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Flat versus Percentage Cooldown Reduction

Compare two explicitly ordered cooldown-reduction rules.

Gaming workspace● Runs in your browser
01 Your input
02 Your result
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FormulaFlat then percent = Math.max(0,base-flat)*(1-percent/100); Percent then flat = Math.max(0,base*(1-percent/100)-flat)

Made for real tasks

  • Compare two explicitly ordered cooldown-reduction rules.
  • Compare two scenarios by changing the inputs and rerunning the tool.
Explore step-by-step workflows →

Worked example

Inputs

Base
20 s
Flat
3 s
Percent
25 %

Expected results

Flat then percent
12.75 s
Percent then flat
12 s

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

How to use this tool

  1. Enter base, flat, percent.
  2. Use consistent units shown beside each input. Run the calculation and review the assumptions below.

Try this example

{
  "base": 20,
  "flat": 3,
  "percent": 25
}

Accuracy and scope

Two explicit rule-order scenarios with a zero lower bound. Does not infer a game’s stacking rules, minimum cooldown, haste conversion or rounding.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.