Hours to Decimal Converter
Convert standard clock hours and minutes into exact decimal hours for payroll software, invoicing, and timesheets. Enter any duration to calculate its accurate base-10 hourly equivalent ready for QuickBooks, ADP, Gusto, or Excel.
Result
0.00 hrs
Converting clock hours and minutes into decimal format is mandatory for any wage calculation because payroll software cannot multiply currency rates by base-60 minutes directly. For example, an employee logging 7 hours and 45 minutes who is billed at $20.00 per hour must be paid based on 7.75 hours ($20.00 × 7.75 = $155.00), not 7.45. Entering 7.45 produces $149.00, shorting the employee by $6.00 for that single shift. This converter eliminates conversion errors by calculating exact base-10 fractions (minutes divided by 60) with instant support for statutory 15-minute FLSA rounding and 6-minute billing increments. If you only need to convert minutes, use our minutes to decimal converter, or see our full conversion guide.
⚡ Watch out: repeating decimals in manual payroll entry
7 hours 20 minutes converts to 7.3333... decimal hours. Most payroll clerks round this to 7.33 for manual entry — which is correct for a single shift. The problem appears when you add multiple rounded entries: four shifts of 7.33 sum to 29.32, not 29.33 (the true 29⅓). Payroll platforms like ADP and Workday store the unrounded value internally and round only the final gross pay figure — so let the software calculate, and only use the rounded value for paper records.
Common Hours to Decimal Conversions
| Time (Hours & Minutes) | Decimal Hours | Description |
|---|---|---|
| 0 hrs 15 mins | 0.25 hrs | Quarter-hour |
| 0 hrs 30 mins | 0.50 hrs | Half-hour |
| 0 hrs 45 mins | 0.75 hrs | Three-quarter hour |
| 1 hr 15 mins | 1.25 hrs | Standard quarter increment |
| 1 hr 30 mins | 1.50 hrs | Standard half increment |
| 2 hrs 45 mins | 2.75 hrs | Standard three-quarter increment |
| 4 hrs 20 mins | 4.33 hrs | Common shift increment (recurring) |
| 7 hrs 30 mins | 7.50 hrs | Standard 7.5-hour workday |
| 8 hrs 15 mins | 8.25 hrs | Full shift with slight overtime |
| 8 hrs 45 mins | 8.75 hrs | Full shift with overtime |
Frequently Asked Questions
What is the formula to convert hours and minutes to decimal hours?
The universal conversion formula is: Decimal Hours = Hours + (Minutes ÷ 60) + (Seconds ÷ 3600). For example, to convert 4 hours, 20 minutes, and 15 seconds: divide 20 by 60 (0.3333), divide 15 by 3600 (0.0042), and add both to 4, yielding 4.3375 decimal hours.
Why is 8 hours and 15 minutes not 8.15 decimal hours?
Hours are based on 60 minutes, not 100. 15 minutes represents 15/60, which equals 0.25 hours. Entering 8.15 into payroll underpays the worker by 6 minutes, because 0.15 decimal hours is actually only 9 minutes (0.15 × 60 = 9).
How should I round decimal hours for payroll purposes?
Standard accounting practices round decimal hours to two decimal places (the hundredths place), such as 7.83 hours. However, time clock hardware often applies specific punch rounding beforehand, such as the FLSA 7/8-minute rule rounding to the nearest quarter-hour (0.25).
What is 30 minutes in decimal hours?
30 minutes is exactly 0.50 decimal hours because 30 divided by 60 equals 0.5.
What is 1 hour and 45 minutes in decimal hours?
1 hour and 45 minutes equals 1.75 decimal hours (1 whole hour plus 45/60 hours).