OSRS Attack Calculator

Accurately calculate your Old School RuneScape combat level and understand the impact of your Attack, Strength, Defence, and Hitpoints stats.

OSRS Combat Level Calculator

Your OSRS Combat Level Results

Combat Level is calculated by taking the highest of your Melee Combat, Ranged Combat, Magic Combat, and Defence Combat stats. Hitpoints and Prayer provide a flat bonus to your overall combat level.

Melee Combat = 0.325 * (Defence + Hitpoints) + 0.325 * Attack + 0.325 * Strength

Ranged Combat = 0.325 * (Defence + Hitpoints) + 0.325 * Ranged + 0.325 * Ranged

Magic Combat = 0.325 * (Defence + Hitpoints) + 0.325 * Magic + 0.325 * Magic

Defence Combat = 0.325 * (Attack + Strength + Ranged + Magic) + 0.325 * Defence + 0.325 * Hitpoints

Prayer Bonus = Floor(Prayer / 8)

Final Combat Level = Max(Melee Combat, Ranged Combat, Magic Combat, Defence Combat) + Prayer Bonus

Combat Level Distribution Table

Distribution of Combat Stats and Their Contribution to Combat Level

Stat	Level	Base Contribution	Weighted Contribution
Attack	—	—	—
Strength	—	—	—
Defence	—	—	—
Ranged	—	—	—
Magic	—	—	—
Hitpoints	—	—	—
Prayer	—	—	—

Combat Level Growth Chart

How Your Combat Level Changes with Stat Increases

What is the OSRS Attack Calculator?

The OSRS Attack Calculator, more accurately referred to as the OSRS Combat Level Calculator, is an indispensable tool for any Old School RuneScape player aiming to optimize their character’s combat effectiveness. It helps players understand how their various combat stats—Attack, Strength, Defence, Hitpoints, Ranged, Magic, and Prayer—contribute to their overall combat level. This understanding is crucial for making informed decisions about training methods, gear choices, and quest priorities. The calculator leverages the game’s internal formulas to provide an accurate prediction of your combat level, allowing you to set realistic goals and track your progress effectively.

Who should use it?

• New Players: To get an initial understanding of how combat stats work and what their initial combat level means.
• Mid-Game Players: To plan their training routes, deciding whether to prioritize Attack, Strength, or Defence for the biggest combat level gains.
• End-Game Players: To fine-tune their stats for specific PvM (Player vs. Monster) or PvP (Player vs. Player) encounters where exact combat level matters for matchmaking or gear requirements.
• Questing Players: To ensure they meet the combat level requirements for certain quests or boss fights.

Common Misconceptions:

• Misconception: Combat level is simply the average of all combat stats.
  Reality: Combat level is determined by a weighted formula, prioritizing certain stats and taking the maximum of specific combat styles. It’s not a simple average.
• Misconception: Prayer level has a direct, linear impact.
  Reality: Prayer provides a bonus based on its level divided by 8, meaning its impact diminishes significantly at higher levels compared to core combat stats.
• Misconception: Attack, Strength, and Defence are the only important stats.
  Reality: Ranged, Magic, and Hitpoints are equally, if not more, important depending on your chosen combat style and how you train.

OSRS Combat Level Formula and Mathematical Explanation

The combat level in Old School RuneScape is not a straightforward average. Instead, it’s a complex calculation designed to reflect the player’s overall combat prowess across different styles. The core idea is to determine the effective combat level for each primary combat style (Melee, Ranged, Magic) and Defence, then add a bonus from Prayer. The highest of these calculated style levels becomes the base combat level, with the Prayer bonus then applied.

Here’s a breakdown of the formulas used:

Melee Combat Level

This represents your combat effectiveness when using melee attacks. It is influenced by your Attack, Strength, Defence, and Hitpoints.

Melee Combat = 0.325 * (Defence + Hitpoints) + 0.325 * Attack + 0.325 * Strength

Ranged Combat Level

This calculates your combat effectiveness when using ranged attacks. It relies on Ranged, Defence, and Hitpoints.

