Combat level

A player's, monster's, or non-player character's combat level indicates the difficulty in defeating him, her, or it in combat. Levels that are lower than yours display shades of green, levels that are slightly lower than one's display yellow-ish , levels that are equal to one's are displayed as  yellow and levels that are higher than yours display shades of orange to red.

Normally, aggressive non-player characters stop attacking the player's combat level higher than double their combat level. There are exceptions, however - for example, any monsters in the wilderness will be aggressive no matter what the player's combat level is.

Monsters with a higher combat level than a player cannot be attacked by using a left mouse click. Instead, players need to right click and select the attack monster option. So, to be able to attack a Blue Dragon with combat level 111 with a simple left click, a player needs a combat level of at least 111.

All new players start out at combat level 3, and the maximum level for RuneScape 2 is level 138 (126 on the free version), while in RuneScape Classic, it is level 123.



Calculating Combat Level

 * 1) Take your Prayer level and divide it by two and round down (for example, if your Prayer level is 43, dividing by two and rounding down gives you 21)
 * 2) Take your Summoning level and divide by two and round down (for example, if your Summoning level is 23, dividing by two and rounding down gives you 11). This only applies to Members. If you were a member and are not anymore, you will not have this skill used to figure out your levels (you will use 0 rather than your Summoning level).
 * 3) Add both these numbers to your Hitpoints and Defence levels and divide the result by 4. This is your base combat level. (for example, if your Hitpoints is 60, Defence is 70, Prayer is 43 and Summoning is 23 you should end up with 40.5)
 * 4) Add your Strength and Attack levels together and multiply by 0.325. Add this to your base combat level and you should have your melee combat level.
 * 5) If your Magic or Ranged level is exceptionally higher than your Attack and Strength, carry on - in the calculation noted below Magic is used, but if your Ranged is exceptionally higher, use that instead in all cases
 * 6) Divide your magic level by 2 and round down, and then add your magic level again to this (for example, if your magic level is 83, you should end up with 127).
 * 7) Multiply this by 0.325 and add the result to your base combat level calculated above, and you should have your magic combat level.

Wiki Combat Calculator
The Combat template contains the combat formula described above. It also contains some examples. If you want to experiment you can edit this section and use the Show preview button to activate the template.

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The combat level is given for each of the three combat types. In the table that is the right most column. See the earlier text for the background.

Comments
Combat level is the only in-game visible parameter that players have to evaluate another player. High combat levels do not always accurately describe a players' capabilities in other skills. There are players with maximum combat that have very low levels in other skills and there are pure skillers with no combat levels and very high non-combat skills. Yet, there is a reasonable chance that a high combat level also implies a decent skill level and a reasonable knowledge of the game.

A more complicated assessment is in the trustworthiness of a player in trades. Some players place higher trust in higher combat level players, as they have more to lose when they get banned after being reported for illegal trading practices.