Work Schedule Sleep Calculator
Estimate how your work schedule affects your realistic sleep opportunity, weekly sleep debt, and circadian disruption — based on your actual shift pattern, not a generic average.
Weekly Sleep Debt
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How we calculate this+
Sleep opportunity = 24h − shift length − (commute × 2) − wind-down time − a fixed 2-hour buffer for meals, hygiene, and household/family time.
Weekly sleep debt compares your total realistic weekly sleep opportunity (shift days at your calculated opportunity + days off at the 7.5h adult recommendation) against a weekly target of 7.5h × 7 nights.
This is an arithmetic estimate of schedule-driven sleep opportunity, not a measurement of your actual sleep, and not a validated occupational fatigue risk model.
This tool produces an educational estimate, not a medical device, and cannot diagnose a condition. See our disclaimer for details.
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Frequently asked questions
What counts as "sleep opportunity" versus actual sleep?+
Sleep opportunity is the time realistically available for sleep after work, commute, and essential wind-down/routine time are subtracted from 24 hours. Actual sleep is usually somewhat less than sleep opportunity, since it doesn't account for time spent trying to fall asleep or waking during the night.
Why does a rotating schedule score worse than a fixed night schedule?+
A fixed schedule — even a fixed night schedule — lets your circadian rhythm settle into a consistent pattern over time. Rotating between day and night shifts repeatedly resets that adaptation, which research consistently links to worse sleep outcomes than either fixed pattern alone.
Is this the same as a medical fatigue risk assessment?+
No. This is an educational estimate based on schedule arithmetic, not a validated occupational fatigue risk management tool. If your job involves safety-critical work (driving, operating machinery, patient care), consult your employer's fatigue risk management policy or occupational health provider.
Can I make up for a bad work-week schedule on my days off?+
Only partially. Sleeping in on days off can pay back some acute sleep debt, but research suggests it doesn't fully reverse the effects of chronic short sleep, and very large weekend sleep-ins can actually make the next transition back to your work schedule harder (a pattern sometimes called social jet lag).
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