Decimal Hours Calculator
Convert between HH:MM and decimal hours. Pick the direction that matches your input.
Conversion result
Worked examples
- 8 hours 30 minutes equals 8.50 decimal hours.
- 8 hours 45 minutes equals 8.75 decimal hours.
- 7 hours 15 minutes equals 7.25 decimal hours.
- 8.50 decimal hours equals 8 hours 30 minutes.
- 1.10 decimal hours equals 1 hour 6 minutes.
Frequently asked questions
How do I convert 8 hours 30 minutes to decimal hours?
Divide the minutes by 60: 30 / 60 = 0.5. So 8 hours 30 minutes equals 8.50 decimal hours.
How do I convert 8.75 decimal hours back to HH:MM?
The whole number is the hours. Multiply the decimal by 60 to get the minutes: 0.75 × 60 = 45. So 8.75 equals 8 hours 45 minutes.
Why use decimal hours at all?
Decimal hours are common in payroll, timesheets, and billing systems because they are easier to multiply by an hourly rate.
Does this support negative or zero values?
Zero is supported. Negative values are not, because a duration cannot be negative.