Free Healthcare Tool
Sleep-Duration Planner
Calculate elapsed sleep time between a bedtime and a wake time.
What this answers:
- Between a chosen bedtime and wake time, how much sleep time does that add up to?
This is simple elapsed-time arithmetic. It does not assume universal 90-minute sleep cycles or claim an ideal waking time.
Sleep duration
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How it's calculated
duration = wake time − bedtime − awake minutes (wraps past midnight automatically)
Worked example
Bed 11:00 PM, wake 7:00 AM: 8h 0m. With 30 minutes awake in between: 7h 30m.
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