How Time Calculations Work
Time uses a base-60 system for minutes and seconds. When adding time, 60 seconds becomes 1 minute and 60 minutes becomes 1 hour.
Total Seconds = Hours × 3600 + Minutes × 60 + Seconds
Time Unit Conversions
- 1 hour = 60 minutes = 3,600 seconds
- 1 day = 24 hours = 1,440 minutes = 86,400 seconds
- 1 week = 7 days = 168 hours = 604,800 seconds
Frequently Asked Questions
How do I convert minutes to decimal hours? Divide minutes by 60. For example, 45 minutes = 45/60 = 0.75 hours. So 2:45 = 2.75 decimal hours.
How do I add time on a timesheet? Convert each entry to total minutes, sum them up, then convert back. Or use our calculator above to add multiple time entries.