UnitConHours to Days Converter
Convert hours to days for project scheduling, travel duration, and interpreting long-time intervals. Scientific half-lives, delivery estimates, and battery run times are often given in hours that need to be understood in days.
Formula
Divide hours by 24 to get days. To reverse, multiply days by 24 to get hours.
Quick reference
| Hour (h) | Day (d) |
|---|---|
| 1 | 0.04166667 |
| 6 | 0.25 |
| 12 | 0.5 |
| 24 | 1 |
| 36 | 1.5 |
| 48 | 2 |
| 72 | 3 |
| 120 | 5 |
| 168 | 7 |
| 240 | 10 |
About these units
Hour
The 24-hour day was established by ancient Egyptians, who divided the day and night into 12 hours each. The unequal seasonal hours of antiquity were standardized into equal hours in the 14th century with mechanical clocks.
Day
The day (86,400 seconds) is one of the oldest time units, tied to Earth's rotation. It is the basis for civil timekeeping and remains the fundamental unit for scheduling and calendar systems worldwide.