Divide minutes by 60, then add the whole hours. Eight hours and 45 minutes is 8.75 hours, not 8.45.
The conversion rule
Clock notation has sixty minutes in an hour. Decimal notation divides the same hour into hundredths. Convert only the minute component: 7 hours 18 minutes becomes 7 + 18/60 = 7.30 hours. A decimal point is not interchangeable with a colon.
A timecard example
Suppose three shifts are 7:45, 8:20 and 6:55 after unpaid breaks. Add the minutes first: 465 + 500 + 415 = 1,380 minutes. Divide by 60 to get 23 hours. Rounding each shift prematurely can create small payroll differences across a larger team.
Convert back to clock time
Take the whole-number portion as hours. Multiply the fractional portion by 60 for minutes. For 8.6 hours, 0.6 × 60 = 36, so the result is 8:36. Round once at the precision required by your system.
Try it with your numbers
Add clock-in and clock-out times, subtract breaks, and see regular and overtime hours.
8 + 15/60 = 8.25 hours. At $24 per hour, that duration corresponds to $198 before any premium or deduction.
Should I round each shift before adding it?
For an arithmetic cross-check, retain minutes or full precision until totaling. Then compare the result with the actual rounding policy; repeatedly rounding intermediate values can change the total.
What is the quickest way to catch a mistaken decimal?
Convert the decimal portion back into minutes by multiplying it by 60. If 7.30 was meant to represent 7:30, the check reveals 18 minutes rather than 30.
The conversion describes a duration. It does not decide whether clock punches should be rounded. Apply an employer's lawful timekeeping policy separately and retain the original entries for reconciliation.
How to calculate work hours in decimals
First calculate each duration in minutes after subtracting unpaid breaks. Add the durations, divide total minutes by 60, and round only where the receiving payroll or billing system requires it. For example, 41 hours 15 minutes is 41 + 15 ÷ 60 = 41.25 hours.
If a timesheet contains many rows, converting and rounding every row before totaling can create a different result. Intious totals the underlying values first and shows the row-level conversion so the difference can be checked.
Questions people ask about decimal work hours
How do I calculate work hours in decimals?
Divide the minute portion by 60 and add the whole hours. Eight hours 45 minutes is 8 + 45 ÷ 60 = 8.75 hours.
What is 0.80 of an hour?
It is 48 minutes because 0.80 × 60 = 48.
Does 30 minutes equal .50 in payroll hours?
Yes. Thirty minutes is half an hour, so 30 ÷ 60 = 0.50.
What is 0.10 of an hour?
It is 6 minutes, not 10 minutes. Multiply the decimal fraction by 60.
Convert Minutes and Excel Times to Decimal Hours — Divide a number of minutes by 60. For an Excel cell containing a genuine time duration stored as a fraction of a day, multiply its value by 24.
Why Decimal Hours Totals Differ After Rounding — Rounding each timesheet row can produce a different total from adding the original durations and rounding once. Compare the two methods before investigating missing time.