Hours to Percent Calculator

This tool converts number of hours, minutes and seconds per day into percentage of a Day, Month and Year.



  • Hours
  • Minutes
  • Seconds

The tool will provide the percent.

Note: The default value of one day or 24 hours can be changed to any value



Formula for Percent of a Day, Month or Year

Since a day consists of 24 hours, the calculation determines what fraction of a day is represented by the specified number of hours and then converts that fraction into a percentage.

% of Day = (Hours/24) * 100

The calculation for percent of a month or year is the same as that for a day as both the numerator and denominator are multiplied by the number of days per month or number of days per year.

The calculation can therefore be generalized to percentage of time.

Example Calculation

  • If you work 8 hours a day, that’s 33.33% of the day.
  • If you sleep 7 hours a day, that’s 29.17% of the day.

Related Posts