Hours to days●
Hours in. Days out. Measure long waits and deadlines.
Time
Fixed durations: 1 h = 60 min. 1 day = 24 h. Months, years and time zones need calendar dates.
Definitions: BIPM SI Brochure ↗Use a decimal point, for example 2.54. Scientific notation works too: 1e3.
Try a value
Pick an example to startThe formula
days (24 hours) = hours ÷ 24
Divide the number of hours by 24 to get days (24 hours). To go the other way, multiply by the same number.
A worked example
For 72 h, divide 72 by 24. The result is approximately 3 d.
72 ÷ 24 ≈ 3 d
Quick reference
Reference values are rounded to 6 decimal places. Use the converter above for other values or precision.
| Hours (h) | Days (24 hours) (d) |
|---|---|
| 6 | 0.25 |
| 12 | 0.5 |
| 24 | 1 |
| 36 | 1.5 |
| 48 | 2 |
| 72 | 3 |
| 96 | 4 |
| 168 | 7 |
| 720 | 30 |
All equivalent units
The same value, in every supported unit.
Time conversions
For deadlines and delivery times.
Use this conversion for delivery estimates, notice periods and long waits. Divide hours by 24. Remember that clock changes can make a real day 23 or 25 hours, but this converter uses a fixed 24 hours.
Calculation details & precision
Time conversions use seconds as the base unit. A minute is 60 seconds, an hour is 3,600 seconds and a day here is a fixed interval of 86,400 seconds. A week is 7 such days; a fortnight is 14 days. Calendar months, years and time-zone changes are not part of these calculations.
Automatic displays up to 12 significant digits. Choose 2, 4 or 6 decimal places in Precision for a shorter result. Displayed results are rounded; very large or small values use scientific notation.
Common questions
How many days is 48 hours?
48 hours is exactly 2 days.
How many days (24 hours) are in 72 hours?
72 h is approximately 3 d. The converter can show more significant digits or round to a chosen number of decimal places.