RS Combat Calculator (OSRS & RS3)

Combat Level Breakdown

This table shows how each skill group contributes to your final combat level.

Component	Contributing Skills	Value
Base Level	Defence, Hitpoints, Prayer	2.75
Melee Modifier	Attack, Strength	0.65
Ranged Modifier	Ranged	0.48
Magic Modifier	Magic	0.48
Highest Modifier	Melee	0.65

What is an RS Combat Calculator?

An RS combat calculator is a specialized tool used by players of the massively multiplayer online role-playing game RuneScape (both Old School RuneScape and RS3) to determine their character’s combat level. This level is a key indicator of a character’s overall strength in combat. Unlike a simple level-up system, RuneScape’s combat level is derived from a specific formula that combines multiple skills. This calculator allows players to input their current or desired levels in Attack, Strength, Defence, Hitpoints, Ranged, Magic, and Prayer to see the resulting combat level. It’s an essential utility for planning character builds, especially for Player vs. Player (PvP) accounts that need to stay within a specific level bracket.

RS Combat Calculator Formula and Explanation

The combat level in Old School RuneScape is not a simple sum of your skills. It’s calculated using a weighted formula that emphasizes your primary attack style. The formula can be broken down into two main parts: a defensive base and an offensive modifier.

1. Base Level Calculation: This component is the foundation of your combat level and is derived from your defensive stats.

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

2. Offensive Style Calculation: The game then calculates the potential contribution from each of the three combat styles: Melee, Ranged, and Magic.

Melee = 0.325 * (Attack Level + Strength Level)

Ranged = 0.325 * floor(Ranged Level * 1.5)

Magic = 0.325 * floor(Magic Level * 1.5)

3. Final Combat Level: Your final combat level is the sum of your Base Level and the highest of the three offensive style calculations. The result is always rounded down (floored).

Combat Level = floor(Base + max(Melee, Ranged, Magic))

Variables Table

Variables used in the RS combat calculator formula.

Variable	Meaning	Unit	Typical Range
Attack/Strength/Defence etc.	The player’s level in the respective skill.	Level	1 – 99
Base	The defensive component of the combat level.	Combat Points	~2.75 – 49.25
Melee/Ranged/Magic	The offensive component for each combat style.	Combat Points	~0.65 – 64.35

Practical Examples

Example 1: A Pure Melee Build (“1 Defence Pure”)

A common PvP build focuses on high damage with low defence. Let’s see how our RS combat calculator processes this. For more information on effective training, check out our melee training guide.

• Inputs: Attack: 60, Strength: 85, Defence: 1, Hitpoints: 80, Ranged: 1, Magic: 1, Prayer: 15
• Base Calculation: 0.25 * (1 + 80 + floor(15 / 2)) = 0.25 * (81 + 7) = 22
• Offensive Calculation:
  • Melee: 0.325 * (60 + 85) = 47.125
  • Ranged: 0.325 * floor(1 * 1.5) = 0.325
  • Magic: 0.325 * floor(1 * 1.5) = 0.325
• Final Result: floor(22 + 47.125) = 69 Combat Level

Example 2: A Balanced Main Account

A high-level player with balanced stats will have a different calculation. This is typical for players engaging in high-level PvM, who might consult quest guides for gear unlocks.

• Inputs: Attack: 90, Strength: 90, Defence: 90, Hitpoints: 99, Ranged: 90, Magic: 90, Prayer: 77
• Base Calculation: 0.25 * (90 + 99 + floor(77 / 2)) = 0.25 * (189 + 38) = 56.75
• Offensive Calculation:
  • Melee: 0.325 * (90 + 90) = 58.5
  • Ranged: 0.325 * floor(90 * 1.5) = 43.875
  • Magic: 0.325 * floor(90 * 1.5) = 43.875
• Final Result: floor(56.75 + 58.5) = 115 Combat Level

How to Use This RS Combat Calculator

Using this calculator is simple and intuitive. Follow these steps to accurately determine your combat level or plan a future build.

