How the Combat Level Calculator works
The combat level formula has not changed since 2004. Here it is, with the rounding the game applies.
Formula
base = 0.25 × (Defence + Hitpoints + floor(Prayer / 2))
melee = 0.325 × (Attack + Strength)
ranged = 0.325 × floor(1.5 × Ranged)
magic = 0.325 × floor(1.5 × Magic)
combat = floor(base + max(melee, ranged, magic))
melee = 0.325 × (Attack + Strength)
ranged = 0.325 × floor(1.5 × Ranged)
magic = 0.325 × floor(1.5 × Magic)
combat = floor(base + max(melee, ranged, magic))
Worked example
60 Attack, 60 Strength, 60 Defence, 60 Hitpoints, 43 Prayer, 1 Ranged, 1 Magic:
base = 0.25 × (60 + 60 + 21) = 35.25
melee = 0.325 × 120 = 39 (ranged and magic are 0.325)
combat = floor(74.25) = 74
melee = 0.325 × 120 = 39 (ranged and magic are 0.325)
combat = floor(74.25) = 74
Three more Attack or Strength levels give melee = 0.325 × 123 = 39.975, total 75.225 → 75.
Notes
- Minimum is 3 (1/1/1/10/1/1/1), maximum 126.
- Base levels only; boosts, prayers and equipment are ignored.
- The "levels to next" table raises one stat at a time with the others fixed.
Sources
- The formula is the long-standing public one; checked against the in-game combat level on 11 November 2026.
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