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Free League Of Legends DPS Calculator – Champion Damage Tool

Free League Of Legends DPS calculator to analyze champion damage output instantly. Enter stats to optimize your build and improve performance.

⚡ Free to use 📱 Mobile friendly 🕒 Updated: June 21, 2026
🧮 League Of Legends Dps Calculator
Damage Type:
Damage Per Second
0
per second
📊 Average DPS by Champion Role at Level 11 (Full Build)
📋 Table of Contents
  1. Use the League Of Legends Dps Calculator
  2. What is League Of Legends Dps Calculator?
  3. How to Use
  4. Formula Used
  5. Example Calculation
  6. Benefits
  7. Tips and Tricks
  8. Conclusion
  9. FAQ (8 Questions)

What is League Of Legends Dps Calculator?

A League Of Legends Dps Calculator is a specialized analytical tool that computes the theoretical damage output per second (DPS) of a champion based on their core stats, itemization, ability levels, and target defenses. Unlike simple damage meters found in-game, this calculator accounts for critical strike chance, attack speed breakpoints, armor penetration, and ability power ratios to provide a precise mathematical estimate of sustained combat effectiveness. For players climbing the ranked ladder or theorycrafting optimal builds, understanding raw DPS numbers is essential for making data-driven decisions about item purchases and rune setups.

High-elo players, coaches, and content creators frequently use DPS calculators to compare item spikes like Kraken Slayer versus Guinsoo's Rageblade on on-hit champions, or to evaluate the marginal benefit of buying a Void Staff versus a Rabadon's Deathcap on mages. The tool eliminates guesswork by translating complex game mechanics—such as the difference between flat armor penetration and percentage armor penetration—into a single, comparable number that directly correlates with actual in-game performance. This matters because a 5% DPS increase from optimizing your build can be the difference between winning a crucial teamfight and getting deleted before dealing meaningful damage.

This free online League Of Legends Dps Calculator requires no downloads or signups, giving you instant access to professional-grade damage modeling directly in your browser. With a clean interface and step-by-step breakdown of every calculation, you can trust the results to inform your build paths, rune choices, and even jungle clear speeds without needing a degree in mathematics.

How to Use This League Of Legends Dps Calculator

Using this tool is straightforward, even if you are new to damage theorycrafting. The calculator is designed to accept real in-game stats and item values, so you can directly input numbers from your current game or a planned build. Follow these five simple steps to get accurate DPS results in under a minute.

  1. Enter Champion Base Stats: Start by inputting your champion's base attack damage, ability power (if relevant), and base attack speed. These values are available on the League of Legends wiki or in the client's champion detail page. For example, a level 18 Jinx has 121 base AD and 0.625 base attack speed. Enter these exactly as shown to ensure the calculator uses the correct starting point.
  2. Input Bonus Stats from Items and Runes: Add all bonus attack damage, ability power, attack speed, critical strike chance, and lethality or armor penetration from your current inventory. If you have a full build with items like Infinity Edge (70 AD, 25% crit) and Phantom Dancer (30% AS, 20% crit), sum these values and input them. The calculator automatically handles multiplicative bonuses like Guinsoo's Rageblade's phantom hit effect.
  3. Set Target Armor and Magic Resist: Enter the armor and magic resist of your intended target—typically the enemy ADC (around 80 armor at level 18) or tank (200+ armor). The calculator uses these values to compute effective damage after penetration. For mixed damage champions like Kai'Sa, you can run the calculation twice with different penetration profiles to see which damage type is more effective.
  4. Select Ability Scaling (Optional): For ability-focused champions, toggle the "Ability Rotation" mode and input ability power ratios, base damage, and cooldowns. This allows the tool to calculate sustained DPS over a 5-second window that includes both auto-attacks and spell weaving. For example, a Cassiopeia with 600 AP and Liandry's Torment will have her E spam DPS calculated separately from her auto-attack DPS.
  5. Click "Calculate DPS": Once all fields are filled, click the calculate button. The tool instantly displays your total DPS, effective damage per hit, and a breakdown of how much damage comes from physical versus magical sources. A color-coded graph shows how your DPS changes over a 10-second fight, helping you understand burst versus sustained damage profiles.

For best results, always double-check your attack speed cap (2.5 AS cap for most champions) and ensure you haven't double-counted passive bonuses like Jax's ultimate or Master Yi's Highlander. The calculator includes built-in warnings for common input errors, such as exceeding the crit chance cap (100%) or entering negative armor values.

Formula and Calculation Method

The core formula used in this League Of Legends Dps Calculator is derived from the game's actual damage calculation engine, reverse-engineered from Riot's revealed mechanics and validated against in-game testing. The tool uses a multi-step process that first computes raw damage per hit, then adjusts for attack speed, critical strikes, and target defenses to produce a final DPS value. Understanding this formula helps you interpret the results and make better build decisions.

