To know how many hours in a month. Simply take the number of days in a month and multiply it by 24 hours to have the number of hours in the month. As an illustration, there are 720 hours in a 30-day month and 744 hours in a 31-day month. A 28-day year includes around 672 hours in February, and a leap year has 696 hours. This computation can be applicable in estimating payroll, projects, and time management.