Date & Time Calculators
Decimal Time Converter
Convert between HH:MM:SS clock time and decimal hours for payroll and timesheets.
Free foreverRuns in your browserNo sign-up
Decimal hours
1.5000
1.5000
Decimal hours
90.00
Decimal minutes
5,400
Total seconds
About the Decimal Time Converter
The Decimal Time Converter turns clock time in hours, minutes and seconds into decimal hours, and converts decimal hours back into a clock time. For example, 1 hour 30 minutes equals 1.5 decimal hours.
Payroll systems, billing software and spreadsheets usually expect decimal hours rather than minutes, so this conversion removes a common source of timesheet errors.
Both directions run instantly in the browser and also show the value in decimal minutes and total seconds for cross-checking.
Key features
- Clock time to decimal hours conversion
- Decimal hours back to HH:MM:SS
- Decimal minutes and total seconds shown
- Ideal for payroll and timesheets
How to use
- 1Choose the conversion direction.
- 2Enter a clock time or a decimal number of hours.
- 3Read the converted value and the extra decimal-minute and second totals.
Examples
Clock to decimal
Input:
01:30:00Output:
1.5 hours30 minutes is half an hour, so 1 hour 30 minutes is 1.5 decimal hours.
Decimal to clock
Input:
2.25 hoursOutput:
02:15:000.25 of an hour is 15 minutes, giving 2 hours 15 minutes.
Frequently asked questions
- How do I convert 45 minutes to decimal?
- Divide the minutes by 60. 45 minutes is 45 divided by 60, which is 0.75 decimal hours.
- Why does payroll use decimal hours?
- Multiplying a pay rate by decimal hours is straightforward, whereas mixing hours and minutes needs extra conversion steps and is error prone.
- Does the converter handle seconds?
- Yes. Seconds are included in the conversion and contribute to the decimal value, and the result can be read back as HH:MM:SS.