-
25	-	1.300	-	-
26	-	1.366	-	-
27	-	1.439	-	-
28	-	1.516	-	-
29	-	1.597	-	-
30	-	1.682	-	-
31	-	1.772	-	-
32	-	1.866	-	-
33	-	1.966	-	-

¹ Two exceptions to this are martial weapons, which also incorporate a weapon-specific multiplier, and armor-ignoring effects, which always use a multiplier of 1.

² For each new level you would need an additional (2000 + 600[X - 1]) experience points, where X is your current level.

³ At any given level, a character will have between (2000[X - 1] + 300[X - 1][X - 2]) and (2000X + 300X[X - 1] - 1) experience points

⁴ An experience level cap of 20 is imposed on player characters, but this does not apply to NPCs.

⁵ Each further cycle consists of 15000 experience points.