1. Enter Skill Levels: Input your character’s levels for the seven combat-related skills in the designated fields. The unit for each input is “Level”, ranging from 1 to 99.
2. Real-Time Calculation: The calculator updates automatically as you type. There is no “calculate” button to press.
3. Interpret the Results: The primary result is your final combat level, displayed prominently. Below it, you can see the intermediate values: your ‘Base’ level from defensive stats and the offensive value for each of the three styles. The highest of these offensive values is used in the final calculation.
4. Plan Your Build: Adjust the levels to see how gaining a level in one skill versus another will affect your final combat level. This is crucial for creating specialized accounts, like a Prayer-focused build.
5. Reset and Copy: Use the ‘Reset’ button to return all values to their defaults. Use the ‘Copy Results’ button to quickly save and share a summary of your stats and combat level.

Key Factors That Affect RuneScape Combat Level

Several skills contribute to your combat level, but their impact varies significantly. Understanding these factors is vital for efficient character progression. You might find our skill calculators useful for planning your training.

1. Defence and Hitpoints: These two skills form the bulk of your ‘Base’ level. Every level in either provides a 0.25 point increase to your combat level calculation.
2. Prayer: Prayer has a smaller, but still important, impact. Every two Prayer levels provide a 0.25 point increase to your ‘Base’ level (due to being halved in the formula).
3. Primary Offensive Skills (Attack/Strength or Ranged or Magic): Your highest combat style has the most significant impact. For melee, Attack and Strength are combined, making them very efficient for raising your combat level.
4. Combined Impact of Attack and Strength: Each level in Attack or Strength contributes 0.325 points to your melee offensive value. This means melee-based accounts will often have the highest offensive modifier.
5. Ranged and Magic Scaling: These skills are multiplied by 1.5 in their respective formulas, meaning each level contributes approximately 0.4875 points (0.325 * 1.5) to their offensive value. This is a higher individual contribution than Attack or Strength, but they are not combined.
6. The “Highest Style” Rule: Crucially, only your highest offensive style contributes to your final level. If your melee value is 45.0 and your ranged is 44.0, your ranged level provides *zero* direct contribution to your final combat level. This is fundamental to making “pure” accounts.

Frequently Asked Questions (FAQ)

1. Which skills does the RS combat calculator use?

The calculator uses the seven skills that directly influence the combat level formula: Attack, Strength, Defence, Hitpoints, Ranged, Magic, and Prayer. Non-combat skills like Fishing or Woodcutting have no effect.

2. Is this calculator for OSRS or RS3?

This calculator uses the formula for Old School RuneScape (OSRS), which is also used for RS3 players in Legacy combat mode. The standard RS3 combat formula (EoC) is different and results in a higher level cap (138+).

3. Why is my combat level not changing when I level up Ranged?

This happens when your Melee or Magic offensive value is higher than your Ranged value. Since only the highest style is used, increasing a lower offensive skill won’t affect your combat level until it surpasses the current highest one.

4. What is the maximum combat level in OSRS?

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

5. How can I keep my combat level low?

To maintain a low combat level, you should strategically train your stats. Typically, this involves leaving Defence at a low level (or level 1) and avoiding training Prayer. Focusing on one combat style (e.g., Strength and Ranged) is also key. Using our RS combat calculator is the best way to plan this.

6. Why is Prayer divided by two in the formula?

The formula is designed to give defensive stats (Defence, HP) and offensive stats more weight than support stats like Prayer. By halving the prayer level’s contribution, the game ensures that a high prayer level alone doesn’t dramatically inflate a player’s combat level. For tips on cost-effective training, see a prayer training guide.

7. Does Hitpoints level matter from the start?

Yes. Unlike some early misconceptions, Hitpoints has always been a factor. It starts at level 10 and provides a 0.25 combat point contribution per level, just like Defence. Every point matters, especially for low-level builds.

8. How accurate is this RS combat calculator?

This calculator is 100% accurate as it uses the exact integer-based formula found within the game’s code, including the `floor()` functions (rounding down) at the correct steps.

Related Tools and Internal Resources

Planning your account involves more than just combat. Use these resources to optimize every aspect of your gameplay.