Optimize your combat efficiency in Old School RuneScape (OSRS) with a transparent, data-driven DPS Calculator built to estimate damage per second, hit chance, accuracy, max hit, and real combat performance.
This tool is designed to help players compare weapons, evaluate gear setups, analyze accuracy trade-offs, and understand OSRS combat mechanics using formulas based on publicly documented game systems and verified community research.
Unlike simplified calculators, this platform emphasizes methodological clarity, realistic assumptions, and conservative estimates, helping users make informed decisions without exaggerated or misleading claims.
OSRS DPS Calculator
What This OSRS DPS Calculator Does
This calculator estimates expected average DPS by combining:
- Player combat stats
- Strength and accuracy bonuses
- Attack speed (tick-based timing)
- Weapon max hit potential
- Enemy defence and mitigation
- Hit chance probability
- Combat modifiers (prayers, gear effects, special attacks)
It provides a modeled estimate of long-term combat performance, meaning it predicts average expected damage over time, not guaranteed short-term outcomes.
Who This Calculator Is For
This tool is useful for:
PvM Players
Optimize DPS against bosses, Slayer targets, and high-defence monsters.
PvP Players
Evaluate hit consistency, KO potential, and accuracy trade-offs.
Gear Optimizers
Compare budget vs max gear, weapon upgrades, and strength scaling.
Theorycrafters
Analyze combat formulas, tick speed impact, and probability behavior.
Efficiency-Focused Players
Improve combat performance by understanding damage mechanics rather than guessing.
How OSRS DPS Is Calculated
OSRS DPS is influenced by three major factors:
1. Max Hit
Determined by:
- Strength level
- Strength bonus
- Gear modifiers
- Prayers and potions
2. Accuracy / Hit Chance
Calculated using:
- Attack roll vs enemy defence roll
- Equipment accuracy bonuses
- Style modifiers
3. Attack Speed
Measured in game ticks (0.6 seconds per tick)
DPS Formula (Simplified):
DPS = (Max Hit × Hit Chance) ÷ Attack Interval
For deeper technical detail, see our Methodology page.
Accuracy, Methodology & Limitations
This calculator provides estimates, not guarantees.
Key limitations to understand:
- OSRS combat uses random number generation (RNG)
- Real combat results vary hit-to-hit
- Some mechanics include hidden or situational modifiers
- Game updates may alter formulas
We document calculation assumptions on our Sources & Accuracy page.
Compare Weapons, Gear & Combat Setups
Use this calculator to compare:
- Weapons vs weapons
- Strength vs accuracy trade-offs
- Attack speed differences
- Special attack value
- Slayer vs non-Slayer setups
Supporting tools:
- OSRS Strength Bonus Calculator
- OSRS Weapon Damage Calculator
- OSRS Hit Chance Calculator
- OSRS Attack Speed Calculator
Why This Calculator Is Reliable
We aim for accuracy without exaggeration by:
- Using documented OSRS combat formulas
- Aligning with community-verified research
- Applying probability-based expected value modeling
- Avoiding unrealistic best-case assumptions
- Updating calculations when mechanics change
We do not claim official affiliation with Jagex. This tool is intended as a neutral, educational reference, not an official game source.
Learn more about our standards on the About Us page.
Real Use Cases
Boss DPS Optimization
Estimate damage output before choosing gear for bosses like Zulrah, Vorkath, or Slayer targets.
Slayer Task Efficiency
Compare setups to maximize XP and task speed.
PvP Hit Consistency
Analyze whether higher accuracy or higher max hit provides better KO reliability.
Budget vs Max Gear Planning
Determine whether an expensive upgrade meaningfully improves DPS.
Common DPS Calculation Mistakes Players Make
Overvaluing Max Hit
A higher max hit means little if accuracy is low.
Ignoring Attack Speed
Faster weapons often outperform slower high-damage weapons.
Misjudging Accuracy Breakpoints
Small accuracy gains can significantly increase DPS in high-defence fights.
Testing Short-Term RNG
Short test sessions do not reflect long-term average DPS.
Additional Combat Tools
Explore other OSRS combat calculators:
- OSRS Melee DPS Calculator
- OSRS Magic DPS Calculator
- OSRS Ranged DPS Calculator
- OSRS Defence & Damage Mitigation Calculator
- OSRS Combat Level Calculator
Responsible Use & Disclaimer Summary
- Results are estimates, not guarantees
- Actual gameplay outcomes may vary
- This site is not affiliated with Jagex
- Calculations should be used as decision-support tools
Frequently Asked Questions
Is this the most accurate OSRS DPS calculator?
We aim for transparent and conservative estimates, but no third-party tool can guarantee perfect replication of in-game results.
Does accuracy matter more than max hit?
In high-defence scenarios, accuracy often has a greater impact on real DPS.
How often is this calculator updated?
Formulas are updated when significant OSRS combat mechanics change.
Can this predict exact in-game DPS?
No — it predicts average expected DPS, not guaranteed outcomes.
Final Note on Accuracy & Transparency
This homepage and calculator are designed to serve as a long-term educational reference, prioritizing accuracy, neutrality, and clarity over hype or unrealistic promises.
We welcome feedback and corrections through our Contact page.