If you have ever pressed R on Garen and wondered, “How did that not kill?”, this garen ult calculator is for you. It estimates whether Demacian Justice is lethal based on target health, missing health scaling, shields, and optional damage reduction.
What this garen ult calculator does
The calculator estimates your ultimate damage using the standard execute-style formula for Garen’s R and compares that against a target’s effective HP (current HP + shields). It gives you:
- Total calculated ult damage.
- Whether your ult should kill right now.
- How much HP the target survives with (if not lethal).
- The approximate HP threshold where your ult becomes lethal.
Demacian Justice formula (used here)
This page uses the following values:
- R1: 150 + 25% of target missing HP
- R2: 300 + 30% of target missing HP
- R3: 450 + 35% of target missing HP
AdjustedDamage = RawDamage × (1 - DamageReduction%)
Lethal if: AdjustedDamage ≥ (CurrentHP + Shield)
Because Garen’s ult is true damage, armor and magic resist are generally not part of this simple model. However, damage reduction effects and shields can still prevent the kill, which is why those fields are included.
How to use the calculator
1) Select your ult rank
Choose rank 1, 2, or 3 based on your current level and ability points.
2) Enter target health values
Input the target’s max HP and current HP. The calculator automatically computes missing HP.
3) Add shields and reduction if needed
If the enemy has a visible shield, enter it. If they are under a damage reduction effect, add that percentage too.
4) Click calculate
You will instantly see if your ult is lethal and where the execute threshold is.
Worked example
Suppose your ult is rank 2, the target has 2500 max HP and 1000 current HP, with no shield and no reduction:
- Missing HP = 2500 - 1000 = 1500
- Damage = 300 + (0.30 × 1500) = 750
- Target effective HP = 1000
- Result: not lethal, target survives with roughly 250 HP
Why your ult may not kill in real games
Shields
Even a small shield can flip a clean execute into a survive. Barrier, support shields, and item shields matter.
Damage reduction
Exhaust or champion abilities that reduce incoming damage can make your ult deal less than expected.
Healing and timing
In live combat, heals, runes, and item procs can trigger between your damage expectations and the actual cast timing.
Untargetability or immunity windows
Some champions can avoid execution windows with stasis, untargetability, or invulnerability mechanics.
Quick Garen execute tips
- Track enemy shields before committing your R.
- Use your combo first to increase missing HP value on ult.
- Be careful ulting into heavy peel or Exhaust.
- If in doubt, wait one extra auto/Q tick to push the target under threshold.
FAQ
Does armor reduce Garen ult damage?
In this model, no. The ult is treated as true damage, so armor and MR are not applied here.
Why include damage reduction then?
Some effects reduce incoming damage regardless of damage type. Those effects can still lower effective ult damage.
Is this a perfect in-game simulator?
No calculator can capture every edge case. Use this as a strong decision helper, then account for game state and timing.
Final thoughts
A good garen ult calculator helps turn “maybe” executes into confident kills. Use it to learn thresholds by feel, then apply that intuition in teamfights and skirmishes. Demacia rewards certainty.