Decimal to Time Calculator — Convert Hours to HH:MM:SS
Convert decimal hours to hours, minutes, and seconds format. For example, 2.75 hours equals 2 hours and 45 minutes. See also our Time to Decimal Calculator and Time Calculator.
How to Convert Decimal Hours to Time
- Take the whole number part as the hours.
- Multiply the decimal part by 60 to get minutes.
- Take the whole number of that result as minutes.
- Multiply any remaining decimal by 60 to get seconds.
- Combine as HH:MM:SS.
Formula
Hours = floor(decimal_hours)
Minutes = floor((decimal_hours - Hours) x 60)
Seconds = round(((decimal_hours - Hours) x 60 - Minutes) x 60)
Example
Decimal hours: 2.75
Hours = floor(2.75) = 2
Minutes = floor(0.75 x 60) = floor(45) = 45
Seconds = round(0 x 60) = 0
Result: 2:45:00
Decimal to Time Reference Table
| Decimal | Time (HH:MM) | Decimal | Time (HH:MM) |
|---|---|---|---|
| 0.25 | 0:15 | 1.50 | 1:30 |
| 0.50 | 0:30 | 2.00 | 2:00 |
| 0.75 | 0:45 | 2.25 | 2:15 |
| 1.00 | 1:00 | 2.50 | 2:30 |
| 1.25 | 1:15 | 2.75 | 2:45 |
| 1.33 | 1:20 | 3.00 | 3:00 |
| 1.50 | 1:30 | 7.50 | 7:30 |
| 1.75 | 1:45 | 8.00 | 8:00 |
Frequently Asked Questions
Why do timesheets use decimal hours?
Decimal hours make payroll calculations easier since you can multiply directly by hourly rate. For example, 7.5 hours x $20/hr = $150.
What is 0.25 hours in minutes?
0.25 hours equals 15 minutes (0.25 x 60 = 15).
How do I convert 1.67 hours to time?
1.67 hours = 1 hour and 0.67 x 60 = 40.2 minutes, which is 1:40:12 (1 hour, 40 minutes, 12 seconds).
Is 1.5 hours the same as 1 hour 30 minutes?
Yes. 1.5 decimal hours = 1 hour + (0.5 x 60) minutes = 1 hour 30 minutes.
What is the difference between decimal time and standard time?
Standard time uses base-60 (60 minutes per hour, 60 seconds per minute). Decimal time expresses time as a fraction of an hour using base-10.