OSRS Combat Level Calculator

Accurately calculate your Old School RuneScape combat level with this simple tool.

Enter Your Stats

Your Combat Level Is

3

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Formula: The combat level is calculated by taking a base value from Defence, Hitpoints, and Prayer, then adding the highest of your Melee, Ranged, or Magic base values. The game always rounds down to the nearest whole number.

Stat Distribution

A bar chart showing your current combat stat levels.

What is the OSRS Calculator?

An OSRS calculator for combat level is an essential tool for players of Old School RuneScape. It determines your character’s overall combat strength based on a specific formula that combines several skills. This number is crucial as it dictates which players you can fight in PvP (Player vs. Player) zones like the Wilderness and which monsters you can effectively battle. Using an OSRS calculator helps players plan their account builds, whether for making a powerful “pure” for PvP or a well-rounded main account for bossing.

OSRS Calculator Formula and Explanation

The combat level calculation in Old School RuneScape is not a simple average. It’s a weighted formula designed to balance the three combat styles: Melee, Ranged, and Magic. The game first calculates your offensive potential in each style and then combines the strongest one with your defensive stats.

The core formula is:

Combat Level = 0.25 * (Defence Level + Hitpoints Level + floor(Prayer Level / 2)) + Highest Offensive Base

Where the `Highest Offensive Base` is the largest of the following three values:

• Melee Base: `0.325 * (Attack Level + Strength Level)`
• Ranged Base: `0.325 * (floor(Ranged Level * 1.5))`
• Magic Base: `0.325 * (floor(Magic Level * 1.5))`

The final result is always rounded down (floored) to the nearest integer. This is why our OSRS calculator provides the most accurate, in-game combat level. For more details on skilling, check out our OSRS Skill Calculator.

Variables Table

Description of variables used in the OSRS combat level calculation.

Variable	Meaning	Unit	Typical Range
Attack	Determines melee accuracy.	Level	1 – 99
Strength	Determines max melee hit.	Level	1 – 99
Defence	Reduces chance of being hit.	Level	1 – 99
Hitpoints	Your character’s health.	Level	10 – 99
Ranged	Determines ranged accuracy and damage.	Level	1 – 99
Magic	Determines magic accuracy.	Level	1 – 99
Prayer	Affects use of combat-boosting prayers.	Level	1 – 99

Practical Examples

Example 1: A “1 Defence Pure” Build

A common PvP build focuses on high damage with low defence to stay at a low combat level. Let’s calculate for a typical pure.

• Inputs: Attack: 60, Strength: 80, Defence: 1, Hitpoints: 75, Ranged: 1, Magic: 1, Prayer: 13
• Calculation:
  • Melee Base = 0.325 * (60 + 80) = 45.5
  • Ranged Base = 0.325 * floor(1 * 1.5) = 0.325
  • Magic Base = 0.325 * floor(1 * 1.5) = 0.325
  • Highest Base is 45.5
  • Defensive Part = 0.25 * (1 + 75 + floor(13/2)) = 0.25 * (76 + 6) = 20.5
  • Total = 20.5 + 45.5 = 66
• Result: Combat Level 66.

Planning such a build often requires looking at gear. Find the best equipment with our OSRS DPS Calculator.

Example 2: A Ranged “Tank” Build

This build combines high Defence and Ranged with lower melee stats.

• Inputs: Attack: 75, Strength: 75, Defence: 90, Hitpoints: 92, Ranged: 99, Magic: 70, Prayer: 77
• Calculation:
  • Melee Base = 0.325 * (75 + 75) = 48.75
  • Ranged Base = 0.325 * floor(99 * 1.5) = 0.325 * 148 = 48.1
  • Magic Base = 0.325 * floor(70 * 1.5) = 0.325 * 105 = 34.125
  • Highest Base is 48.75 (from Melee)
  • Defensive Part = 0.25 * (90 + 92 + floor(77/2)) = 0.25 * (182 + 38) = 55
  • Total = 55 + 48.75 = 103.75
• Result: Combat Level 103.

How to Use This OSRS Calculator

1. Enter Your Levels: Type your current or desired levels for all seven combat skills into the corresponding input fields. New accounts start at 10 Hitpoints, so that is the minimum.
2. Calculate: Click the “Calculate” button.
3. Review Results: The calculator will instantly display your precise combat level. You will also see the intermediate “base” values for Melee, Ranged, and Magic, which helps you understand which combat style is currently determining your level.
4. Analyze Chart: The bar chart provides a visual representation of your stats, making it easy to see where your strengths lie.

Key Factors That Affect OSRS Combat Level

• Attack and Strength: These two skills are the cornerstone of melee combat and are added together, giving them a heavy impact on your melee base.
• Defence and Hitpoints: These form the core of your survivability and contribute a significant, fixed portion to your combat level regardless of your offensive style.
• Ranged and Magic: These skills are calculated independently and multiplied by 1.5. This makes leveling Ranged or Magic have a faster impact on your offensive base than leveling just Attack or Strength alone.
• Prayer: Prayer has a smaller effect, as only half of your prayer level is factored in. This allows players to unlock powerful prayers with a minimal increase in combat level.
• Account Balance (Pures): For PvP “pure” accounts, keeping Defence and Prayer at specific low levels is the most critical factor to control the final combat level while maximizing damage output. See our Pure Building Guide for more info.
• Rounding Down: The game always floors (rounds down) the final calculation. This means a combat level of 89.9 is actually just 89 in-game, a fact expert players use to optimize their builds to the limit.

Frequently Asked Questions (FAQ)

1. Why is my Hitpoints level 10 by default?

All new accounts in Old School RuneScape start with 10 Hitpoints and 1 in all other combat skills. This is the base for any character.

2. Can I use this OSRS calculator for a pure account?

Yes, this calculator is perfect for planning pure accounts. You can set Defence, Prayer, or other stats to specific levels (e.g., 1, 13, 45) to see how it affects your final combat level before you commit to training.

3. Does questing affect my combat level?

Quests themselves do not directly affect your combat level. However, many quests give experience rewards in combat skills. If a quest reward levels up one of your combat stats, your combat level may increase as a result.

4. Why is my combat level different from other calculators?

Some calculators may not use the official formula, or they might round the numbers differently. Our OSRS calculator uses the exact in-game formula, including the final `floor()` function, to ensure 100% accuracy.

5. What is the maximum combat level in OSRS?

The maximum combat level is 126. This is achieved with 99 in Attack, Strength, Defence, Hitpoints, Ranged, Magic, and Prayer.

6. How can I lower my combat level?

You cannot lower your combat level in Old School RuneScape. Once you gain a level in a skill, it is permanent. This is why careful planning with an OSRS calculator is so important.

7. Which skill gives the most combat levels?

Defence and Hitpoints provide a consistent and significant increase. After that, Ranged and Magic increase your offensive base faster per level than Attack or Strength individually, because they are multiplied by 1.5. Check out our Prayer Calculator to see how that skill impacts your account.

8. Does gear affect my combat level?

No, the equipment you wear does not affect your combat level. It only affects your combat effectiveness (e.g., accuracy, max hit). Your level is determined purely by your skill stats. Plan your gear setups with our Gear Picker Tool.

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