Minutes to Hours Converter
Hours and minutes plus decimal hours, since timesheets want one and people say the other.
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Hours and minutes versus decimal hours
90 min = 1 h 30 min = 1.5 decimal hours
People say one hour thirty. Payroll wants 1.5. They are the same duration written two ways, and confusing them is a common timesheet error: entering 1.30 for one hour thirty understates the time by eighteen minutes.
The quarter-hour column is shown because many payroll systems use it, not as advice that you should. Whether rounding is permitted, and in which direction, depends on the employment rules where you work.
Conversion table
| Minutes | Hours and minutes | Decimal hours | Payroll rounding (1/4 h) |
|---|---|---|---|
| 15 min | 0 h 15 min | 0.25 | 0.25 |
| 20 min | 0 h 20 min | 0.3333 | 0.25 |
| 30 min | 0 h 30 min | 0.5 | 0.50 |
| 40 min | 0 h 40 min | 0.6667 | 0.75 |
| 45 min | 0 h 45 min | 0.75 | 0.75 |
| 50 min | 0 h 50 min | 0.8333 | 0.75 |
| 60 min | 1 h 0 min | 1 | 1.00 |
| 75 min | 1 h 15 min | 1.25 | 1.25 |
| 90 min | 1 h 30 min | 1.5 | 1.50 |
| 100 min | 1 h 40 min | 1.6667 | 1.75 |
| 120 min | 2 h 0 min | 2 | 2.00 |
| 135 min | 2 h 15 min | 2.25 | 2.25 |
| 150 min | 2 h 30 min | 2.5 | 2.50 |
| 180 min | 3 h 0 min | 3 | 3.00 |
Common questions
What is 90 minutes in hours?
90 minutes is 1 hour 30 minutes, which is 1.5 decimal hours. The two forms matter because timesheets and payroll usually want the decimal, where 1 hour 30 is 1.5 and not 1.30.
What is 20 minutes as a decimal hour?
0.3333 hours, repeating. Timesheets usually round this to 0.33, and payroll systems often round to the nearest quarter hour, giving 0.25.
Why do timesheets use decimal hours?
Because multiplying a decimal by an hourly rate is easy, while multiplying hours and minutes isn't. It's a payroll convenience rather than a different unit.
Does rounding to the quarter hour lose money?
It can go either way on any single entry, since it rounds up as often as down. Whether it is permitted at all depends on your local employment rules, so check those rather than relying on a converter.
Related converters and guides
Sources
- Minutes, hours and seconds are related by exact definitional factors of 60. There is no external conversion factor to cite. The second is an SI base unit; the minute and hour are accepted for use with the SI.