Hour Calculator

An hour calculator sums two time values expressed in hours and minutes into a single combined total. It is the tool you reach for when a timesheet lists multiple segments — say 6 hours 30 minutes and 4 hours 15 minutes — and you need one grand total rather than a clock time.

The arithmetic is straightforward in principle but fiddly in practice: convert each value to total minutes, add them, then convert back to HH:MM by dividing by 60 for hours and taking the remainder for minutes. The 60-minute carry is where most manual errors creep in, especially when the minutes column adds to more than 60.

This calculator also reports the decimal-hours total, which is what payroll, billing, and project-tracking systems expect when they multiply hours by a rate. So 6:30 plus 4:15 returns 10:45 and 10.75 decimal hours in one step.