Why decimal hours?
Many payroll systems, freelance invoices, and study trackers store time as decimal hours (for example 7.5 h) instead of hours-and-minutes text. Dividing minutes by 60 is the standard way to get that value without rounding error from manual steps.
Formulas
- Hours from minutes: hours = minutes ÷ 60
- Minutes from hours: minutes = hours × 60
Quick reference
| Minutes | Decimal hours | Context |
|---|---|---|
| 15 min | 0.25 h | Quarter hour |
| 30 min | 0.5 h | Half hour |
| 45 min | 0.75 h | Three quarters of an hour |
| 60 min | 1 h | One hour |
| 90 min | 1.5 h | Ninety minutes |
| 120 min | 2 h | Two hours |
Related tools
Use the Seconds to Minutes and Pomodoro Timer links in the strip below when you are chaining smaller intervals into hour blocks.
How do I convert minutes to hours?
Divide by 60. The tool does this as you type so you can paste values straight from a timer or spreadsheet.
How do I convert hours back to minutes?
Multiply decimal hours by 60, or edit the hours field here and read the minutes column.
What is the difference between decimal hours and clock time?
Decimal hours keep one number (for example 1.5). Clock time spells out the leftover minutes (1 h 30 min). Both represent the same duration.
How many minutes are in one hour?
Sixty. That constant is why the conversion is always a simple divide or multiply by 60.