Days to Hours Converter

The formula is: hours = days × 24.

Worked example: 4 days is 96 hours.

To go the other way, use the Hours to Days Converter, which divides by 24 instead of multiplying.

A day has exactly 24 hours. The 24 hour division dates back to ancient Egypt, where daylight and darkness were each split into 12 parts, and it is now the standard everywhere.

Two small exceptions are worth knowing. On the day clocks change for daylight saving time, the local day has 23 or 25 hours, and a sidereal day (one rotation of Earth relative to the stars) lasts about 23 hours 56 minutes. Calendar conversions like this one always use 24. Hours are abbreviated h, hr, or hrs, and days as d.

Converting Work Days to Hours

A calendar day always has 24 hours, but a standard work day is usually 8 hours. To turn work days, vacation days, or paid leave into working hours, multiply by the hours in your work day instead: 5 work days at 8 hours is 40 hours, and 10 vacation days is 80 hours.

Common values in days and their equivalents in hours:

Converting days to hours is common when comparing delivery estimates (a 2 day shipping window is 48 hours), tracking time since an event, planning shifts that run across several days, and checking deadlines stated in hours, such as a 72 hour return policy or a 96 hour notice period.

To count the days between two dates, use the Date Difference Calculator. To count only business days, use the Working Days Counter.

Every time converter that shares a unit with this page, starting with the reverse conversion, one page per pair of units, then the converters that show many units at once.

• Hours to Days Converter: 1 day = 24 hours
• Days to Months Converter: 1 month is 30.4375 days on average
• Days to Weeks Converter: 1 week = 7 days
• Days to Years Converter: 1 year is 365.25 days on average
• Minutes to Hours Converter: 1 hour = 60 minutes
• Seconds to Hours Converter: 1 hour = 3,600 seconds
• Hours to Weeks Converter: 1 week = 168 hours
• Hours to Years Converter: 1 year is 8,766 hours on average
• Days to Minutes Converter: 1 day = 1,440 minutes
• Seconds to Days Converter: 1 day = 86,400 seconds
• Day Converter: days to hours, minutes, weeks, fortnights, months and years at once
• Hour Converter: hours to minutes, seconds, days, weeks, months and years at once
• Minute Converter: minutes to hours, seconds, days, weeks and more at once
• Seconds Converter: seconds to milliseconds, nanoseconds, minutes, hours and more at once
• Milliseconds Converter: milliseconds to seconds, minutes, microseconds and more at once
• Time Unit Converter: any amount of time in 13 units, from picoseconds to decades