Ranged Combat = 0.325 * (Defence + Hitpoints) + 0.325 * Ranged + 0.325 * Ranged

(Note: Ranged skill is weighted twice in its own calculation).

Magic Combat Level

This determines your combat effectiveness with magic spells. It is calculated using Magic, Defence, and Hitpoints.

Magic Combat = 0.325 * (Defence + Hitpoints) + 0.325 * Magic + 0.325 * Magic

(Note: Magic skill is weighted twice in its own calculation).

Defence Combat Level

This represents your defensive capabilities and is influenced by all offensive stats plus Defence and Hitpoints.

Defence Combat = 0.325 * (Attack + Strength + Ranged + Magic) + 0.325 * Defence + 0.325 * Hitpoints

Prayer Bonus

Prayer provides a flat bonus to your combat level. This bonus is calculated by dividing your Prayer level by 8 and taking the floor (rounding down to the nearest whole number).

Prayer Bonus = floor(Prayer / 8)

Final Combat Level

Your final combat level is the highest value among your Melee, Ranged, Magic, and Defence combat levels, plus the calculated Prayer Bonus.

Final Combat Level = Max(Melee Combat, Ranged Combat, Magic Combat, Defence Combat) + Prayer Bonus

Variable Explanations Table

Variable	Meaning	Unit	Typical Range
Attack	Melee accuracy and effectiveness.	Level	1 – 99
Strength	Melee damage output.	Level	1 – 99
Defence	Damage reduction and accuracy for defensive styles.	Level	1 – 99
Ranged	Ranged accuracy and damage output.	Level	1 – 99
Magic	Magic accuracy and damage output.	Level	1 – 99
Hitpoints	Hitpoints (HP) and contributes to combat level.	Level	10 – 99
Prayer	Enables prayer buffs, contributes bonus to combat level.	Level	1 – 99

Practical Examples (Real-World Use Cases)

Example 1: The Pure Melee Player

A player wants to focus purely on melee combat for training Strength and Attack efficiently, while keeping Defence low to maximize combat level gains per experience point.

• Attack: 70
• Strength: 75
• Defence: 1
• Ranged: 1
• Magic: 1
• Hitpoints: 70
• Prayer: 45

Calculations:

• Melee Combat = 0.325 * (1 + 70) + 0.325 * 70 + 0.325 * 75 = 0.325 * 71 + 22.75 + 24.375 = 23.075 + 22.75 + 24.375 = 70.2
• Ranged Combat = 0.325 * (1 + 70) + 0.325 * 1 + 0.325 * 1 = 0.325 * 71 + 0.325 + 0.325 = 23.075 + 0.65 = 23.725
• Magic Combat = 0.325 * (1 + 70) + 0.325 * 1 + 0.325 * 1 = 23.725
• Defence Combat = 0.325 * (70 + 1 + 1 + 1) + 0.325 * 1 + 0.325 * 70 = 0.325 * 73 + 0.325 + 22.75 = 23.725 + 0.325 + 22.75 = 46.8
• Prayer Bonus = floor(45 / 8) = floor(5.625) = 5
• Final Combat Level = Max(70.2, 23.725, 23.725, 46.8) + 5 = 70.2 + 5 = 75.2

Result: Combat Level 75. This player achieves a relatively high combat level for their offensive stats due to neglecting Defence, a common strategy for specific PvP builds. This shows how the calculator helps strategize build paths.

Example 2: The Balanced Skiller

A player wants to maintain a balanced approach, training all combat stats moderately while focusing on Hitpoints and Defence for survivability.

• Attack: 60
• Strength: 60
• Defence: 70
• Ranged: 65
• Magic: 65
• Hitpoints: 80
• Prayer: 60

Calculations:

