Time to Decimal (Decimal Time) Converter
Convert time (hh:mm:ss) to decimal hours (and back) with rounding options for timesheets. A time-to-decimal converter turns hh:mm(:ss) into decimal hours (and vice versa). This is commonly used for timesheets, invoicing, and payroll systems that expect decimal hours.
Input
Decimal hours
1.50
Formula: hours + minutes/60 + seconds/3600
How to use it
- Enter a time value (hours and minutes).
- Choose the precision/rounding you need.
- Copy the decimal hours result.
- Use reverse conversion when you need hh:mm output.
Key formulas
- Time to decimal
- Decimal hours = hours + minutes/60 + seconds/3600
FAQ
Because 20 minutes is one-third of an hour. 1:20 equals 1.333… hours, not 1.20.
Divide minutes by 60. For example, 15 minutes = 0.25 hours, 30 minutes = 0.5 hours, 45 minutes = 0.75 hours.
Use whatever your payroll system requires (often 2 decimals) and follow your company’s rounding policy. Some systems round to quarter-hours (0.25).
Yes—enter decimal hours and convert back to hours and minutes.
Decimal hours make billing and payroll math easier (hours × rate). Converting from hh:mm prevents mistakes when adding time manually.
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Disclaimer
Follow your employer’s rounding and timekeeping policy for official reporting. This tool converts time formats but doesn’t define payroll rules.