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Day to Hour Converter

1 day is exactly 24 hours. Convert days (d) to hours (h) below: type a value and the result updates as you type.

d to h calculator

Dot or comma decimals and scientific notation (1e-3) work.

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Result

Day to Hour conversion

1 d = 24 hone day in hours

1 h ≈ 0.04166666667 done hour in days

Day (d): Exactly 86 400 seconds (24 hours). Leap seconds are not considered.

Hour (h): Exactly 3600 seconds.

Source:SI Brochure, 9th edition (BIPM, 2019)

How to convert days to hours

To convert days to hours, multiply the number of days by 24.

Formula

h = d × 24

Examples

  • 5 d = 5 × 24 = 120 h
  • 25 d = 25 × 24 = 600 h
  • 100 d = 100 × 24 = 2400 h

Day to Hour conversion table

Day to Hour
Day (d)Hour (h)
0.1 d2.4 h
0.5 d12 h
1 d24 h
2 d48 h
3 d72 h
5 d120 h
10 d240 h
20 d480 h
25 d600 h
50 d1200 h
100 d2400 h
250 d6000 h
500 d12000 h
1000 d24000 h

Values rounded to 10 significant digits where needed.

Frequently asked questions

How many hours are in one day?
One day is exactly 24 hours.
How do I convert hours to days?
To convert hours to days, divide the number of hours by 24. The formula is d = h ÷ 24.
Is this conversion exact?
Yes. Both units have exact definitions and the factor 24 is exact. Displayed results are only rounded when they have many decimal places.
Which is larger, a day or a hour?
A day is 24 times larger than a hour. In other words, a hour is exactly 1/24 of a day.