Minutes to Decimal Calculator
Convert Time to Decimal Hours for Payroll & Timesheets
Based on U.S. Dept. of Labor & OPM time standards
Convert Minutes to Decimal Hours
15 min = 0.25 | 30 min = 0.50 | 45 min = 0.75
Convert Decimal Hours to Minutes
0.25 = 15 min | 0.50 = 30 min | 0.75 = 45 min
Convert HH:MM to Decimal Hours
8 hours 30 minutes = 8.50 decimal hours
How Minutes to Decimal Conversion Works
⏱️ Why Convert to Decimal?
Many payroll systems, timesheets, and billing software require time in decimal format rather than hours:minutes. For example, 1 hour 30 minutes is entered as 1.50 hours, not 1:30. This makes mathematical calculations easier — you can simply add, multiply, and calculate wages without converting back and forth.
- Identify the Minutes: Determine the minutes portion of your time entry (e.g., 45 minutes).
- Divide by 60: Since there are 60 minutes in an hour, divide minutes by 60 (45 ÷ 60 = 0.75).
- Add to Hours: Add the decimal result to the whole hours (1 hour + 0.75 = 1.75 hours).
- Round if Needed: Round to 2 decimal places for most payroll systems.
Conversion Formulas
Minutes to Decimal Hours
Decimal Hours to Minutes
HH:MM to Decimal Hours
Decimal to HH:MM Format
Minutes to Decimal Conversion Chart
| Minutes | Decimal | Minutes | Decimal | Minutes | Decimal |
|---|---|---|---|---|---|
| 1 | 0.02 | 21 | 0.35 | 41 | 0.68 |
| 2 | 0.03 | 22 | 0.37 | 42 | 0.70 |
| 3 | 0.05 | 23 | 0.38 | 43 | 0.72 |
| 4 | 0.07 | 24 | 0.40 | 44 | 0.73 |
| 5 | 0.08 | 25 | 0.42 | 45 | 0.75 |
| 6 | 0.10 | 26 | 0.43 | 46 | 0.77 |
| 7 | 0.12 | 27 | 0.45 | 47 | 0.78 |
| 8 | 0.13 | 28 | 0.47 | 48 | 0.80 |
| 9 | 0.15 | 29 | 0.48 | 49 | 0.82 |
| 10 | 0.17 | 30 | 0.50 | 50 | 0.83 |
| 11 | 0.18 | 31 | 0.52 | 51 | 0.85 |
| 12 | 0.20 | 32 | 0.53 | 52 | 0.87 |
| 13 | 0.22 | 33 | 0.55 | 53 | 0.88 |
| 14 | 0.23 | 34 | 0.57 | 54 | 0.90 |
| 15 | 0.25 | 35 | 0.58 | 55 | 0.92 |
| 16 | 0.27 | 36 | 0.60 | 56 | 0.93 |
| 17 | 0.28 | 37 | 0.62 | 57 | 0.95 |
| 18 | 0.30 | 38 | 0.63 | 58 | 0.97 |
| 19 | 0.32 | 39 | 0.65 | 59 | 0.98 |
| 20 | 0.33 | 40 | 0.67 | 60 | 1.00 |
Common Time Conversions
| Time (HH:MM) | Decimal Hours | Use Case |
|---|---|---|
| 0:15 | 0.25 | Quarter hour break |
| 0:30 | 0.50 | Half hour lunch |
| 0:45 | 0.75 | Three-quarter hour |
| 1:00 | 1.00 | One hour meeting |
| 1:30 | 1.50 | 90-minute session |
| 2:00 | 2.00 | Two hour block |
| 4:00 | 4.00 | Half day |
| 7:30 | 7.50 | 7.5-hour workday |
| 8:00 | 8.00 | Standard workday |
| 8:30 | 8.50 | Workday + overtime |
Payroll Rounding Rules
⚠️ FLSA Rounding Guidelines
The U.S. Department of Labor allows employers to round employee time to the nearest increment (typically 5, 6, or 15 minutes) for payroll purposes, as long as rounding averages out over time. For example, if you work 8 minutes, your employer may round to 15 minutes (in your favor) or to 0 minutes (against you). Over time, these roundings should balance.
| Rounding Increment | Round Down If | Round Up If |
|---|---|---|
| 6-minute (0.1) | 1-3 minutes | 4-6 minutes |
| 15-minute (0.25) | 1-7 minutes | 8-15 minutes |
Official Resources
Frequently Asked Questions
Divide 45 by 60: 45 ÷ 60 = 0.75. So 45 minutes equals 0.75 hours in decimal format. If you worked 2 hours and 45 minutes, that would be 2.75 hours.
15 minutes = 0.25 hours. This is because 15 ÷ 60 = 0.25. Think of it as a quarter of an hour.
30 minutes = 0.50 hours (or simply 0.5). Half an hour = half of 1.00 = 0.50.
Multiply the decimal portion by 60: 0.75 × 60 = 45 minutes. So 1.75 hours = 1 hour and 45 minutes.
Decimal time makes payroll calculations simpler. If you earn $20/hour and work 8.5 hours, the calculation is easy: 8.5 × $20 = $170. With hours:minutes (8:30), you'd need to convert first.
First, convert all time to decimal. If you worked 45 hours: 45 - 40 = 5 hours overtime. Regular pay: 40 × $20 = $800. Overtime: 5 × $30 (1.5x) = $150. Total: $950.
20 ÷ 60 = 0.33 (rounded). So 8 hours 20 minutes = 8.33 hours. More precisely, it's 8.333... (repeating).
Most payroll systems use 2 decimal places (e.g., 8.50, not 8.5000). Some use 1 decimal place with rounding rules. Check your company's timesheet policy for the required precision.
No! This is a common mistake. 1.5 hours = 1 hour and 30 minutes (0.5 × 60 = 30). 1 hour 50 minutes would be 1.83 hours (50 ÷ 60 = 0.833).
Simply add them like regular numbers! 2.25 + 3.50 + 1.75 = 7.50 hours. No need to worry about carrying over 60 minutes — that's the beauty of decimal time.
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Last Updated: January 2025