• Melee Combat = 0.325 * (70 + 80) + 0.325 * 60 + 0.325 * 60 = 0.325 * 150 + 19.5 + 19.5 = 48.75 + 19.5 + 19.5 = 87.75
• Ranged Combat = 0.325 * (70 + 80) + 0.325 * 65 + 0.325 * 65 = 0.325 * 150 + 21.125 + 21.125 = 48.75 + 42.25 = 91.0
• Magic Combat = 0.325 * (70 + 80) + 0.325 * 65 + 0.325 * 65 = 91.0
• Defence Combat = 0.325 * (60 + 60 + 65 + 65) + 0.325 * 70 + 0.325 * 80 = 0.325 * 250 + 22.75 + 26.0 = 81.25 + 22.75 + 26.0 = 130.0
• Prayer Bonus = floor(60 / 8) = floor(7.5) = 7
• Final Combat Level = Max(87.75, 91.0, 91.0, 130.0) + 7 = 130.0 + 7 = 137.0

Result: Combat Level 137. This player has a high combat level due to their significantly higher Defence and Hitpoints, making them suitable for tanking and general PvM. The calculator helps visualize the impact of investing in defensive stats.

How to Use This OSRS Combat Level Calculator

Using the OSRS Combat Level Calculator is straightforward and designed for quick, accurate results. Follow these simple steps:

1. Input Your Stats: Enter your current levels for Attack, Strength, Defence, Hitpoints, Prayer, Ranged, and Magic into the respective input fields. Ensure you use your actual in-game levels (1-99).
2. Check Helper Text: Each input field has helper text providing context and the valid range for the stat.
3. Calculate: Click the “Calculate Combat Level” button. The calculator will process your inputs based on the official OSRS combat formula.
4. View Results: Your primary combat level will be displayed prominently. Below that, you’ll see the calculated values for Melee, Ranged, Magic, Defence, Hitpoints, and Prayer contributions, along with the final derived combat level. The formula used is also explained for clarity.
5. Analyze the Table: The “Combat Level Distribution Table” provides a more detailed breakdown, showing the base and weighted contribution of each stat towards your combat level. This helps pinpoint which stats are driving your level the most.
6. Visualize with the Chart: The “Combat Level Growth Chart” visually represents how your combat level might change as you train specific stats. It’s useful for comparing the efficiency of different training paths.
7. Copy Results: If you need to share your results or save them, click the “Copy Results” button. This will copy the main result, intermediate values, and key assumptions to your clipboard.
8. Reset: If you want to start over or input new stats, click the “Reset” button. This will restore the input fields to sensible default values (typically level 1 for most stats, with minimum HP).

How to Read Results:

• Primary Result: This is your total combat level.
• Combat Style Contributions: These show the effective combat level calculated for each primary combat style (Melee, Ranged, Magic) and Defence. Your overall combat level (before Prayer bonus) will be the highest of these.
• Prayer Bonus: The flat bonus added to your highest combat style level.
• Table Breakdown: Helps understand the granular impact of each stat. Look for stats with higher “Weighted Contribution” for significant impact.
• Chart: Use this to compare the impact of gaining one level in Attack vs. Strength vs. Defence, etc., on your overall combat level.

Decision-Making Guidance:

• High Attack/Strength, Low Defence: Ideal for “Zerker” or “Pure” accounts focused on maximum offensive combat level for PvP or specific PvM niches.
• High Ranged/Magic, Moderate Defence: Suitable for account builds prioritizing ranged or magic combat, often used for PvM.
• High Defence/Hitpoints, Balanced Offense: Classic “Tank” builds effective for survivability in group content or certain boss fights.
• High Prayer: While giving a small bonus, high Prayer levels are more valued for their utility (prayer point conservation) than the direct combat level boost.

Key Factors That Affect OSRS Combat Level Results

Several factors influence your calculated combat level in OSRS. Understanding these allows for more strategic training and better use of the calculator:

