Diablo IV Cooldown Reduction Calculator

Calculate your effective cooldown with multiplicative CDR stacking

Skill Selection

These skills gain extra CDR from ranks as a separate multiplicative source, allowing up to 85% total CDR.

1
20

CDR Sources (Gear, Passives, Paragon)

These sources stack multiplicatively and are capped at 75% total

Results

Skill Rank CDR

0.0%

Gear/Passive CDR

0.0%

Total CDR

0.0%

Final Cooldown

0.00s

(Base: 11s)

Calculation Breakdown

1. Skill Rank CDR: 0.0%

2. Gear CDR Sources: None

3. Gear CDR Total: 0.0% (multiplicative, capped at 75%)

4. Combined CDR: 1 - (1 - 0.0%) × (1 - 0.0%) = 0.0%

5. Final Cooldown: 11s × 1.000 = 0.00s

How CDR Works

  • • Gear/Passive CDR sources stack multiplicatively (not additive)
  • • Gear/Passive CDR is capped at 75% total
  • • Skill Rank CDR is applied separately and can exceed the 75% cap
  • • Final CDR can exceed 75% when combining both sources
  • • Only certain skills gain CDR from skill points

⚡ Tip: One 50% CDR beats two smaller ones such as 30% + 20%.