Formula
DPS = ( (AD_total × (1 + Crit_Chance × (Crit_Damage_Multiplier – 1))) × AS_final × (1 – Damage_Reduction) ) + (AP_DPS × (1 – Magic_Damage_Reduction))

This formula breaks down into three main components: physical auto-attack DPS, ability-based DPS, and the damage reduction applied by target resistances. The critical strike modifier is especially important because Infinity Edge increases the multiplier from 1.75 to 2.15, significantly boosting expected DPS. The attack speed component uses the in-game formula where final attack speed equals base attack speed multiplied by (1 + bonus attack speed percentage), capped at 2.5 attacks per second.

Understanding the Variables

Each variable in the formula directly corresponds to a stat you can modify through items, runes, or champion abilities. AD_total is the sum of base attack damage and all bonus attack damage from items like Bloodthirster, Sterak's Gage, or Gathering Storm rune. Crit_Chance is a decimal value (0.75 for 75% crit chance), and Crit_Damage_Multiplier is 1.75 by default or 2.15 with Infinity Edge. AS_final is your attacks per second after all modifiers, including abilities like Tristana's Rapid Fire or items like Runaan's Hurricane. Damage_Reduction is calculated as armor / (armor + 100) for physical damage, and magic resist / (magic resist + 100) for magic damage, but the calculator also factors in flat penetration and percent penetration before applying this formula.

Step-by-Step Calculation

The calculator processes your inputs in a logical order. First, it sums all flat AD and AP bonuses, then applies percentage modifiers like Gathering Storm's adaptive force or Infernal Drake's buff. Next, it computes the expected damage per auto-attack by averaging critical and non-critical hits. For example, with 200 AD and 50% crit chance, each auto-attack deals (200 × 0.5) + (200 × 1.75 × 0.5) = 100 + 175 = 275 average damage. This value is then multiplied by attack speed to get raw DPS. Simultaneously, the tool calculates effective penetration using the formula: effective armor = (armor × (1 – percent_pen)) – flat_pen. If you have 18 lethality and 35% armor penetration against a target with 100 armor, effective armor becomes (100 × 0.65) – 18 = 65 – 18 = 47. Damage reduction is then 47 / 147 = 0.319, meaning you deal 68.1% of your raw damage. The final DPS is raw DPS multiplied by (1 – damage reduction), plus any magic damage from abilities or item passives like Wit's End.

Example Calculation

To make the math concrete, let's walk through a realistic scenario involving a level 18 Jinx with a standard crit build versus a tanky target. This example shows exactly how the tool processes your inputs and why certain items outperform others in specific situations.

Example Scenario: You are playing Jinx at level 18 with the following items: Infinity Edge, Phantom Dancer, Rapid Firecannon, Lord Dominik's Regards, and Berserker's Greaves. Your total bonus AD is 145 (70 from IE, 30 from LDR, 45 from runes and base growth). Base AD is 121. Total AD = 266. Attack speed: base 0.625, bonus 110% (35% from PD, 35% from RFC, 35% from boots, 5% from runes) = 0.625 × 2.10 = 1.3125 AS. Crit chance: 75% (25% IE, 20% PD, 25% RFC, 5% from runes). Target: enemy Ornn with 250 armor and 50 magic resist.

Step 1: Calculate average auto-attack damage. With 266 AD and 75% crit (1.75x multiplier), expected damage per hit = (266 × 0.25) + (266 × 1.75 × 0.75) = 66.5 + 349.125 = 415.625 average damage per auto. Step 2: Apply attack speed. Raw DPS = 415.625 × 1.3125 = 545.5 DPS before resistances. Step 3: Calculate effective armor with LDR's 35% armor penetration. Effective armor = 250 × 0.65 = 162.5. No flat lethality in this build. Damage reduction = 162.5 / (162.5 + 100) = 0.619, meaning you deal 38.1% of raw damage. Final physical DPS = 545.5 × 0.381 = 207.8 DPS. Step 4: Add any magic damage (Jinx has none from this build). Total DPS = 207.8.

This result tells you that a full crit Jinx deals about 208 DPS to a 250-armor tank, which is quite low. In a real game, you would need to focus squishier targets or consider buying a Void Staff if your team lacks magic damage. The calculator instantly shows this low number, prompting you to consider alternative builds like Kraken Slayer + Guinsoo's for mixed damage or simply repositioning to hit the enemy ADC instead.

