Old School RuneScape, better known as OSRS, revolves around one number more than any other: your combat level. It decides who can attack you in the Wilderness, signals your account’s strength to other players, and shapes every specialised build from maxed mains to one-defence pures. The Osrs Combat Level Calculator on this page takes your Attack, Strength, Defence, Hitpoints, Ranged, Prayer, and Magic levels and instantly returns your exact combat level using the official game formula, so you never have to work through the maths by hand.
Combat level is a single number between 3 and 126 that summarises how dangerous your character is in a fight. It is not a simple total of your skills. Two players with similar total levels can sit many combat levels apart, because the formula weights offensive and defensive skills differently and only counts your single strongest combat style. This guide explains exactly how the calculation works, why each skill contributes the way it does, and how to use that knowledge to train smarter.
What Is Combat Level in OSRS
Combat level is a derived statistic that combines seven combat skills into one number: Attack, Strength, Defence, Hitpoints, Ranged, Prayer, and Magic. Non-combat skills such as Woodcutting, Fishing, and Agility have zero effect on it, no matter how high you train them. Every new account starts at combat level 3, with level 1 in everything except Hitpoints, which begins at 10 and can never go lower.
Your combat level is visible to every other player in the game. It appears when someone right-clicks you, it controls who can attack you in the Wilderness, and it gates entry to certain PvP brackets and minigames. Many players treat it as a badge of honour, while pure account builders manage it with extreme care to stay inside a chosen bracket. The maximum possible combat level is 126, which requires 99 in all seven combat skills.
The OSRS Combat Level Formula Explained
The combat formula has been stable since the early days of RuneScape 2 and has been verified against in-game values countless times. It has two parts: a defensive base shared by every account, and an offensive component that uses only your strongest combat style. Here it is in full:
- base = 0.25 x (Defence + Hitpoints + floor(Prayer / 2))
- melee = 0.325 x (Attack + Strength)
- range = 0.325 x floor(Ranged x 1.5)
- mage = 0.325 x floor(Magic x 1.5)
- combat level = floor(base + max(melee, range, mage))
The floor function means rounding down to the nearest whole number. Prayer is halved and rounded down before entering the base, Ranged and Magic are multiplied by 1.5 and rounded down, and the final total is rounded down as well. These roundings create quirks that experienced players exploit, such as certain Prayer levels contributing nothing at all.
The Base Component
The base, 0.25 x (Defence + Hitpoints + floor(Prayer / 2)), represents your defensive stats. Defence reduces incoming damage, Hitpoints set how much damage you can absorb, and Prayer counts at half value because prayers are temporary buffs rather than permanent stats. Every account pays this defensive cost, even pures: Hitpoints experience is earned whenever you deal damage, so every hour of combat training nudges your base upward whether you want it to or not.
Defence, by contrast, is optional. Many pure builds deliberately hold Defence at level 1 to keep combat low while offensive stats soar. Prayer is the subtlest lever: each level adds only 0.125 to the base, so it takes 8 Prayer levels to gain a full combat level from Prayer alone, and odd-numbered gains are frequently swallowed by the final rounding down.
The Three Offensive Styles
After the base, the formula evaluates your three offensive styles and keeps only the highest. Melee is 0.325 x (Attack + Strength), rewarding balanced melee training since both stats count equally. Ranged is 0.325 x floor(Ranged x 1.5) and Magic is 0.325 x floor(Magic x 1.5); the 1.5 multiplier lets a single skill compete with the Attack plus Strength pair.
This maximum-style rule is the mathematical reason pure accounts work. A player with 99 Ranged and level 1 Attack, Strength, and Defence gets the full offensive value of Ranged while paying almost no defensive cost, producing a low combat level with devastating damage. The calculator above shows this breakdown explicitly: alongside your combat level you see your dominant style and each component’s contribution, revealing exactly which stat drives your level.
Putting It All Together
Consider an account with 70 Attack, 70 Strength, 60 Defence, 65 Hitpoints, 50 Ranged, 43 Prayer, and 60 Magic. Base = 0.25 x (60 + 65 + floor(43 / 2)) = 0.25 x 146 = 36.5. Melee = 0.325 x 140 = 45.5. Range = 0.325 x floor(75) = 24.375. Mage = 0.325 x 90 = 29.25. The highest style is melee, so combat = floor(36.5 + 45.5) = 82. Enter these numbers above and the calculator returns 82, confirming the maths.
Notice how the final floor erases small gains. Training Prayer from 43 to 44 changes floor(43/2) = 21 to floor(44/2) = 22, moving combat from floor(82) to floor(82.25), which is still 82. Gains only register when they cross a whole-number boundary, which is why serious builders plan levels with a calculator instead of guessing.
