Time to Decimal Calculator
Convert hours and minutes into decimal hours for a timesheet — and back again.
Payroll runs on decimal hours, not clock time.
How the time to decimal calculator works
Payroll runs on decimal hours, not clock time. Seven hours and forty-five minutes is 7.75 hours, not 7.45 — and that single confusion is behind a great many timesheet disputes, because typing 7.45 underpays by eighteen minutes.
The conversion is just minutes divided by sixty. The quarter-hours are worth memorising: 15 minutes is 0.25, 30 is 0.5, 45 is 0.75. Ten minutes is 0.1667, which is why anything not on a quarter hour looks untidy.
Enter hours and minutes to get decimal, or switch direction to turn a decimal figure back into hours and minutes.
Formula: decimal hours = hours + minutes/60 + seconds/3600
Worked examples
| Inputs | Result | Note |
|---|---|---|
| 7 hours 45 minutes | 7.75 | 7.75 decimal hours |
| 7.75 back to the clock | 7 h 45 min | 7 h 45 min |
| Ten minutes | 0.166667 | 0.1667 hours |
FAQFrequently asked questions
What is 7 hours 45 minutes in decimal?
7.75 hours. Divide the minutes by 60: 45 ÷ 60 = 0.75.
Why is it not 7.45?
Because minutes run to 60, not 100. Writing 7.45 on a timesheet claims 7 hours 27 minutes and underpays by eighteen.
What is 10 minutes in decimal hours?
0.1667 — a sixth of an hour.
What are the quarter hours?
15 min = 0.25, 30 min = 0.5, 45 min = 0.75. Those three cover most timesheets.
How do I convert decimal back to minutes?
Multiply the fractional part by 60: 0.4 hours is 24 minutes.
Where these figures come from
- ISO 8601 — Date and time — Representations for information interchange — the yyyy-mm-dd format and the week-numbering rules used here
- US Naval Observatory — Calendars — the Gregorian leap-year rule
- Australian Government — public holidays — public holidays by state (not applied here)
Last checked: September 2026. The Gregorian calendar rules do not change; working-day counts exclude Saturdays and Sundays only.