Guide and Calculation Limits
How to build a combo, read results, and understand what the calculator can and cannot model.
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How to calculate
- Select an attacker.
- Set the combo and attacker conditions. Add abilities or basic attacks, then set level, ability ranks, items and keystone.
- Set target conditions. Select a champion or enter HP, Armor and Magic Resist.
- Press Calculate Damage.
Reading the result
The result shows final HP damage, percentage of target maximum HP, and each combo step’s contribution. A borderline result intentionally avoids claiming a definite kill.
Calculation scope and limits
- Only options supported by the current data are selectable.
- Cooldowns, elapsed-time DPS and simultaneous multi-target damage are not modeled.
- Summoner spells, secondary runes and stat shards are out of scope.
- If an unsupported element is discovered, the calculator withholds the full numeric result.
- Mitigation, penetration and shield behavior has not been verified against every in-game interaction.
See game data details for the patch and sources.
Required environment
JavaScript is required. The first page load and bundled-data download require a network connection; calculations then run in the browser.