How to Convert Time to Decimal Format Converting time to decimal format just involves basic division. There are 24 hours in a day, 60 minutes in an hour and 60 seconds in a minute.

How Do I Change Hours & Minutes Into a Decimal Number in Excel?. In addition to its basic spreadsheet functions, Microsoft Excel also allows writing formulas to perform functions on existing data.

Microsoft Excel also uses fractional days within dates similar to Julian dates but called serial dates. The time of day is stored as a decimal fraction of the 24 hours clock starting from midnight.