⏱️ Time to Decimal Calculator
Payroll does not speak in hours and minutes — it speaks in decimals. A shift of 7 hours 30 minutes is paid as 7.5 hours, and doing that conversion by hand for a whole timesheet is slow and error-prone.
Use the first card to turn any hours : minutes : seconds into decimal hours, decimal minutes and total seconds, with the 2-decimal payroll rounding shown separately. Use the second card to go the other way — decimal hours from a payroll report back into hours, minutes and seconds.
How to use this calculator
Pick the direction you need, enter the time, then press Calculate.
- For a timesheet entry, enter hours, minutes and seconds in the first card.
- Read the decimal hours — that is the figure payroll multiplies by the hourly rate.
- To check a payroll figure instead, enter decimal hours in the second card.
- Read it back as hours : minutes : seconds to compare with your clock times.
Why Timesheets Use Decimal Time
Minutes are sixtieths of an hour, not hundredths, so 30 minutes is 0.5 of an hour but 45 minutes is 0.75 — the conversions are not intuitive, which is exactly why payroll systems store decimal hours: pay becomes one multiplication (decimal hours × rate) instead of clock arithmetic on every line.
Two conventions are worth knowing. Many employers round to the nearest 6 minutes, which is 0.1 of an hour, so times move in tidy tenths. Others round the final decimal to 2 places. Small rounding differences are normal and legal in most workplaces as long as the rule is applied consistently — but if your payslip is out by whole hours, that is a mistake worth raising, and this calculator lets you check it in seconds.
Frequently asked questions
How do I convert minutes to decimal hours?
Divide the minutes by 60. So 30 minutes = 0.5, 15 minutes = 0.25, 45 minutes = 0.75 and 20 minutes = 0.3333. Add the result to the whole hours.
What is 7 hours 45 minutes in decimal?
7.75 hours — 45 minutes is 45 ÷ 60 = 0.75 of an hour.
Why does my payslip show 7.5 hours when I worked 7:30?
It is the same amount of time written the payroll way: 30 minutes is half an hour, so 7:30 is stored and paid as 7.5 hours. Multiply 7.5 by your hourly rate to check the gross pay for that shift.
How do I convert decimal hours back to minutes?
Multiply the decimal part by 60. For example 0.75 of an hour is 0.75 × 60 = 45 minutes, so 6.75 hours is 6 hours 45 minutes. The second card on this page does it for you, including seconds.