Free Online Cooldown Reduction Calculator
Quick and accurate calculations
Game Selection & Settings
Calculation Results
Game Info
Performance Metrics
How Cooldown Reduction Works
Supported Games (60+)
Key Concepts
How to Use This Calculator
Step-by-Step Guide
- 1. Select Category: Choose your game genre (MOBA, MMORPG, ARPG, etc.) to filter available games
- 2. Choose Game: Search and select your specific game from the dropdown list
- 3. Enter Base Cooldown: Input the original cooldown of your ability in seconds
- 4. Input CDR Value: Enter your CDR amount using the game's specific system (%, Ability Haste, etc.)
- 5. View Results: See instant calculations with warnings and performance metrics
Understanding CDR Types
Reading the Results
- Effective CDR: Your actual cooldown reduction percentage after caps and conversions
- Final Cooldown: The new ability cooldown after CDR is applied
- Casts per Minute: How often you can use the ability (useful for DPS calculations)
- DPS Increase: Theoretical damage increase from more frequent ability usage
- Performance Metrics: Additional stats like time saved and efficiency gains
- Warnings: Game-specific advice about caps, diminishing returns, or optimization tips
Pro Tips
- Consider resource costs - high CDR is useless without mana/energy
- Balance CDR with damage stats for optimal DPS
- Check game-specific caps and diminishing returns
- Use the search feature to quickly find your game
- Pay attention to warnings for optimization advice
CDR Mechanics Deep Dive
Formula Types Explained
Every point of Ability Haste provides the same value. 100 AH = 50% CDR, 200 AH = 66.7% CDR
Traditional system with diminishing returns. Each additional % becomes less valuable.
Used in roguelike games. Infinite stacks approach but never reach 100%.
Game-Specific Systems
CDR Optimization Strategies
Damage Dealers
- Focus on damage-dealing abilities first
- Consider mana/energy sustainability
- Don't sacrifice too much raw damage
- Evaluate DPS increase vs other stats
Support/Utility
- Prioritize crowd control abilities
- Focus on team fight utility
- Consider cooldown of protective abilities
- Balance with survivability stats
Tank/Initiator
- Focus on engagement abilities
- Don't sacrifice too much defense
- Consider escape/disengage cooldowns
- Balance with health/resistance stats
⚠️ Common CDR Mistakes
- Overcapping CDR beyond game limits
- Ignoring resource (mana/energy) sustainability
- Building CDR on abilities you rarely use
- Not considering cast times and animation locks
- Focusing CDR over core damage/survivability
- Not adapting CDR to game phase (early vs late)
- Ignoring diminishing returns in percentage systems
- Building CDR without considering team composition
All Supported Games (90)
Game Coverage Statistics
Frequently Asked Questions
What's the difference between Ability Haste and traditional CDR?
Traditional CDR uses percentage reduction with diminishing returns - each additional 1% CDR becomes less valuable. For example, going from 0% to 10% CDR gives you 11.1% more casts, but going from 40% to 50% CDR only gives you 16.7% more casts.
Ability Haste (introduced in League of Legends) provides linear scaling where every point of Ability Haste has the same value. 100 AH = 50% CDR, 200 AH = 66.7% CDR, and each additional 100 AH always provides the same benefit.
Why do some games have different CDR calculation methods?
Game developers use different CDR systems to achieve specific gameplay goals. Linear systems (like Ability Haste) prevent excessive CDR stacking, while percentage systems create meaningful itemization choices with diminishing returns.
Some games integrate CDR with other mechanics - WoW's Haste affects both cast time and cooldowns, while Genshin Impact's Energy Recharge affects burst availability rather than direct cooldowns.
How should I balance CDR with other stats?
The optimal CDR balance depends on your role, game phase, and resource management. Damage dealers typically want 20-40% CDR, supports may prioritize 40-60% for utility, while tanks often prefer survivability over maximum CDR.
Consider your mana/energy limitations - high CDR is useless if you can't sustain the resource cost. Also evaluate the opportunity cost: is 10% more CDR worth losing significant damage or survivability stats?
Do all abilities benefit equally from CDR?
No. Ultimate abilities in MOBAs often have different CDR scaling. Some games have abilities immune to CDR (like Dota 2's BKB). Movement abilities may have separate cooldown mechanics. Resource-based abilities need sustainable mana/energy to benefit from CDR.
Always check your game's specific mechanics for each ability type.
What are diminishing returns in CDR?
Diminishing returns mean each additional point of CDR becomes less valuable. Going from 0% to 10% CDR reduces cooldowns by 10%, but going from 40% to 50% CDR only reduces actual cooldown by ~6.7%.
This is why many games switched to systems like Ability Haste (linear scaling) or cap CDR at reasonable levels.
Can I have negative cooldowns or infinite CDR?
No game allows negative cooldowns or infinite CDR. Most games have hard caps (like Diablo 3's 75%) or soft caps through diminishing returns. Even games with 'unlimited' CDR like current League of Legends have practical limits where additional CDR provides negligible benefit.
The calculator includes warnings when you approach these limits.
How does CDR affect DPS and overall performance?
CDR increases sustained DPS by allowing more frequent ability usage, but the relationship isn't always linear. You must consider: mana/resource constraints, cast times, animation locks, and opportunity costs of CDR vs. direct damage stats.
In burst scenarios, CDR may be less valuable than raw damage. The calculator shows DPS increase estimates, but actual performance depends on your specific rotation and playstyle.
Which games benefit most from high CDR builds?
Games with abundant resource generation (like League of Legends with mana items) or resource-free abilities benefit most from high CDR. Support-focused games where utility uptime matters more than raw damage also favor CDR builds.
Conversely, games with strict resource limitations or long cast times may not benefit as much from maximum CDR investment.