Convert hours to days
To convert hours to days: one hour is 0.041666667 days, so 48 hours is 2 days. That factor is an average rather than a definition, as explained below.
In days
- Conversion factor Exact.
- 1 hour = 0.0416666667 days
- In every unit
- 172,800,000 ms 172,800 s 2,880 min 48 h 2 day 0.28571 week 0.06571 month 0.0054758 year
- As hours and minutes
- 48:00
- 7.25 decimal hours Multiply the fractional part by 60: 0.25 x 60 = 15 minutes.
- 7 hours 15 minutes (7:15)
- And the other way
- 7:15 is 7.25 decimal hours
- Minutes that convert cleanly
- 15 = 0.25, 30 = 0.50, 45 = 0.75
| Minutes | Decimal hours | Minutes | Decimal hours |
|---|---|---|---|
| 0 | 0 | 30 | 0.5 |
| 5 | 0.0833 | 35 | 0.5833 |
| 10 | 0.1667 | 40 | 0.6667 |
| 15 | 0.25 | 45 | 0.75 |
| 20 | 0.3333 | 50 | 0.8333 |
| 25 | 0.4167 | 55 | 0.9167 |
How the Time Converter works
One hour is exactly 1/24 of a day. A day is 86,400 seconds and an hour 3,600, so the factor is exact. Unlike a month or a year, a day has a fixed length for every purpose this converter serves.
Worked through: 48 h x 0.0416666667 = 2 day.
Going the other way, one day is 24 hours.
For mental arithmetic: Divide by 24. 48 hours is 2 days and 168 is a week.
Calendar days and working days are what trips this up. 72 hours is exactly 3 days, and a '72-hour' deadline set on Friday afternoon expires on Monday afternoon whether or not anyone works the weekend. But 40 hours is 1.67 calendar days and five working days of eight hours, and estimates written in hours get converted to days both ways in the same conversation. The other number worth having is 168: there are 168 hours in a week, so a 40-hour job is under a quarter of it, and any schedule that adds up to more than 168 hours of anything has double-counted.
Precision is worth matching to the input. A measurement given as 6 h carries one or two significant figures, and reporting its conversion to six implies a precision the original never had.
Time Converter FAQ
How many days are in a hour?
0.041666667. One hour is exactly 1/24 of a day. A day is 86,400 seconds and an hour 3,600, so the factor is exact. Unlike a month or a year, a day has a fixed length for every purpose this converter serves.
What is 48 h in days?
2 day. Multiply by 0.041666667: 48 h x 0.0416666667 = 2 day.
How do I convert days back to hours?
Divide by 0.041666667, or equivalently multiply by 24. One day is 24 hours. The two factors are reciprocals, so you only need to remember one of them.
Is there a quick way to do this in my head?
Divide by 24. 48 hours is 2 days and 168 is a week. It is close enough for everyday use.
More from the Time Converter
- days to months
- hours to minutes
- minutes to hours
- years to days
- seconds to hours
- years to hours
- hours to seconds
- months to days