Hours to days
Multiply hours by 0.0416667 to get days.
48 h = 2 d
How to convert hours to days
The day is exactly 24 hours (86 400 seconds). The hour is exactly 60 minutes (3600 seconds).
Worked example — 48 h: 48 × 0.0416667 = 2 d.
Hours to days table
| Hours | Days |
|---|---|
| 1 h | 0.0416667 d |
| 6 h | 0.25 d |
| 12 h | 0.5 d |
| 24 h | 1 d |
| 48 h | 2 d |
| 72 h | 3 d |
| 100 h | 4.1667 d |
| 168 h | 7 d |
| 720 h | 30 d |
Reverse and related
About hours and days
Hour (h)
1 h = 0.0416667 dDefinition. Exactly 60 minutes (3600 seconds)
History and origin
The hour divides the day into 24 parts, a scheme inherited from ancient Egypt, and equals exactly 60 minutes or 3600 seconds. Fixed-length hours replaced older seasonal hours as mechanical clocks spread.
Current use
Hours structure the working day, schedules and pay, and are read off every clock.
Source: BIPM SI Brochure (2019); the second is defined by the caesium-133 transition
Day (d)
1 d = 24 hDefinition. Exactly 24 hours (86 400 seconds)
History and origin
The day is based on one rotation of the Earth and is fixed for timekeeping at exactly 24 hours, or 86 400 seconds. The natural day varies slightly, so a mean value is used.
Current use
Days are the basic unit of the calendar and of everyday durations.
Source: BIPM SI Brochure (2019); the second is defined by the caesium-133 transition
Where people use this
Hours: schedules, work and pay. Days: calendars, durations. 24 hours is exactly 1 day.
Every value is carried to full double precision; the display is rounded.
Both units are defined in BIPM SI Brochure (2019); the second is defined by the caesium-133 transition.
Questions people ask
How many days is 48 hours?
48 hours is 2 days.
How many hours in a day?
One day is exactly 24 hours.
How many days is 72 hours?
72 hours is 3 days.