Hours to Days Converter
Convert hours to days and back. Enter a number of hours to get calendar days (24 hours each) and equivalent 8-hour working days, or flip the direction to turn days into hours.
Example: with Amount 48 · Direction Hours → days → Converted amount: 2 days.
- In whole units2 d 0 h
- Also equals6 working days (8 h each)
Computed by the calculator below using its default values. Change any input to see your own numbers.
1 day = 24 hours exactly. A standard 8-hour shift means 3 working days fit in one 24-hour calendar day.
Hours to days, two ways
Dividing hours by 24 gives calendar days: a full 24-hour day includes sleep and everything else. That is the right unit for questions like how many days a 72-hour road trip covers.
For work and billing, the useful unit is an 8-hour working day, so this tool also divides hours by 8. Forty hours is five working days but only about 1.67 calendar days — the same total, counted two different ways.
How it’s calculated
Calendar days = hours / 24 (1 day = 24 hours, exact). Working days = hours / 8, using a standard 8-hour shift. Reverse mode multiplies days by 24. Minutes shown use 1 hour = 60 minutes.
A working day is assumed to be 8 hours; your shift length may differ. Calendar days here are fixed 24-hour spans and ignore time-zone or daylight-saving shifts.
Hours to days quick reference
| Hours | Calendar days | Working days (8 h) |
|---|---|---|
| 8 h | 0.33 day | 1 day |
| 24 h | 1 day | 3 days |
| 40 h | 1.67 days | 5 days |
| 48 h | 2 days | 6 days |
| 72 h | 3 days | 9 days |
| 100 h | 4.17 days | 12.5 days |
| 168 h | 7 days | 21 days |
Computed with 1 day = 24 hours and an 8-hour working day.
Common mistakes
- Mixing calendar days and working days — 40 hours is five 8-hour days but only 1.67 full 24-hour days.
- Rounding 25 hours to 1 day; it is 1.04 days, or 1 day and 1 hour.
- Assuming a workday is 24 hours when estimating project effort — divide by 8, not 24.
Frequently asked questions
How do I convert hours to days?
Divide the number of hours by 24, because one day is exactly 24 hours. For example, 60 hours / 24 = 2.5 days.
How many working days is a number of hours?
Divide by 8 for a standard 8-hour shift. So 40 hours is 5 working days, even though it is only about 1.67 calendar days.
How many hours are in a day?
Exactly 24. Switch this tool to Days → hours and enter 1 to confirm, or enter any number of days to multiply by 24.
Why does 40 hours show as both 5 days and 1.67 days?
Those are two different units: 5 eight-hour working days versus 1.67 twenty-four-hour calendar days. Both describe the same 40 hours.