Old School RuneScape

OSRS Combat Calculator | dps & max hit calc

Calculate your combat level, max hit, hit chance & DPS calc.

OSRS Combat Level Calculator

Enter your current stats to see your exact unrounded combat level, displayed level, combat style, and the closest single-stat path to the next level.

Attack

Strength

Defence

Hitpoints

Prayer

Ranged

Magic

Combat level——

Player type—Highest combat contribution

Next level—Target displayed level

Base combat—Defence, HP, and Prayer

Single-stat changes to reach the next level

Each row changes one stat while keeping the others fixed. Multiple smaller upgrades may reach the target sooner.

Stat	New level	Levels gained	Result

Complete Guide to the OSRS Combat Calculator Suite

These OSRS combat tools convert your skill levels, combat bonuses, prayers, attack speed, and target defence into practical numbers. Instead of guessing whether a level, weapon, prayer, or gear upgrade is worthwhile, you can compare its effect before spending time or gold in-game.

The suite contains three connected but different tools. Combat level describes the overall strength of your account, max hit describes the largest damage roll from one successful attack, and DPS estimates sustained damage over time after accuracy and attack speed are included.

1. OSRS Combat Level Calculator

The combat level calculator estimates your displayed OSRS combat level from Attack, Strength, Defence, Hitpoints, Prayer, Ranged, and Magic. It also identifies whether melee, ranged, magic, or a balanced profile contributes most to your combat level.

The calculation has two main parts:

Base combat: Defence, Hitpoints, and half of Prayer contribute to the defensive base.
Offensive combat: the strongest of melee, ranged, or magic contribution is added to that base.

In simplified form, the calculator uses a base value of 0.25 × (Defence + Hitpoints + floor(Prayer ÷ 2)), then adds the highest offensive contribution. The displayed combat level is the whole-number portion of the result. The “next level” table tests each stat independently, so it shows what would happen if only one skill increased while all other values stayed the same.

2. OSRS Max Hit Calculator

The max hit calculator estimates the largest damage number your setup can produce when an attack successfully lands. It is useful when comparing Strength bonus, Ranged strength, Magic damage, offensive prayers, Void-style boosts, Slayer Helmet-style bonuses, or other damage multipliers.

Select Melee, Ranged, or Magic.
Enter the relevant effective level. If you are already applying a prayer boost, use the boosted level or use the prayer multiplier field consistently—do not apply the same boost twice.
Enter the equipment bonus used by that combat style.
Enter a prayer multiplier and a gear, helmet, or special damage multiplier.
Read the estimated max hit and change one input at a time to compare setups.

Max hit is not the same as average damage. A setup that hits one point higher may still produce less damage per second if it is slower or less accurate.

3. OSRS DPS Calculator

DPS means damage per second. The DPS calculator combines an attacker’s effective level and attack bonus with the target’s Defence level and armour bonus. It then uses the selected attack speed in game ticks to estimate sustained damage.

The simplified flow is:

Calculate an attack roll from the attacker’s effective level and attack bonus.
Calculate a defence roll from the target’s Defence level and armour bonus.
Compare those rolls to estimate hit chance.
Estimate average damage as roughly half of the available max hit.
Divide expected damage by the attack interval. One OSRS game tick is treated as 0.6 seconds.

For example, a high max hit with poor accuracy may have lower DPS than a slightly weaker setup that lands attacks more consistently. Use average DPS and time to kill when comparing weapons or boss setups.

Recommended workflow for accurate comparisons

Start with your current setup and save the three main results: combat level, max hit, and DPS.
Change only one variable, such as Attack level, Strength bonus, prayer, target Defence, or weapon speed.
Compare the new DPS and time to kill against the baseline, not only the max hit.
Repeat the test for realistic target Defence values. A setup can perform very differently against a low-defence monster and a heavily armoured boss.
Use the result as a comparison estimate, then verify special weapon effects and boss mechanics before making an expensive purchase.