Another Example

Now consider a level 18 Vayne with a different build: Blade of the Ruined King, Guinsoo's Rageblade, Kraken Slayer, Wit's End, and Berserker's Greaves. Vayne has 115 base AD, plus 120 bonus AD from items = 235 total AD. Attack speed: base 0.658, bonus 130% (25% BORK, 48% Guinsoo's, 25% Kraken, 40% Wit's, 35% boots) = 0.658 × 2.30 = 1.513 AS. No crit. Against the same Ornn (250 armor, 50 MR), Vayne's Silver Bolts deal 12% max HP true damage every third hit. Raw auto DPS = 235 × 1.513 = 355.6 DPS. After armor reduction (250 armor, no penetration items): damage reduction = 250/350 = 0.714, so physical DPS = 355.6 × 0.286 = 101.7. But Wit's End adds 80 magic damage per hit, and BORK adds 10% current HP physical damage. After 3 seconds, BORK's magic damage (15% of max HP as magic) and Silver Bolts true damage (~250 true damage per proc) dramatically increase total DPS. The calculator accounts for these passives and shows total DPS around 450–500 after ramp-up, far outperforming Jinx against tanks. This comparison demonstrates why Vayne is a tank-buster and Jinx is a teamfight ADC.

Benefits of Using League Of Legends Dps Calculator

Integrating a DPS calculator into your League of Legends preparation routine offers concrete advantages that translate directly into higher win rates and more efficient climbing. Unlike generic damage meters or intuition-based build choices, this tool provides precise, repeatable data that removes emotional bias from itemization decisions. Below are five key benefits that experienced players and coaches consistently cite.

  • Optimized Itemization Against Specific Team Comps: Instead of blindly following recommended builds, you can input the enemy team's average armor and magic resist values to determine whether Lord Dominik's Regards, Void Staff, or Blade of the Ruined King will yield the highest DPS. For example, against a team with three tanks (200+ armor each), the calculator will show that building Serylda's Grudge on a physical caster like Jayce provides 30% armor penetration, while building Eclipse for lethality is nearly useless. This data-driven approach prevents wasted gold on ineffective items.
  • Accurate Power Spike Timing: The calculator lets you compare DPS at different item breakpoints—for instance, 1-item, 2-item, and full build. You can see exactly how much DPS you gain from completing Infinity Edge versus buying a Zeal first. This helps you decide when to take aggressive fights based on your power spike. A common finding is that completing Kraken Slayer on an ADC provides a 40% DPS increase over having only Noonquiver, making level 6–9 fights much stronger.
  • Rune and Summoner Spell Optimization: By toggling rune stats like Lethal Tempo's bonus attack speed or Gathering Storm's AD, you can see the marginal DPS gain of each rune choice. For example, the calculator can show that Lethal Tempo provides 18% more DPS over Press the Attack on a Jinx after 3 seconds of combat, but Press the Attack gives higher burst in the first 2 seconds. This level of granularity helps you tailor your rune page to your playstyle—whether you prefer all-in trades or extended fights.
  • Jungle Clear Speed Analysis: Junglers can input camp HP and resistances (e.g., Red Brambleback has 60 armor, 30 MR at level 1) to calculate clear speed in seconds. By comparing different starting items (Emberknife vs. Hailblade) or skill orders (maxing Q vs. E on Hecarim), you can shave 3–5 seconds off your first clear, which directly impacts gank timing and counter-jungling opportunities. Professional junglers use this data to plan pathing routes.
  • Educational Value for New Players: For players learning the game, the calculator demystifies why certain items are "meta." Seeing that a 200 AD, 0% crit build deals 40% less DPS than a 150 AD, 75% crit build against a squishy target teaches the importance of critical strike chance versus raw AD. This hands-on learning accelerates game knowledge far faster than reading guides alone.

Tips and Tricks for Best Results

To get the most accurate and actionable results from your League Of Legends Dps Calculator, you need to understand a few nuances about how the game's damage system works. These pro tips come from high-elo theorycrafters and data analysts who use similar tools daily to min-max their performance.

Pro Tips

  • Always account for ability rotations, not just auto-attacks. Champions like Zed or LeBlanc deal 70% of their damage through abilities. Input cooldowns and ability power ratios to get a true DPS number over a 5-10 second window. The calculator's "rotation mode" lets you chain spells with auto-attacks for a realistic DPS profile.
  • Use the target armor/magic resist slider to simulate multiple enemy types. A common trick is to run the calculation at 60 armor (squishy ADC), 120 armor (bruiser), and 250 armor (tank). If your DPS drops below 200 against tanks, you need armor penetration or true damage. This three-point test instantly validates your build's versatility.
  • Factor in champion-specific passive interactions. For example, Jax's Counter Strike (E) grants dodge chance that effectively increases his DPS by allowing more auto-attacks to land. Similarly, Master Yi's Highlander resets auto-attack timers. The calculator includes preset profiles for popular champions that auto-apply these passives when you select the champion name from a dropdown menu.
  • Test item builds in pairs rather than individually. Instead of comparing "Infinity Edge" versus "Bloodthirster," compare "Infinity Edge + Phantom Dancer" versus "Bloodthirster + Lord Dominik's Regards." Item synergies (like crit chance with IE, or attack speed with Guinsoo's) dramatically affect DPS and cannot be evaluated in isolation.

Common Mistakes to Avoid