Experience

The RuneScape Wiki also has an article on: rsw:ExperienceThe Old School RuneScape Wiki also has an article on: osrsw:Experience

The amount of experience required to level up increases dramatically

Killing monsters and fulfilling certain tasks will grant players experience (also known as xp, exp, or experience points) which they can accumulate to increase levels in skills. To reach level 99 in a skill, players need 13,034,431 exp, and they will reach only half that amount between level 91 and 92. To reach level 99 in all 18 skills, players need to accumulate a total of 234,619,758 exp.

Hits

The Hits skill is a special case, because all accounts start with level 10 Hits and 1000 experience. This isn't enough for level 10 in other skills, however, and when RuneScape 2 was released, accounts that had not reached 1154 Hits XP had their Hitpoints level in RuneScape 2 set to the correct value for 1000 XP - which would be level 9.

Maximum experience in a single skill

Unlike in RuneScape 2, in RuneScape Classic experience does not cap at 200 million. In Classic, it is not possible to exceed 536,870,911 (${\frac {2^{31}-1}{4}}$) experience in a single skill because of data type limits.

Passing the maximum XP results in integer overflow, and the displayed value will wrap around to a very large negative number. It is possible to continue gaining experience afterwards. Going from negative to positive experience does not cause the level to reset to level 1. Only one person is currently known to have obtained "negative" experience (in the Thieving skill).

The reason for the limit being a quarter of the usual maximum for 32-bit singed integers (2,147,483,647) is precision. The number is divided by four before being displayed in order to allow for a limit set of possible experience values below 0 (0.25, 0.5, and 0.75). For example, killing a chicken gives 6.5 Hits XP, but the number beyond the decimal point is not displayed on screen.

Experience table

The following table shows the relationship between skill level, the experience required for that level, and the experience difference from the previous level:

Level	Exp	Exp Diff		Level	Exp	Exp Diff		Level	Exp	Exp Diff		Level	Exp	Exp Diff
1	0	0		26	8,740	898		51	111,945	10,612		76	1,336,443	126,022
2	83	83		27	9,730	990		52	123,660	11,715		77	1,475,581	139,138
3	174	91		28	10,824	1,094		53	136,594	12,934		78	1,629,200	153,619
4	276	102		29	12,031	1,207		54	150,872	14,278		79	1,798,808	169,608
5	388	112		30	13,363	1,332		55	166,636	15,764		80	1,986,068	187,260
6	512	124		31	14,833	1,470		56	184,040	17,404		81	2,192,818	206,750
7	650	138		32	16,456	1,623		57	203,254	19,214		82	2,421,087	228,269
8	801	151		33	18,247	1,791		58	224,466	21,212		83	2,673,114	252,027
9	969	168		34	20,224	1,977		59	247,886	23,420		84	2,951,373	278,259
10	1,154	185		35	22,406	2,182		60	273,742	25,856		85	3,258,594	307,221
11	1,358	204		36	24,815	2,409		61	302,288	28,546		86	3,597,792	339,198
12	1,584	226		37	27,473	2,658		62	333,804	31,516		87	3,972,294	374,502
13	1,833	249		38	30,408	2,935		63	368,599	34,795		88	4,385,776	413,482
14	2,107	274		39	33,648	3,240		64	407,015	38,416		89	4,842,295	456,519
15	2,411	304		40	37,224	3,576		65	449,428	42,413		90	5,346,332	504,037
16	2,746	335		41	41,171	3,947		66	496,254	46,826		91	5,902,831	556,499
17	3,115	369		42	45,529	4,358		67	547,953	51,699		92	6,517,253	614,422
18	3,523	408		43	50,339	4,810		68	605,032	57,079		93	7,195,629	678,376
19	3,973	450		44	55,649	5,310		69	668,051	63,019		94	7,944,614	748,985
20	4,470	497		45	61,512	5,863		70	737,627	69,576		95	8,771,558	826,944
21	5,018	548		46	67,983	6,471		71	814,445	76,818		96	9,684,577	913,019
22	5,624	606		47	75,127	7,144		72	899,257	84,812		97	10,692,629	1,008,052
23	6,291	667		48	83,014	7,887		73	992,895	93,638		98	11,805,606	1,112,977
24	7,028	737		49	91,721	8,707		74	1,096,278	103,383		99	13,034,431	1,228,825
25	7,842	814		50	101,333	9,612		75	1,210,421	114,143