Time Converter
Find the units to convert
Day to Hour Converter
Use this page to convert day values into hour, with background details, formulas, a worked example, and a quick conversion table.
Conversion formula
1 d = 24 h
1 h = 0.0416666666666667 d
Example: 48 d = 1,152 h
Day
A day equals 24 hours or 86,400 seconds.
History: It comes from the Earth rotation cycle.
Current use: Days are used in calendars, planning, and delivery windows.
Also written as d, days.
Hour
An hour equals 60 minutes or 3,600 seconds.
History: Hours became standard in civil timekeeping through mechanical and astronomical systems.
Current use: Hours are used in work logs, travel, and timetables.
Also written as h, hr, hrs, hours.
Day to Hour table
| Day [d] | Hour [h] |
|---|
| 0.01 d | 0.24 h |
| 0.1 d | 2.4 h |
| 1 d | 24 h |
| 2 d | 48 h |
| 5 d | 120 h |
| 10 d | 240 h |
| 20 d | 480 h |
| 50 d | 1,200 h |
| 100 d | 2,400 h |
Frequently asked questions
How many Hour (h) are in one Day (d)?
One Day equals 24 Hour.
How do you convert Day to Hour?
Multiply the Day value by 24 to get the result in Hour.
How do you convert Hour back to Day?
Multiply the Hour value by 0.0416666666666667 to get back to Day.
What is 48 Day in Hour?
48 Day equals 1,152 Hour.
