Convert days to hours
Days to hours. Enter a value to convert, or use the days to hours chart further down the page.
1 day equals 24 hours. Going the other way, 1 hour = 0.04166666667 days.
Note. Months and years are not fixed lengths. This converter uses the average Gregorian year of 365.2425 days and the average month of one twelfth of that.
How to convert days to hours
To convert days to hours, multiply the day value by 24. You can also divide by 0.04166666667 to get the same answer.
h = d × 24
Worked example
Convert 30 d to hours:
30 d = 720 h
days to hours conversion chart
Use this days to hours table for quick reference without typing anything.
| days (d) | hours (h) |
|---|---|
| 1 d | 24 h |
| 2 d | 48 h |
| 5 d | 120 h |
| 10 d | 240 h |
| 15 d | 360 h |
| 30 d | 720 h |
| 45 d | 1,080 h |
| 60 d | 1,440 h |
| 100 d | 2,400 h |
| 1,000 d | 24,000 h |
What is a day?
A day is exactly 86,400 seconds by definition. The Earth’s actual rotation drifts slightly from this, which is what leap seconds correct.
What is a hour?
An hour is 60 minutes, or exactly 3,600 seconds — one twenty-fourth of a mean solar day.
Frequently asked questions
How many hours are in a day?
1 days equals 24 hours. Going the other way, 1 hours is 0.04166666667 days.
How do you convert days to hours?
To convert days to hours, multiply the day value by 24. You can also divide by 0.04166666667 to get the same answer.
What is 10 days in hours?
10 days equals 240 hours. The conversion chart on this page lists the other values people look up most often.
Related time conversions
Convert days to other units
- hours to days
- days to seconds
- days to minutes
- days to weeks
- days to months
- days to years
- days to milliseconds
Convert other units to hours
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