How to Use This OSRS Combat Level Calculator
Enter your levels for Attack, Strength, Defence, Hitpoints, Ranged, Prayer, and Magic into the seven labelled fields. Values must be whole numbers from 1 to 99, except Hitpoints, which runs from 10 to 99, matching the game’s real limits. Click Calculate and your combat level appears instantly, with your dominant style and a full component breakdown.
The breakdown is where the insight lives. If your style shows Melee but ranged is close behind, you can see exactly how many Ranged levels would flip your account to a ranged-based combat level. If you are building a pure, test hypothetical Defence or Prayer levels before training them, since every unnecessary level raises combat without improving damage. Reset restores the minimum values for a fresh what-if scenario, and everything runs in your browser with no login and no data sent anywhere.
Why Combat Level Matters in Old School RuneScape
Combat level shapes who you can fight, where you can fight them, and how other players judge your account. A few levels can separate a fair fight from a hopeless one, which is why the number matters almost as much as the stats behind it.
Wilderness and PvP Brackets
In the Wilderness you may only attack players within a level range of your own combat level, and the range widens as you go deeper. The rule is your combat level plus or minus the Wilderness level, so at 20 Wilderness you can fight players up to 20 combat levels above or below you. PvP players obsess over sitting at the top of a bracket, where they can hit weaker opponents while staying just out of reach of stronger ones.
This bracketing is the entire reason pures exist. A ranged pure at combat 75 with 99 Ranged hits like a maxed main but can only be attacked by players near level 75, many with far lower offensive stats. The Osrs Combat Level Calculator is the standard tool pures use to confirm a planned training session will not push them into the next bracket early.
Slayer, Bossing, and PvM
Certain Slayer masters require minimum combat levels before assigning tasks, and while most bosses have no formal requirement, combat level is the community’s quick shorthand for readiness. PvM teams often advertise minimum combat levels when recruiting, using the number as a proxy for account maturity. Higher combat generally means faster kills, less damage taken, and earlier access to profitable activities.
Account Builds and Specialisation
OSRS has a rich culture of specialised builds, each defined by combat level arithmetic. Common ones include mains that train everything toward 126, ranged pures and magic pures that hold melee stats at 1, strength pures that keep Attack low for strong weapons at low combat, zerkers that cap Defence at 45, void pures that stop at 42 Defence, and classic one-defence pures. Every build is an exercise in the formula, and builders check their numbers constantly as they train.
The Maximum Combat Level: Reaching 126
Combat 126 requires 99 in all seven combat skills. The maths: base = 0.25 x (99 + 99 + 49) = 61.75; melee = 0.325 x 198 = 64.35; range and mage each = 0.325 x 148 = 48.1. Combat = floor(61.75 + 64.35) = 126. The ranged and magic terms at 99 sit far below melee, so maxed melee accounts and maxed tribrids both land on 126. It is a hard ceiling: no stat combination can produce 127.
For most players 126 represents thousands of hours, so intermediate milestones matter more: combat 100 unlocks most mid-tier content, and the 110s make high-level bossing comfortable. Punch 99 into every field above to watch the famous 126 appear with Melee as the dominant style.
Prayer and Combat Level: The Half-Weight Skill
Prayer is the most misunderstood input in the formula. Entering as floor(Prayer / 2), each level adds just 0.125 combat levels, and odd Prayer levels sometimes add nothing beyond the even level below them: Prayer 52 and 53 both contribute 26. Many pures therefore stop at even numbers like 13, 31, or 44, unlocking useful prayers such as Protect Item or Eagle Eye without wasting combat levels on odd steps that give nothing.
Prayer is the only skill in the formula with a divisor, reflecting the design view that prayers are powerful but temporary. Before training a single Prayer level, plug your stats into the calculator and check whether that level actually moves your combat number; you may find the prayer you want costs zero combat levels, or that waiting one more level changes everything.
Training Efficiently Toward Your Target Combat Level
Efficient training means feeding your dominant style, because experience in a non-dominant style raises combat through Hitpoints gains without improving the offensive term that defines your damage. Plan around the style you want to dominate, and budget the Hitpoints gains in advance with the calculator.
Training Melee
Melee uses Attack, Strength, and Defence depending on stance, and Attack plus Strength carry the generous 0.325 weight, so balanced training gives mains the most combat per hour. Sand Crabs and Ammonite Crabs serve low levels, while the Nightmare Zone and Slayer tasks take over later. Pures avoid the wrong stances religiously: accidental Defence experience can permanently break a one-defence build.
Training Ranged
Ranged is the backbone of ranged pures. Its 1.5 multiplier makes each level worth 0.4875 combat once dominant, the fastest single-skill combat gain available. Chinning, cannoning Slayer tasks, and bursting are classic methods. The key discipline is avoiding melee experience entirely, since even small Attack or Strength gains can flip the dominant-style calculation or push Hitpoints, and therefore combat, past your planned bracket.
