Free Cognitive Load Estimator

Estimate your current cognitive load based on task complexity, multitasking, and fatigue level.

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Cognitive Load Score

10 /100

Fatigue Multiplier1.00 x
Remaining Capacity90 %

Cognitive Load Score vs Task Complexity (1-10)

View formula & how it works →

Cognitive Load Model

Load = Complexity x sqrt(Tasks) x Fatigue Factor

Cognitive load increases with task complexity, the number of simultaneous tasks (scaling as square root to reflect that each additional task adds less than the previous), and fatigue.

Fatigue Factor

Fatigue increases when:

  • Focused work exceeds 4 hours (+10% per extra hour)
  • Sleep was under 7 hours (+15% per hour of deficit)

    • Interpretation

    ScoreLevel 0-30Low (room for more) 31-60Moderate (productive zone) 61-80High (error-prone) 81+Overloaded (take a break)

    Example Calculation

    Complexity 6, 3 tasks, 4 hours focused, 7 hours sleep.

    1. 01Fatigue factor = 1 + 0 + 0 = 1.0
    2. 02Load = 6 x sqrt(3) x 1.0 = 6 x 1.73 = 10.4
    3. 03Score = 10 (Low load)

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