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The time duration from 3am to 7am is exactly 4 hours, which equals 240 minutes or 14400 seconds.
3am to 7am spans 4 hours. This period is during the early morning hours when most people are asleep.
The calculator above automatically sets the times to 3am (03:00) and 7am (07:00), but you can adjust the date or add seconds for more specific calculations.