The hours-and-minutes formula
The math is the same as the colon-based version: hours + minutes ÷ 60.
Working examples:
- 7 h 45 m → 7 + 45 ÷ 60 = 7.75 hours
- 8 h 15 m → 8 + 15 ÷ 60 = 8.25 hours
- 40 h 30 m → 40 + 30 ÷ 60 = 40.5 hours (typical work week)
- 2 h 5 m → 2 + 5 ÷ 60 = 2.083 hours
Why a two-box version?
On mobile keyboards, finding the colon takes a tap-and-hold or a switch to symbols. The two-box input lets you stay on the numeric keypad, which feels noticeably faster after the first dozen entries. We hear this most from:
- Field crews entering daily hours on a phone in the car.
- Healthcare workers filling out shift logs on tablets.
- Anyone with fat fingers who got tired of typing
:as a comma by accident.
Where the result goes
Decimal hours feed payroll. If your manager asks for “total hours worked this week” in a spreadsheet, decimal is what they want. 40:30 doesn’t multiply by an hourly rate; 40.5 does.
For the reverse direction (decimal back to HH:MM), use the decimal-to-time tool. For the multi-row weekly version, use the timesheet calculator.
Common values for shift workers
| Shift | HH:MM | Decimal |
|---|---|---|
| Standard 8-hour | 8:00 | 8.00 |
| 8-hour with 30-min lunch | 7:30 | 7.50 |
| 9-hour | 9:00 | 9.00 |
| 10-hour with 30-min break | 9:30 | 9.50 |
| 12-hour with 30-min break | 11:30 | 11.50 |
| 12-hour with 1-hour break | 11:00 | 11.00 |
| Night shift 22:00→06:00 | 8:00 | 8.00 |
| Half day | 4:00 | 4.00 |
Frequently asked questions
What is 8 hours 15 minutes in decimal?
8.25 hours. The 15-minute portion is 15 ÷ 60 = 0.25, added to 8.
What about 12 hours 30 minutes?
12.5 hours. Half an hour is exactly 0.5 in decimal.
Can I enter more than 99 hours?
Yes — the calculator accepts any non-negative integer for hours. Useful for monthly totals or project budgets.
Should I use this for payroll?
For straight conversion, yes. For payroll-compliant rounding (FLSA), pick the “DOL 7-min” chip above and read the rounding rules guide.
