borderlands 2 calculator - Aaron Graves, PhDude Replica

Borderlands 2 DPS & Time-to-Kill Calculator

Estimate per-shot damage, burst DPS, sustained DPS, and time-to-kill based on your weapon stats, bonuses, and enemy conditions.

Weapon Card Damage (per shot)

Fire Rate (shots/sec)

Magazine Size

Reload Time (seconds)

Total Gun Damage Bonus (%)

Amp Damage (flat bonus per shot)

Critical Damage Bonus (%)

Assume shots are critical hits

Element Matchup Multiplier

Slag Multiplier

Enemy Health (optional, for TTK)

Enter your values and click Calculate.

How this Borderlands 2 calculator helps

Borderlands 2 has a lot of moving parts: card damage, skills, relics, class mods, critical hits, elemental matching, slag, and reload downtime. This calculator gives you a fast way to turn all those pieces into practical numbers. Instead of guessing, you can compare loadouts with consistent math.

The goal here is not to replace in-game testing, but to narrow your choices quickly. If two guns feel similar, this tool can show which one has better burst damage or better long-fight sustained DPS.

What the calculator outputs

Adjusted Damage per Shot: damage after bonuses, crit assumptions, elemental multiplier, and slag.
Burst DPS: damage per second while you are actively firing.
Sustained DPS: includes reload downtime and is more realistic for long fights.
Magazine Damage: total damage dumped before reloading.
Shots to Kill / Time to Kill: if enemy health is provided.

Formula used

Adjusted Shot Damage = (Base Damage + Amp Damage) × (1 + Gun Bonus%) × (Crit Multiplier if enabled) × Elemental Multiplier × Slag Multiplier Burst DPS = Adjusted Shot Damage × Fire Rate Sustained DPS = (Adjusted Shot Damage × Magazine Size) ÷ ((Magazine Size ÷ Fire Rate) + Reload Time) Shots to Kill = ceil(Enemy Health ÷ Adjusted Shot Damage) TTK (seconds) = Enemy Health ÷ Sustained DPS

Important note

Borderlands 2 has weapon-specific mechanics (pellet count, splash behavior, unlisted bonuses, and skill interactions). This calculator is a strong baseline model, especially for quick comparisons, but it should be treated as an estimate.

Practical build optimization tips

1) Don’t overvalue card damage alone

A lower card damage gun can outperform a higher card damage gun if it has better fire rate, reload speed, or crit consistency. Sustained DPS is often the stat that matters most in real combat.

2) Element matching is huge

If you are fighting flesh, armor, and shields in the same zone, weapon swapping for element advantage can beat pure raw damage builds. Use the multiplier field to see how quickly this changes your outcomes.

3) Slag massively changes endgame pacing

In UVHM, slag scaling can transform breakpoints. Use the slag selector to model both situations: with and without slag. This can help decide whether your support setup is worth the slot.

4) Crit consistency determines real performance

If your aim or encounter design doesn’t allow frequent crits, disable crit assumptions for a more realistic number. A “paper DPS king” can underperform badly when crit uptime drops.

Example comparison workflow

Enter Gun A values and record sustained DPS/TTK.
Change to Gun B values only (leave enemy conditions the same).
Check both no-slag and slag scenarios.
Run one pass with crit enabled and one without.
Pick the loadout that wins in the scenario you actually play most.

Frequently asked questions

Does this include pellet count and splash formulas?

Not directly. If your weapon has multiple pellets, you can approximate by multiplying base damage accordingly, then validating in game.

Is this calculator good for all vault hunters?

Yes, as a base model. Just combine your character’s skills and gear effects into the input bonuses.

Can I use this for raid boss planning?

Absolutely. Enter the boss health estimate, test your expected crit/slag uptime, and compare weapons or skill setups before farming.