Days to hours
One d equals 24 h. Type any number and the answer appears as you type — the maths happens in your browser.
Result
The same value in every unit
| Unit | Value |
|---|
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Common values
| days | hours |
|---|---|
| 1 d | 24 h |
| 2 d | 48 h |
| 3 d | 72 h |
| 5 d | 120 h |
| 10 d | 240 h |
| 15 d | 360 h |
| 20 d | 480 h |
| 25 d | 600 h |
| 50 d | 1200 h |
| 100 d | 2400 h |
| 500 d | 12000 h |
| 1000 d | 24000 h |
How to use
- Enter the number of days in the field.
- The result in hours updates on every keystroke.
- Use the table below for the values people look up most often.
Formula and reverse conversion
The formula
To convert by hand: h = d × 24. Going back the other way, one h is 0.04166666667 d.
How long a month and a year are here
A month here is the average Gregorian month, 30.44 days, and a year is 365.2425 days. That is the right basis for questions like “how many hours in three months”, but not for a specific calendar month.
h = d × 24
Frequently asked questions
How many hours are in one days?
One d is 24 h.
How do I convert days to hours?
Multiply by the factor: h = d × 24.
Is the result exact?
The factors are the exact legal definitions, and up to ten significant digits are kept in the answer. Rounding happens only in the display.
How do I convert hours back to days?
One h is 0.04166666667 d — or open the reverse page linked below.