Add, subtract, or calculate the duration between times. Convert between decimal hours and hours:minutes:seconds format. Perfect for timesheets and payroll.
Time
10:15:00
Time 1
Time 2
Time Format
10:15:00
10 hours, 15 minutes, 0 seconds
Decimal Hours
10.2500
Rounded: 10.25 hours
0.25
15 min
0.50
30 min
0.75
45 min
1.00
1 hour
1.25
1:15
1.50
1:30
1.75
1:45
2.00
2 hours
| Schedule | Hours/Day | Hours/Week | Decimal/Day |
|---|---|---|---|
| Standard (9-5) | 8:00 | 40:00 | 8.0 |
| With 30min lunch | 7:30 | 37:30 | 7.5 |
| With 1hr lunch | 7:00 | 35:00 | 7.0 |
| Part-time (6hrs) | 6:00 | 30:00 | 6.0 |
| Extended (10hrs) | 10:00 | 40:00 | 10.0 |
To calculate hours between times: subtract start from end time. From 9:00 AM to 5:30 PM = 8 hours 30 minutes = 8.5 decimal hours. To convert minutes to decimal: divide by 60 (30 min = 0.5 hours). For overnight shifts, add 24 hours if end time is smaller than start. Work week: 40 hours standard, overtime usually kicks in after 8 hours/day or 40 hours/week.
To add times, convert everything to the same unit (usually minutes), add them together, then convert back. For example, 2:45 + 1:30 = (165 + 90) minutes = 255 minutes = 4:15.
Decimal time represents hours as a decimal number instead of hours:minutes. For example, 1.5 hours = 1 hour 30 minutes. It's commonly used in payroll, billing, and timesheets because it's easier to calculate with.
Divide minutes by 60. For example, 45 minutes = 45/60 = 0.75 hours. Common conversions: 15 min = 0.25, 30 min = 0.5, 45 min = 0.75. For 2 hours 15 minutes: 2 + (15/60) = 2.25 hours.
Use "Time Between" mode. Enter your start time and end time. The calculator will show the duration. For overnight shifts, it automatically accounts for crossing midnight. Remember to subtract breaks!
When the end time is before the start time (like 10 PM to 6 AM), the calculator assumes the end time is the next day and adds 24 hours automatically. The result shows the actual duration.
Military (24-hour) time runs from 00:00 to 23:59 without AM/PM. Convert PM times by adding 12 (1 PM = 13:00). This calculator accepts both formats but displays in 24-hour format internally.
Time
10:15:00