League of Legends Build Calculator
Theorycraft and instantly calculate the final stats for your champion builds.
Stat Calculator
Base Champion Stats
Champion’s HP at current level without items.
Champion’s AD without items or runes.
Usually 0 unless from runes or abilities.
Champion’s Armor without items.
Champion’s MR without items.
Champion’s base AS at level 1.
Item Stats (Bonus)
Enter the total stats provided by your items and runes. You can sum them up manually and enter the total in the ‘Item 1’ slots.
Sum of all % Attack Speed bonuses.
Total Health
650
Total AD
60
Total AP
0
Total Armor
35
Total MR
32
Final Attack Speed
0.625
Chart: Final Combat Stats Overview
What is a League of Legends Build Calculator?
A league of legends build calculator is a tool designed for players to theorycraft and determine the final statistics of a champion with a specific combination of items and runes. Instead of having to go into the game’s practice tool, players can quickly input values to see how a build would perform. This is crucial for understanding a champion’s power spikes, defensive capabilities, and overall damage output before committing to a build in a live match. Users can calculate key stats like total health, attack damage (AD), ability power (AP), armor, magic resist (MR), and attack speed.
The Formula Behind Stat Calculation
The core of any league of legends build calculator is the aggregation of stats from different sources. The fundamental formula is quite simple:
Total Stat = Base Stat (from champion and level) + Sum of All Bonus Stats (from items, runes, etc.)
This applies to most stats directly. However, some, like Attack Speed, have a slightly more complex calculation involving the champion’s base attack speed.
| Variable | Meaning | Unit | Typical Range (Mid-Game) |
|---|---|---|---|
| Health (HP) | The champion’s total life points. | Points | 1500 – 3500 |
| Attack Damage (AD) | Increases physical damage from basic attacks and some abilities. | Points | 100 – 350 |
| Ability Power (AP) | Increases magic damage from most abilities. | Points | 0 – 700 |
| Armor | Reduces incoming physical damage. | Points | 80 – 250 |
| Magic Resist (MR) | Reduces incoming magic damage. | Points | 60 – 200 |
| Attack Speed | The number of basic attacks per second. | Attacks/Second | 0.8 – 2.0 |
Practical Examples
Example 1: ADC Mid-Game Build
Imagine a Level 11 Jinx with a Kraken Slayer and Phantom Dancer. Her base stats and the items’ stats would be summed up to find her total combat power.
- Inputs: Base HP: ~1200, Base AD: ~85, Bonus AD from items: 105, Bonus AS %: 95%.
- Results: This build would result in very high attack speed and significant AD, making her a formidable damage dealer, which you could confirm with a league of legends build calculator. For more details on ADC builds, you can check our Best ADC Builds guide.
Example 2: Tank Top-Laner Build
A Level 13 Ornn with Sunfire Aegis and Thornmail.
- Inputs: Base HP: ~1500, Base Armor: ~70, Bonus HP from items: 850, Bonus Armor: 110.
- Results: The calculator would show immense total health and armor, making him extremely difficult for physical damage champions to kill. Learn more about tank items at our Tank Item Optimizer.
How to Use This League of Legends Build Calculator
Using this calculator is a straightforward process designed for quick analysis:
- Enter Base Stats: Input your champion’s current base statistics for Health, AD, AP, Armor, MR, and Attack Speed. You can find these in-game by hovering over your stats.
- Add Item & Rune Stats: Sum the bonus stats from all your completed items and selected runes. Enter these totals into the “Item Stats” section.
- Review Results: The calculator will automatically update and display your champion’s final stats in the results area. The chart provides a quick visual comparison of your offensive and defensive power.
- Analyze and Adapt: Use these results to decide if your build meets your needs. Do you need more damage? Or perhaps more survivability? You can find more info at this LoL Item Guide.
Key Factors That Affect Your Build
- Champion Scaling: Some champions gain more stats per level or have abilities that scale better with certain stats.
- Enemy Team Composition: Facing a team with heavy magic damage? You’ll need more MR. A league of legends build calculator can help you find the right balance.
- Game Phase: Early game builds might prioritize cheaper, more efficient items, while late-game builds focus on maximizing a specific stat like AD or AP.
- Your Role: A tank’s build will be drastically different from a marksman’s. Your job in teamfights dictates your itemization priorities. Check our Mage DPS Calculator for role-specific calculations.
- Gold Advantage: Being ahead or behind in gold significantly impacts your build path and what you can afford.
- Synergy Between Items: Some items work incredibly well together (e.g., items that both provide Ability Haste).
Frequently Asked Questions (FAQ)
How are stats from runes handled?
You should add the stats from your selected runes (like bonus AD from Adaptive Force) to the “Item Stats” fields.
Does this calculator include unique passives like Blade of the Ruined King?
This calculator focuses on raw stat aggregation. It does not calculate the damage from unique item passives or active effects, as those are often situational.
Why is Attack Speed calculated differently?
Bonus attack speed is a percentage that modifies the champion’s base attack speed, rather than a flat addition. The formula is: Final AS = Base AS * (1 + (Bonus AS / 100)).
How accurate is this league of legends build calculator?
It is highly accurate for calculating the total value of the main combat stats based on your inputs. For complex interactions and passive effects, the in-game tool remains the definitive source.
Can I calculate stats for a specific champion level?
Yes, by inputting the champion’s base stats for that specific level into the “Base Champion Stats” section.
Where can I find my champion’s base stats?
The official League of Legends wiki or various fan sites provide detailed tables of all champion stats at level 1 and their growth per level. You can also see them in-game.
Does this account for armor/magic penetration?
This calculator determines your champion’s total stats, not the damage dealt to an enemy. Damage calculation, including penetration, is a separate step that depends on the target’s stats.
What’s a good balance between offensive and defensive stats?
This depends entirely on your champion’s role. Carries prioritize offense, while tanks and supports focus on defense. Bruisers aim for a mix of both.
Related Tools and Internal Resources
Explore more of our tools to master your game:
- ADC DPS Calculator: A specialized tool for calculating the damage per second for marksman champions.
- Comprehensive LoL Item Guide: Our in-depth guide to every item in the game.
- Tank Build Calculator: Focus on maximizing survivability with this specialized calculator.
- Understanding Armor and Magic Penetration: A guide on how damage reduction and penetration work.
- Mage DPS Calculator: Calculate burst and sustained damage for AP champions.
- Best ADC Builds: A curated list of top-performing builds for marksmen.