Decimal to Time Calculator
Convert decimal hours to hours and minutes and back — the conversion timesheets and payroll systems need constantly.
Payroll works in decimal hours; people work in hours and minutes.
How the decimal to time calculator works
Payroll works in decimal hours; people work in hours and minutes. 7.75 hours is 7 hours 45 minutes, and 7 hours 30 minutes is 7.5 — but 7 hours 20 minutes is 7.333…, which is where the rounding arguments start.
The conversion is simple: minutes divided by 60. What matters in practice is the rounding convention, because a system rounding to the nearest quarter hour can move a shift by seven minutes in either direction.
Formula: decimal = hours + minutes/60
Worked examples
| Inputs | Result | Note |
|---|---|---|
| 7.75 decimal hours | 7 h 45 min | 7 h 45 min |
| 7 hours 20 minutes | 7.3333 hours | 7.3333 decimal |
| With quarter-hour rounding | 7 h 22 min | rounds to 7.5 |
FAQFrequently asked questions
How do I convert minutes to decimal hours?
Divide by 60. Forty-five minutes is 0.75 hours.
Why does payroll use decimal hours?
Because multiplying by an hourly rate is trivial in decimal and awkward in base 60.
What is 7 hours 20 minutes in decimal?
7.3333 recurring. That non-terminating figure is why rounding conventions exist.
How much does rounding matter?
Quarter-hour rounding can move a shift by up to seven and a half minutes either way. Over a year of daily shifts that is not trivial.
Which rounding is standard?
It varies by jurisdiction and employer. Where it is regulated, rounding must not systematically favor the employer.
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
- US Office of Personnel Management — federal holidays — federal holidays (not applied here)
Last checked: September 2026. The Gregorian calendar rules do not change; working-day counts exclude Saturdays and Sundays only.