Decimal Hours Converter

About this calculator

This converter turns clock-format time (HH:MM, like 7 hours 30 minutes) into decimal hours (7.5), and back again, by dividing the minutes portion by 60. It's the exact conversion payroll systems expect, since minutes don't divide evenly into a base-10 number without this step — 45 minutes becomes 0.75, not 0.45.

Freelancers and contractors billing by the hour, HR staff processing timesheets, and payroll software that requires decimal input all rely on this conversion to avoid under- or over-paying someone by a few cents per timesheet line. It also works in reverse, turning a decimal figure like 3.25 hours back into 3 hours 15 minutes for a schedule or calendar entry.