Time to Decimal Calculator
Most payroll systems and timesheets want hours expressed as a decimal — 7 hours 30 minutes becomes 7.50. Use the converters below for fast, accurate two-way conversion between hours:minutes and decimal hours.
Hours & Minutes → Decimal
Decimal Result
Decimal → Hours & Minutes
Time Result
Common Conversions
| Time (h:mm) | Decimal | Time (h:mm) | Decimal |
|---|---|---|---|
| 0:05 | 0.083 | 0:35 | 0.583 |
| 0:10 | 0.167 | 0:40 | 0.667 |
| 0:15 | 0.25 | 0:45 | 0.75 |
| 0:20 | 0.333 | 0:50 | 0.833 |
| 0:25 | 0.417 | 0:55 | 0.917 |
| 0:30 | 0.50 | 1:00 | 1.00 |
How the Math Works
An hour has 60 minutes, not 100, so minutes don't translate directly to decimals. To convert minutes to a decimal, divide by 60: 15 ÷ 60 = 0.25, 30 ÷ 60 = 0.50, 45 ÷ 60 = 0.75. Add that to the whole hours to get total decimal hours.
Going the other way: take the decimal portion, multiply by 60, and round to the nearest minute. So 0.4 × 60 = 24 minutes, meaning 7.4 hours = 7 hours 24 minutes.
Why Payroll Uses Decimals
Pay rates are decimals (e.g., $22.50 per hour), so total pay is easier to compute when hours are decimals too: rate × hours = pay. If you logged hours as 7:30, payroll software would have to convert before multiplying — many systems just ask you to enter the decimal directly to avoid mistakes.