days to hours

d = ? hr

This converter makes instant conversions from days to hours as time duration. To use the converter, please provide a value in the input field. The converter will begin making conversions as the values are being typed in. To add or subtract time from a date, please use our date calculator. To add, subtract, multiply, and divide time, please use our time calculator. To calculate the time between two dates, please use our days calculator.

How many hours in a day?

ISO 8601 is an international standard covering the worldwide exchange and communication of date and time-related data. ISO 8601 uses the 24-hour clock system, which means there are 24 hours in a day, 60 minutes in an hour, and 60 seconds in a minute. Based on this standard, there are exactly 24 hours in a day.

How to convert days to hours

Based on the definition of 24 hours in a day, the day to hour conversion formula is:

hour = 24 × day

Thus, to convert from days to hours, multiply a value in days by 24. For example, convert 5 days to hours:

5 d = 5 × 24 hr = 120 hr

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