Do not read minutes as decimals
8:30 is eight hours 30 minutes, which equals 8.50 hours. Writing 8.30 hours means eight hours plus 0.30 of an hour—only 18 minutes.
Convert Work Time Into Decimal Hours
Enter one or more shifts to see both readable hours and the decimal-hours total commonly used on timesheets.
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Useful guidance
Convert minutes to decimal hours correctly
Decimal time is calculated by dividing minutes by 60. That means 15 minutes is 0.25 hours, 30 minutes is 0.50 and 45 minutes is 0.75—not 0.15, 0.30 or 0.45.
15 minutes15 ÷ 600.25 hours
45 minutes45 ÷ 600.75 hours
7 hr 45 min7 + (45 ÷ 60)7.75 hours
Convert hours and minutes into decimal hours correctly
Decimal hours divide an hour into hundredths; ordinary clock time divides it into 60 minutes. Convert the minutes by dividing by 60, then add the whole hours. For example, 7 hours 45 minutes becomes 7 + 45 ÷ 60 = 7.75 hours.
| Minutes | Exact fraction | Decimal hour |
|---|---|---|
| 5 | 5 ÷ 60 | 0.0833… |
| 10 | 10 ÷ 60 | 0.1667… |
| 15 | 15 ÷ 60 | 0.25 |
| 20 | 20 ÷ 60 | 0.3333… |
| 30 | 30 ÷ 60 | 0.50 |
| 45 | 45 ÷ 60 | 0.75 |
Round at the correct stage
Adding rounded decimal values for every shift can differ from adding exact minutes first. Unless a policy says otherwise, total the minutes and round only the final decimal result.
Know the display precision
Two decimal places are convenient but not always exact. One minute is 0.0166… hour, so a displayed 0.02 is rounded. Keep the hours-and-minutes value for checking.
Example weekly conversion
Three shifts of 7 hr 45 min, 8 hr 10 min and 6 hr 35 min total 1,350 minutes. That is exactly 22 hr 30 min, or 22.50 decimal hours. Converting each line only after its net minutes are known avoids base-60 errors.