Fatigue Score Calculator
Calculate your fatigue level based on sleep, activity, and stress
🔒 Private · Method · · Disclaimer · Fatigue Score Calculator
Fatigue Score Calculator is built for calculating your fatigue level based on sleep, activity, and stress — fast, free, and private. Just enter Avg Sleep Last 3 Days (hours), Physical Activity (1-10) and Stress Level (1-10); Fatigue Score updates the result as you type. Nothing in Fatigue Score is a black box. Anyone comparing options in Health can use Fatigue Score to compare scenarios. You can disconnect once Fatigue Score has loaded; the arithmetic runs locally. Fatigue Score is part of the Health collection on CalcProMaster, alongside fatigue calculator, tiredness score and more. The labels in Fatigue Score match the terms in its result. Fatigue Score is free, instant and local.
What the defaults give
6 hours of sleep, activity at 4 and stress at 7 gives a score of 47/100, which the tool labels significant fatigue.
Read the number upwards: 12 hours of sleep or stress at 3.5 pushes it to 72–82, and those read as low fatigue.
How the score is assembled
Sleep component = min(10, hours ÷ 0.8) × 10
Stress penalty = stress × 10
Activity bonus = activity × 3
Score = sleep − stress + activity + 30, clamped to 0–100
Six hours gives a sleep component of 75, stress costs 70, activity adds 12, and the 30-point base brings it to 47. The name is the confusing part: a higher score means less fatigue, so 47 is a middling, tired day and 82 is a rested one.
Worked examples
6h, activity 4, stress 7 → 47, significant fatigue
3h → 10, significant fatigue
12h → 72, low fatigue
activity 2 → 41
activity 8 → 59
stress 3.5 → 82, low fatigue
stress 14 → 0, the floor
Stress is weighted heaviest: three and a half points of stress are worth 35 points of score, more than doubling the sleep contribution. Sleep is capped at eight hours — anything beyond that adds nothing, on the reasonable assumption that oversleeping does not keep improving how you feel.
Using it honestly
This is a self-report arithmetic model, not a measurement. It has no idea whether your six hours were uninterrupted, whether the stress is a deadline or a bereavement, or whether the activity was a hard run or a short walk. The value is in seeing which input is dragging the number down: for the default, stress accounts for 70 of the 100 points available, so that is where a change would matter.
Persistent fatigue that does not respond to sleep, or that comes with breathlessness, weight change or low mood, is a medical question rather than a scoring one. The same applies to fatigue lasting more than a few weeks.
Track it over a fortnight rather than judging a single day. One 47 tells you little; seven days of 40s after a holiday tells you something.
Score it at the same time each evening, before the day’s frustration has faded and while the sleep figure is still accurate. Consistency of timing matters more than precision of the inputs.
Frequently Asked Questions
What does a score of 47 mean?
It reads as significant fatigue on this scale. Higher is better — 70 and above is labelled low fatigue.
Why does more sleep raise the score?
The score measures how rested you are, despite its name. Sleep adds to it and stress subtracts, capped at eight hours.
Which input matters most?
Stress, at 10 points per unit. Moving stress from 7 to 3.5 lifts the score by 35, more than any realistic sleep change.
Is this a medical assessment?
No. It is arithmetic on three self-reported numbers and cannot diagnose anything.
What if my fatigue persists?
Fatigue lasting weeks, or accompanied by other symptoms, should be discussed with a clinician rather than tracked with a calculator.
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