Decimal Time Converter
Convert decimal time like 1.5 hours to 1 hour 30 minutes. Features bidirectional conversion, real-time calculation, and click-to-copy for work hour tracking and payroll.
Decimal Time Converter
Enter decimal time or HH:MM:SS
for automatic conversion
What is a Decimal Time Converter?
The Decimal Time Converter is an online tool that converts decimal format time like 1.5 hours or 2.75 hours into HH:MM:SS format like 1 hour 30 minutes or 2 hours 45 minutes. It also works in reverse, converting HH:MM:SS to decimal time.
Perfect for work hour tracking, payroll calculations, recipe timing, and exercise logs – quickly convert decimal time without complex mental math.
Common Use Cases
- Work Hour Tracking: Convert 1.75 hours logged in timesheets to 1 hour 45 minutes
- Payroll Calculation: Convert decimal hours to exact minutes for hourly wage calculations
- Cooking/Baking: Convert 0.5 hours in a recipe to 30 minutes
- Exercise Logs: Record 45 minutes 30 seconds as 0.758 hours
- Project Management: Enter work time in decimals and see actual duration
- Study Time: Freely convert study hours between decimal and HH:MM:SS formats
Key Features
- Bidirectional Conversion: Supports both decimal time โ HH:MM:SS and HH:MM:SS โ decimal time
- Decimal Minutes Support: Enter decimal minutes like 2.5 min = 2 min 30 sec
- Real-time Conversion: Results appear instantly as you type
- Click to Copy: Click any result to copy to clipboard
- Quick Examples: One-click common values (1.5 hrs, 0.75 hrs, etc.)
- Formula Display: Shows the calculation process used
How to Use
- Enter Decimal Time: Type your decimal hours/minutes in the top input fields (e.g., 1.5 hours)
- Or Enter HH:MM:SS: Type hours, minutes, and seconds separately (e.g., 1 hr 30 min 0 sec)
- Auto-Convert: The opposite format converts automatically as you type
- View Results: Check various conversion formats in the results panel
- Copy: Click any result value to copy it to your clipboard
Conversion Principles
Decimal Hours โ Minutes:Seconds
The integer part represents hours. Multiply the decimal part by 60 to get minutes.
- 1.5 hours โ 1 hr + (0.5 ร 60 min) = 1 hr 30 min
- 2.75 hours โ 2 hrs + (0.75 ร 60 min) = 2 hrs 45 min
- 0.25 hours โ 0 hrs + (0.25 ร 60 min) = 15 min
HH:MM:SS โ Decimal Hours
Convert everything to seconds, then divide by 3600 to get decimal hours.
- 1 hr 30 min โ (1ร3600 + 30ร60) รท 3600 = 1.5 hours
- 45 min โ 45 รท 60 = 0.75 hours
- 2 hrs 15 min โ (2ร3600 + 15ร60) รท 3600 = 2.25 hours
Frequently Asked Questions
What is decimal time?
Decimal time represents time as a decimal number. For example, 1 hour 30 minutes is 1.5 hours, and 45 minutes is 0.75 hours. It’s commonly used in payroll, timesheets, and project management for easier calculations.
How many minutes is 1.5 hours?
1.5 hours equals 90 minutes (1 hour 30 minutes). Since 0.5 hours ร 60 minutes = 30 minutes, 1 hour + 30 minutes = 90 minutes total.
What is 45 minutes in decimal hours?
45 minutes equals 0.75 hours. The calculation is: 45 minutes รท 60 minutes = 0.75 hours.
Can I convert decimal minutes too?
Yes! For example, entering 2.5 minutes converts to 2 minutes 30 seconds. Multiply the decimal portion of minutes by 60 to get seconds.
How is this useful for payroll?
For hourly wage calculations, converting work time to decimal makes math easier. For example, if you worked 3 hours 45 minutes, convert to 3.75 hours, then multiply by your hourly rate to calculate pay.