Hours to Days Converter
Convert hours to days — divide by 24. Results update as you type; exact factors shown.
One hour is 0.0417 days — see the exact factor, not a rounded rule of thumb.
How the hours to days converter works
Time converts through the second. Minutes, hours, days and weeks are exact multiples. A month is taken as the Gregorian average (30.436875 days) and a year as the Gregorian average (365.2425 days = 31,556,952 s); calendar months and leap years vary from these averages.
The UK is metric for most trade and science but keeps miles, pints, stone and mpg (with the imperial gallon) in daily life.
Common time conversions
| From | To | Units |
|---|---|---|
| 6 h | 0.25 d | hours to days |
| 8 h | 0.3333 d | hours to days |
| 12 h | 0.5 d | hours to days |
| 24 h | 1 d | hours to days |
| 36 h | 1.5 d | hours to days |
| 48 h | 2 d | hours to days |
| 72 h | 3 d | hours to days |
| 100 h | 4.1667 d | hours to days |
| 168 h | 7 d | hours to days |
| 240 h | 10 d | hours to days |
| 720 h | 30 d | hours to days |
| 8,760 h | 365 d | hours to days |
Units in this converter and their exact factors
| Unit | Symbol | One unit in seconds |
|---|---|---|
| millisecond | ms | 0.001 second |
| second | s | 1 second |
| minute | min | 60 second |
| hour | h | 3,600 second |
| day | d | 86,400 second |
| week | wk | 604,800 second |
| month (average, 30.4369 days) | mo | 2,629,746 second |
| year (365.2425 days) | yr | 31,556,952 second |
FAQFrequently asked questions about time conversion
How many hours in a day?
24.
What is 100 hours in days?
4.17 days.
How many days is 168 hours?
Exactly 7 — one week.
Does daylight saving change this?
Two clock days a year run 23 or 25 hours, but this conversion uses the nominal 24-hour day.
How many hours in a working week?
38 in Australia, 40 in the US — well under the 168 hours a week actually contains.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Physical Laboratory (NPL) — United Kingdom's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.