Add hours to a time

You can add (or subtract) a number of hours from a time using fractions.
Dates are represented as sequential whole numbers so 1 hour is equivalent to the fraction (1/24).
Times are represented as fractions based on there being 24 hours in a day.
1 Hour is 1/24 = 0.04166
1 Minute is 1/(24*60) = 1/1440
1 Second is 1/(24*60*60) = 1/86400

Example

	A
1	=TODAY() = Wednesday 13 November 2024
2	=NOW() = Wednesday 13 November 2024 19:58:05
3	=A2 + (6*(1/24)) = Thursday, 14 November, 2024 01:58 AM
4	=A2 + TIME(6, 0, 0) = Thursday, 14 November, 2024 01:58 AM
5	=A2 + (8/24) + (15/1440) = Thursday, 14 November, 2024 04:13 AM
6	=A2 + TIME(8, 15, 0) = Thursday, 14 November, 2024 04:13 AM
7	=A2 + (13/24) + (25/1440) , (45/86400) = Thursday, 14 November, 2024 09:23 AM
8	=A2 + TIME(13, 25, 45) = Thursday, 14 November, 2024 09:23 AM

1 - Displays the current date. Custom format "dddd dd mmmm yyyy".
2 - Displays the current date and time. Custom format "dddd dd mmmm yyyy hh:mm:ss".
3 - Displays the current time plus 6 hours.
4 - Displays the current time plus 6 hours using the TIME function to return the correct decimal.
5 - Displays the current time plus 8 hours and 15 minutes.
6 - Displays the current time plus 8 hours and 15 minutes using the TIME function to return the correct decimal.
7 - Displays the current time plus 13 hours, 25 minutes and 45 seconds.
8 - Displays the current time plus 13 hours, 25 minutes and 45 seconds using the TIME function to return the correct decimal.
All these cells have been formatted with the custom number format "dddd, dd mmmm, yyyy hh:mm AM/PM".

Built-in Functions

NOW - The date serial number of the current system date and time.
TIME - The time as a decimal given an hour, minute, second.
TODAY - The date serial number representing today's date.

Related Formulas

Subtract hours from a time
Add minutes to a time
Add seconds to a time