Industrial Hours Converter
Convert standard time (hours and minutes) to industrial (decimal) hours and back. Minutes can be entered without limit (e.g., 90 minutes).
You can enter any number of minutes, including values above 59.
The values convert automatically.
Examples:
- 0 hours 112 minutes → allowed
- 5 hours 90 minutes → allowed
- 350 minutes → allowed
Standard Time
Industrial Hours
Total Time Calculator
Enter several time values at once. You can add as many lines as you need.
How this industrial hours converter works
This tool converts between standard time (hours and minutes) and industrial hours (decimal time). People commonly search for this as “convert time to decimal hours”, “decimal hours calculator”, or “hours and minutes to decimal” when filling out timesheets, payroll systems, or invoices.
You can convert in both directions: enter hours and minutes to get decimal hours, or enter decimal hours to get a standard HH:MM time display. In the total time calculator, you can add multiple time entries and get a combined total in both format.
What are industrial hours?
Industrial hours (decimal hours) represent time as a decimal number instead of hours and minutes.
Conversion formulas
Standard → Industrial:
Example: 2 hours 30 minutes
→ 2 + 30 60 = 2.5
Industrial → Standard:
1. Take the integer part of the decimal hours → this is the hours.
2. Take the decimal part and multiply it by 60 → this is the minutes.
Example: 2.75 hours
→ 2 hours and 0.75 × 60 = 45 minutes.
Common use cases
- Payroll calculation: How do I convert hours and minutes into decimal hours for payroll?
- Project time tracking: How can I convert tracked work time into decimal hours for a timesheet?
- Manufacturing efficiency: How do I convert machine runtime into decimal hours for production reports?
- Service business scheduling: How do I convert technician work time into decimal hours for invoicing?
Conversion Reference
Common 5-minute conversions and hours up to an 8-hour workday.
| Minutes | Decimal | Hours | Decimal |
|---|---|---|---|
| 5 min | 0.08 | 1 h | 1.00 |
| 10 min | 0.17 | 2 h | 2.00 |
| 15 min | 0.25 | 3 h | 3.00 |
| 20 min | 0.33 | 4 h | 4.00 |
| 25 min | 0.42 | 5 h | 5.00 |
| 30 min | 0.50 | 6 h | 6.00 |
| 35 min | 0.58 | 7 h | 7.00 |
| 40 min | 0.67 | 8 h | 8.00 |
| 45 min | 0.75 | ||
| 50 min | 0.83 | ||
| 55 min | 0.92 | ||
| 60 min | 1.00 |
Related Calculators
If you want to calculate your worked hours first (time in, time out, breaks), use the Work Hours Calculator. It totals your daily and weekly time and is useful for timesheets and shift tracking.
To convert your pay across time periods, try the Salary Calculator. It helps you compare hourly, weekly, monthly, and yearly pay using a work schedule.
If your calculations also involve percentages for raises, increases, or comparisons, you may also like the Percentage Calculator.
FAQ
What are industrial hours (decimal hours)?
Industrial hours, also called decimal hours, represent time as a single decimal number instead of hours and minutes. This is common for payroll, timesheets, and billing.
How do I convert HH:MM to decimal hours?
Divide the minutes by 60 and add the result to the hours. Example: 2:30 becomes 2 + (30/60) = 2.5.
How do I convert decimal hours back to hours and minutes?
Take the whole number as hours. Multiply the decimal part by 60 to get minutes. Example: 2.75 hours becomes 2 hours and 0.75×60 = 45 minutes.
Can I enter minutes above 59?
Yes. You can enter any number of minutes (for example 112 or 350). The converter will normalize and calculate the correct total automatically.
Why do payroll systems use decimal hours?
Decimal hours make multiplying time by an hourly rate straightforward. For example, 7.5 hours × $20 is easier than working with 7:30.