Training Magic
Magic mirrors Ranged mathematically, with the same multiplier and per-level value once dominant. Magic pures typically train with combat spells through splashing or bursting, while mains gain Magic passively via Slayer and bossing. The classic trap is quest rewards: a single quest handing out Attack or Strength experience can ruin a carefully planned pure, so always check rewards on the wiki before completing quests on a specialised account.
Common Mistakes When Calculating Combat Level
Even veterans trip over the formula. The most frequent errors:
- Forgetting the floor operations. Rounding down at each stage means naive decimal maths can overestimate combat by a full level.
- Adding all three styles. Only the highest of melee, ranged, and magic counts; summing them is the most common hand-calculation error.
- Counting non-combat skills. Agility, Herblore, and other skilling stats never affect combat level.
- Using Hitpoints below 10. Accounts start at 10 Hitpoints and it cannot go lower.
- Ignoring the Prayer halving. Prayer 99 contributes less than Defence 50, which surprises many players.
- Assuming combat level equals strength. Gear, prayers, potions, and player skill decide real fights; combat level is a summary, not a verdict.
The calculator on this page eliminates these mistakes by implementing the exact formula with every rounding, validation, and the maximum-style rule built in.
Frequently Asked Questions
What is the OSRS combat level formula?
Base = 0.25 x (Defence + Hitpoints + floor(Prayer / 2)); melee = 0.325 x (Attack + Strength); range = 0.325 x floor(Ranged x 1.5); mage = 0.325 x floor(Magic x 1.5); combat = floor(base + max(melee, range, mage)). Only the highest offensive style counts, and every stage rounds down.
What is the maximum combat level in OSRS?
The maximum is 126, reached with 99 in Attack, Strength, Defence, Hitpoints, Ranged, Prayer, and Magic. The formula’s total available weight cannot produce 127, so 126 is a hard ceiling no stat distribution can exceed.
What is the lowest possible combat level?
The lowest is 3, where every new account begins: level 1 in Attack, Strength, Defence, Ranged, Prayer, and Magic, with level 10 Hitpoints. Combat cannot go below 3 because Hitpoints cannot drop under 10.
Does Prayer affect combat level in OSRS?
Yes, at half weight. Prayer enters as floor(Prayer / 2) inside the defensive base, adding just 0.125 combat per level, and odd-numbered Prayer levels sometimes add nothing at all because of rounding down.
Do non-combat skills affect combat level?
No. Only Attack, Strength, Defence, Hitpoints, Ranged, Prayer, and Magic matter. Skilling stats like Woodcutting, Fishing, Cooking, and Agility can reach 99 without changing combat level by a single point.
Why is Hitpoints minimum level 10 in the calculator?
Every OSRS account starts at 10 Hitpoints and it can never be lower, so the calculator enforces 10 as the minimum. Allowing less would produce combat levels that are impossible in real gameplay.
How does the calculator determine my dominant combat style?
It computes the melee, ranged, and magic terms separately and reports the highest as your dominant style, mirroring the exact game logic: 0.325 x (Attack + Strength) versus 0.325 x floor(skill x 1.5) for Ranged and Magic.
Can two players with the same total level have different combat levels?
Absolutely. Total level counts every skill equally, while combat level weights only seven combat skills and takes just the best offensive style. A skiller can share a total level with a PvM main yet sit dozens of combat levels lower.
What combat level do I need for the Wilderness?
There is no minimum to enter, but you can only fight players within a range set by your depth: at 20 Wilderness you can attack or be attacked by players up to 20 combat levels above or below you.
How many combat levels does 99 Ranged give?
Once dominant, each Ranged level is worth 0.4875 combat through the 0.325 x floor(Ranged x 1.5) term, plus Hitpoints gained while training. A fresh account taking Ranged from 1 to 99 typically lands around combat 70 to 75.
Should I train Defence on a pure account?
It depends on the build. One-defence pures hold Defence at 1, zerkers stop at 45, and void pures at 42 to unlock specific gear. Any Defence training raises the base component, so pick your target build and verify it here before training.
Does quest experience affect my combat level?
Yes, if the quest rewards experience in a combat skill. Many pures have been ruined by quest rewards granting unwanted Attack or Defence levels, so check every quest’s rewards on the wiki before completing it on a specialised account.
Why did my combat level not increase after levelling up?
The formula rounds down at several stages, so small gains are often absorbed without crossing a whole-number boundary. Training Prayer from an even to an odd level frequently changes nothing visible.
Is combat level important for bossing?
Indirectly. Bosses ignore the number, but the stats behind it set your damage and survivability. Teams recruiting for group bosses often list minimum combat levels as a quick filter for account maturity.
How accurate is this Osrs Combat Level Calculator?
It implements the exact Jagex formula, including every floor operation, the maximum-style rule, and the 1-99 and 10-99 level validations. Results match the in-game combat level for the same stats, and the breakdown lets you verify each step.