How to Convert Minutes to Decimal Hours
Most payroll systems require time entries in decimal hours rather than hours and minutes. If you clocked in 7 hours and 45 minutes, your timesheet needs to show 7.75 hours, not 7:45. Getting this conversion wrong can lead to incorrect paychecks, so it is important to understand how it works.
Why Decimal Hours Matter for Payroll
Payroll software multiplies hours worked by the hourly rate to calculate pay. That multiplication only works correctly with decimal numbers. If you enter 7:45 as 7.45 instead of 7.75, the math will be wrong and the employee will be underpaid. This is one of the most common payroll errors for businesses that track time manually.
The Conversion Formula
Converting minutes to decimal hours is simple. Divide the number of minutes by 60:
Decimal Hours = Minutes / 60
To convert a full time entry (hours and minutes), keep the hours as they are and add the decimal value of the minutes:
Total Decimal Hours = Hours + (Minutes / 60)
Step-by-Step Examples
Example 1: Convert 8 hours and 20 minutes to decimal hours.
- Divide minutes by 60: 20 / 60 = 0.33
- Add to hours: 8 + 0.33 = 8.33 decimal hours
Example 2: Convert 6 hours and 45 minutes to decimal hours.
- Divide minutes by 60: 45 / 60 = 0.75
- Add to hours: 6 + 0.75 = 6.75 decimal hours
Example 3: Convert 3 hours and 10 minutes to decimal hours.
- Divide minutes by 60: 10 / 60 = 0.17
- Add to hours: 3 + 0.17 = 3.17 decimal hours
Common Conversions Reference Table
| Minutes | Decimal Hours |
|---|---|
| 5 min | 0.08 |
| 10 min | 0.17 |
| 15 min | 0.25 |
| 20 min | 0.33 |
| 25 min | 0.42 |
| 30 min | 0.50 |
| 35 min | 0.58 |
| 40 min | 0.67 |
| 45 min | 0.75 |
| 50 min | 0.83 |
| 55 min | 0.92 |
| 60 min | 1.00 |
Rounding Considerations
Some employers round time to the nearest quarter hour (15 minutes) for payroll purposes. Under the FLSA, rounding is permitted as long as it averages out fairly over time and does not consistently favor the employer. Common rounding increments are 6 minutes (1/10 hour), 15 minutes (1/4 hour), and 5 minutes (1/12 hour). Always check your employer's rounding policy.
Convert Instantly
Skip the manual math. Use our free Decimal Hours Calculator to convert between hours and minutes and decimal hours instantly. It includes a full reference chart and handles both directions of conversion.