0 hours and 12 minutes = 12 minutes. That's 720 seconds, or 0.2000 decimal hours. Common uses include timesheet calculations, payroll math, and duration conversion.
Common conversions
| Hours | Minutes | Total minutes | Decimal hours |
|---|---|---|---|
| 0:15 | 15 | 15 | 0.25 |
| 0:30 | 30 | 30 | 0.50 |
| 0:45 | 45 | 45 | 0.75 |
| 1:00 | 0 | 60 | 1.00 |
| 1:30 | 30 | 90 | 1.50 |
| 2:00 | 0 | 120 | 2.00 |
| 8:00 | 0 | 480 | 8.00 |
| 8:30 | 30 | 510 | 8.50 |
| 24:00 | 0 | 1,440 | 24.00 |
💡 Did you know? Some payroll systems bill in decimal hours rather than HH:MM. If you worked 7 hours 45 minutes, that's 7.75 hours (not 7:45). Misreading "7.75" as "7 hours 75 minutes" is a common error — decimal hours always use base-10 fractions of an hour.
Frequently Asked Questions
0 hours and 12 minutes = 0 + 12 = 12 minutes. Formula: total minutes = (hours × 60) + minutes.
0 hours and 12 minutes = 12 minutes = 720 seconds. Formula: total seconds = (hours × 3600) + (minutes × 60).
0:1212 = 0.2000 decimal hours. Used in timesheets and billing systems that don't use HH:MM format.
In Excel: =HOUR(A1)*60 + MINUTE(A1). For decimal hours: =HOUR(A1) + MINUTE(A1)/60. Or use: =A1*1440 (where A1 is a time value formatted as HH:MM).
8 hours 30 minutes = (8 × 60) + 30 = 510 minutes. Use the form above with 8 hours and 30 minutes to verify.
2:15 (2 hours 15 minutes) = (2 × 60) + 15 = 135 minutes. The hours go in the "Hours" field, the 15 (just the minutes part) goes in the "Minutes" field.
Common uses: timesheet calculations (total minutes worked), payroll (some systems pay per minute), cooking time conversion, video/audio duration math, exercise/workout duration.
They are the same! 1.5 hours = 1 hour + 0.5 hours = 1 hour + 30 minutes = 1:30. Decimal hours and HH:MM format are interchangeable, just different notations.