Hours to Days converter
There are 24 hours in a day. Use this hours to days converter to change h to d instantly, see the formula, and check quick examples for common time spans.
Converter tool
Formula: d = h ÷ 24
Quick examples
| Hours | Days |
|---|---|
| 12 | 0.5 |
| 24 | 1.0 |
| 36 | 1.5 |
| 48 | 2.0 |
| 72 | 3.0 |
| 96 | 4.0 |
| 120 | 5.0 |
| 168 | 7.0 |
How to convert Hours to Days
Formula: d = h ÷ 24.
Reverse conversion: h = d × 24.
Example: 72 hours ÷ 24 = 3 days.
Tip: Type a value in either field and use the swap button to reverse the calculation instantly.
Understanding hours and days
Hours and days are closely related time units. One day is defined as exactly 24 hours, based on the rotation of the Earth. This fixed ratio makes it easy to convert between long periods of hours and whole or fractional days.
To convert hours to days, divide the number of hours by 24. For example, 36 hours ÷ 24 = 1.5 days. To go the other way, multiply days by 24 to get hours. For example, 2.5 days × 24 = 60 hours.
This calculator handles both directions automatically and uses sensible rounding, which is handy for project planning, travel, work scheduling, or tracking long events.
Related converters
Hours → Days FAQs
What definitions are used?
Exact: 1 min = 60 s; 1 h = 60 min; 1 d = 24 h; 1 wk = 7 d. For years we use 365 d = 1 yr.
How do I convert days back to hours?
Use h = d × 24.
How many days is 72 hours?
72 hours is 3 days, because 72 ÷ 24 = 3.
Are the results rounded?
Calculations use exact constants; values are displayed with sensible rounding for readability.