1. Core Combat Stats (Attack, Strength, Defence, Ranged, Magic): These are the primary drivers of your combat level. Increasing any of these stats will directly raise your combat level, but the rate of increase depends on the specific formula and your current stat distribution. For example, increasing Ranged or Magic significantly boosts their respective combat style levels, potentially making them the highest contributing factor.
2. Hitpoints (HP): HP is crucial as it’s factored into *all* combat style calculations (Melee, Ranged, Magic, and Defence). This means training HP is one of the most efficient ways to increase your combat level across the board, making it highly valuable for all account types.
3. Prayer Level: While important for in-game buffs, its direct contribution to combat level is capped. The bonus is `floor(Prayer / 8)`, meaning you need 8 Prayer levels to gain just 1 combat level bonus. Its impact is significantly less than core combat stats, especially at higher levels.
4. Stat Distribution (The “Max” Function): The final combat level calculation relies on the *maximum* of the four calculated combat style levels (Melee, Ranged, Magic, Defence). This means focusing heavily on one style (e.g., pure Strength) will increase your combat level faster than spreading stats thinly across all of them, assuming other stats are kept equal. This is why “pure” accounts exist.
5. Formula Weighting: The constant multiplier of 0.325 means that each component stat contributes equally to its respective formula. However, the structure of the formulas means some stats are effectively “doubled” in their own style calculation (e.g., Ranged in Ranged Combat, Magic in Magic Combat). This highlights the importance of prioritizing the primary offensive stat for that style.
6. Training Efficiency vs. Combat Level Gain: This calculator shows the *result*, but not the *efficiency*. Some training methods yield experience faster but might offer less desirable stat distributions for a specific goal. Players must balance XP rates with the desired stat outcome. For instance, training Attack might be faster than Strength initially, but Strength often provides a bigger damage boost for its level.
7. Quest Rewards: Certain quests grant significant stat experience boosts. Planning quests around your training can accelerate progress towards higher combat levels.
8. Combat Style Choice: Whether you primarily use melee, ranged, or magic weapons dictates which combat style level is most relevant. The calculator helps you see the potential of each style based on your stats.

Frequently Asked Questions (FAQ)

Q1: What is the maximum possible combat level in OSRS?

A: The maximum theoretical combat level is 138. This is achieved with stats like 99 Attack, 99 Strength, 99 Defence, 99 Ranged, 99 Magic, 99 Hitpoints, and 99 Prayer.

Q2: Why does my combat level not match the calculator?

A: Ensure you have entered all relevant stats correctly, especially the optional ones like Ranged, Magic, and Prayer, as they all contribute. Double-check for typos. The formula implemented here is the standard one used by the game.

Q3: How does training Hitpoints affect my combat level?

A: Hitpoints are very important! They are included in the calculation for Melee, Ranged, Magic, and Defence combat levels, meaning training HP increases your combat level regardless of your primary offensive style. It’s a universal combat level booster.

Q4: Should I train Attack, Strength, or Defence first?

A: This depends on your goals. For faster combat level gains and maximum offensive power (PvP/high-level PvM), prioritizing Attack and Strength while keeping Defence low (“pure” builds) is common. For survivability and general PvM, a balanced approach with higher Defence and HP is better. The calculator helps visualize these trade-offs.

Q5: Does the Prayer level bonus cap?

A: Yes, the bonus is calculated as `floor(Prayer Level / 8)`. At level 99 Prayer, this yields a bonus of `floor(99 / 8) = 12`. While useful, it’s a smaller bonus compared to the impact of core combat stats.

Q6: Are there different combat formulas for different versions of OSRS?

A: The formula used here is the standard for Old School RuneScape. While some minor tweaks might have occurred historically or in RuneScape 3, this is the accepted formula for OSRS.

Q7: How can I use the chart effectively?

A: The chart shows hypothetical scenarios. You can input your current stats, then simulate gaining one level in a specific stat (e.g., Attack +1) to see how much your combat level increases. This helps compare the ‘value’ of gaining a level in different stats.

Q8: What if I only want to train Ranged or Magic?

A: The calculator handles this perfectly. Simply input your Ranged or Magic level and keep Attack/Strength low. The calculator will determine your Ranged or Magic combat level, and your overall combat level will be the max of that, Defence, and the Prayer bonus.

Related Tools and Internal Resources

• OSRS Combat Level Calculator Use this tool to find your exact combat level based on stats.
• OSRS Quest Guide Plan your quest progression and see stat requirements.
• OSRS XP Calculator Estimate the time needed to reach your desired skill levels.
• OSRS Gear Optimizer Find the best equipment for your combat stats and style.
• OSRS Boss Guides Learn strategies for defeating various bosses, often tied to combat level.
• OSRS Training Methods Guide Discover efficient ways to train your combat stats.