osrs combat calculator

Calculate your precise combat level for Old School RuneScape based on your current skill stats.

Skill Group	Formula Component	Current Contribution
Base (Def, HP, Pray)	0.25 * (Def + HP + floor(Pray/2))	2.75
Melee (Att, Str)	0.325 * (Att + Str)	0.65
Ranged	0.325 * floor(3/2 * Ranged)	0.325
Magic	0.325 * floor(3/2 * Magic)	0.325

What is an OSRS Combat Calculator?

An OSRS Combat Calculator is an essential tool for players of Old School RuneScape (OSRS) to determine their character's combat level. In the world of Gielinor, your combat level ranges from 3 to 126 and dictates which NPCs you can fight effectively and how you interact with other players in the Wilderness or PvP worlds.

Who should use an OSRS Combat Calculator? Whether you are a "Pure" building a specific account type, a "Skiller" trying to stay level 3, or a "Main" aiming for the maximum level of 126, this tool provides the mathematical precision needed to plan your training. A common misconception is that all skills contribute equally to your combat level; in reality, the formula favors certain skill combinations over others, leading to specialized account builds like "Ranged Tanks" or "Gmaul Pures."

OSRS Combat Calculator Formula and Mathematical Explanation

The OSRS Combat Calculator uses a specific multi-part formula. It first calculates a "Base" level and then adds the highest of three offensive contributions: Melee, Ranged, or Magic.

The Step-by-Step Derivation:

1. Base Level: (Defense + Hitpoints + floor(Prayer / 2)) * 0.25
2. Melee Contribution: (Attack + Strength) * 0.325
3. Ranged Contribution: floor(Ranged * 1.5) * 0.325
4. Magic Contribution: floor(Magic * 1.5) * 0.325
5. Final Combat Level: Base Level + Max(Melee, Ranged, Magic)

Variable	Meaning	Unit	Typical Range
Att / Str	Attack and Strength levels	Level	1 – 99
Def / HP	Defense and Hitpoints levels	Level	1 – 99 (HP starts at 10)
Pray	Prayer level	Level	1 – 99
Rng / Mag	Ranged and Magic levels	Level	1 – 99

Practical Examples (Real-World Use Cases)

Example 1: The Maxed Main

If a player has 99 in all combat stats, the OSRS Combat Calculator performs the following:
Base: (99 + 99 + floor(99/2)) * 0.25 = 61.75
Melee: (99 + 99) * 0.325 = 64.35
Total: 61.75 + 64.35 = 126.1 (Truncated to 126).

Example 2: The Level 3 Skiller

A skiller has 1 in all combat stats except Hitpoints, which is 10.
Base: (1 + 10 + floor(1/2)) * 0.25 = 2.75
Melee: (1 + 1) * 0.325 = 0.65
Total: 2.75 + 0.65 = 3.4 (Truncated to 3).

How to Use This OSRS Combat Calculator

Using our OSRS Combat Calculator is straightforward:

• Step 1: Enter your current levels for Attack, Strength, Defense, Hitpoints, Prayer, Ranged, and Magic into the input fields.
• Step 2: Observe the "Main Result" which updates instantly to show your current combat level.
• Step 3: Review the "Intermediate Values" to see which combat class (Melee, Ranged, or Magic) is currently determining your level.
• Step 4: Use the "Next Level In" section to see how many more levels you can gain in specific skills before your combat level increases.

Key Factors That Affect OSRS Combat Calculator Results

1. The 1.5x Multiplier: Ranged and Magic are weighted by 1.5x before being compared to the sum of Attack and Strength. This means a player can have higher Ranged/Magic levels than Melee levels without increasing their combat level.
2. Prayer's Odd Levels: Since the formula uses floor(Prayer / 2), only every even level of Prayer (2, 4, 6…) contributes to the base combat calculation.
3. Hitpoints and Defense: These are "heavy" stats. Every 4 levels in either Defense or Hitpoints will always result in exactly 1 combat level increase.
4. Combat Specialization: If your Ranged or Magic contribution is significantly higher than your Melee contribution, you are considered "Ranged-based" or "Magic-based."
5. Rounding Down: OSRS always truncates (rounds down) the final combat level. A 98.99 combat level is still displayed as 98 in-game.
6. The Level 126 Cap: No matter how high your virtual levels go (e.g., 120 in a skill), the OSRS Combat Calculator will never exceed 126.

Frequently Asked Questions (FAQ)

1. Does Summoning affect my combat level in OSRS?

No, Summoning is a skill from RuneScape 3. In Old School RuneScape, the max combat level is 126 and does not include Summoning.

2. Why did my combat level not go up when I leveled Prayer?

The OSRS Combat Calculator uses floor(Prayer/2). This means only even-numbered Prayer levels contribute to your combat level calculation.

3. Can I be level 3 with 99 in a non-combat skill?

Yes! Skills like Woodcutting, Cooking, or Smithing do not affect the OSRS Combat Calculator. Only the seven combat-related skills do.

4. What is a "Combat Class"?

It refers to which offensive style is currently the highest: Melee (Att+Str), Ranged, or Magic. The highest one determines your final level.

5. How many HP levels equal one combat level?

Generally, 4 Hitpoints levels will increase your combat level by 1, assuming other stats remain constant.

6. Is it possible to have 99 Magic and stay low combat?

Yes, if you keep your Defense, Hitpoints, and Melee stats at level 1, 99 Magic would result in a combat level of approximately 40.

7. Does the calculator account for temporary boosts?

No, the OSRS Combat Calculator only uses your permanent base levels. Potions or prayers like Piety do not change your combat level.

8. What is the "Base" combat level?

The base is the defensive portion of the formula (Def, HP, Prayer). It accounts for roughly 25% of your total combat level.