How to interpret the results

Exact combat level: the unrounded internal value before the displayed whole-number level.
Player type: the combat style with the highest estimated offensive contribution. “Balanced” means the leading contributions are close.
Max hit: the largest estimated damage roll before accuracy is considered.
Hit chance: the estimated chance that an attack successfully lands.
Average DPS: expected damage per second over repeated attacks.
Time to kill: target hitpoints divided by estimated DPS. Actual kill times vary because damage rolls are random.

Important limitations

This is a fast planning calculator, not a complete tick-perfect OSRS equipment simulator. Actual results can change because of weapon-specific formulas, attack styles, special attacks, spell max-hit rules, damage caps, roll mechanics, salve effects, Slayer bonuses, monster immunities, defensive prayers, NPC-specific bonuses, and the exact order in which boosts are applied. For everyday comparisons, the estimates are useful; for high-value bossing or gear decisions, confirm the final setup with a game-specific calculator.

OSRS Combat Calculator FAQ

How is Combat Level calculated in OSRS?

OSRS combines a base value from Defence, Hitpoints, and half of Prayer with the strongest of your melee, ranged, or magic combat contributions. The displayed combat level is the whole-number portion of that result. This means increasing a skill that is not currently contributing the most may have little or no immediate effect until it becomes your strongest combat style.

What stats increase combat level the fastest?

It depends on your current build and which contribution is currently highest. Attack and Strength usually raise melee contribution, while Ranged and Magic each use their own weighted contribution. Defence, Hitpoints, and Prayer raise the base combat value. The fastest option is the stat that produces the largest increase in your current combat-level formula, not always the stat with the highest visible level.

How does Max Hit differ from DPS?

Max hit is the largest damage roll from one successful attack. DPS averages damage over time and includes accuracy and attack speed. A weapon can have a lower max hit but higher DPS if it attacks faster or lands more hits. Use max hit for burst-damage comparisons and DPS for sustained combat.

Why are Prayer and Defence important?

Prayer can improve effective levels, accuracy, or damage depending on the prayer and combat style. Defence contributes to your own combat level and reduces incoming accuracy when you are the defender. In a DPS comparison, the target’s Defence and armour determine how often your attacks connect.

How do Void or Slayer Helmet boosts affect Max Hit?

Multipliers increase the relevant damage calculation after the underlying level and bonus are applied. Enter a gear or helmet multiplier in the Max Hit tab to compare a boosted setup with its baseline. Because the exact order and value of bonuses can depend on the weapon, activity, or target, treat the result as an estimate.

Should I enter boosted or unboosted levels?

Choose one method and use it consistently. For the Max Hit and DPS tabs, you can enter an effective boosted level directly, or enter the base level and apply the prayer multiplier. Do not do both, or the boost will be counted twice.

Why can my in-game max hit differ from this calculator?

The tool uses a simplified core formula. In-game max hit can be changed by weapon types, attack styles, spell rules, special attacks, damage caps, target-specific bonuses, Void or Slayer effects, Salve effects, and other equipment interactions. Use the tool for quick comparisons, then check a specialized setup calculator for an exact loadout.

Why is my DPS lower than my max hit?

Max hit is one damage number, while DPS includes misses, average damage rolls, and the time between attacks. If your target has high Defence or your weapon is slow, your average damage per second can be much lower than the maximum number shown.

What does attack speed in ticks mean?

Attack speed is the number of OSRS game ticks between attacks. One tick is 0.6 seconds, so a 4-tick weapon attacks approximately every 2.4 seconds before other timing effects are considered. Lower tick values generally mean more attack opportunities per second.

Is this calculator accurate for every boss?

No. It is designed for fast, general comparisons. Bosses may have unique Defence bonuses, damage reductions, phase mechanics, immunities, prayers, or attack-cycle rules. For a specific boss, enter its known defensive values as a baseline and verify the final setup with a boss-specific calculator.

How should I choose between two gear upgrades?

Enter your current setup first, then replace only the item or bonus being tested. Compare hit chance, average DPS, and time to kill against the baseline. Prefer the upgrade that improves the result for the target you actually fight, rather than the one with the biggest max-hit increase in isolation.