How to convert 40 minutes to decimal
Decimal hours = minutes ÷ 60, so 40 ÷ 60 = 0.6666…, which rounds to 0.67.
Going back: 0.67 × 60 = 40.2 minutes, which rounds to 40 minutes. Any whole number of hours plus 40 minutes ends in .67: 1:40 = 1.67, 7:40 = 7.67, 8:40 = 8.67.
Payroll example
You work 3 hours 40 minutes at $21.50 an hour.
- Convert the time: 3 + 40 ÷ 60 = 3 + 0.67 = 3.67 hours.
- Multiply by the rate: 3.67 × $21.50 = $78.91.
Paying on the exact time (3 hours 40 minutes × $21.50) gives $78.83. The $0.08 difference comes from rounding 3.6666… to 3.67.
Typing 3:40 as 3.40 would pay $73.10 instead: $5.81 too little. Add up a whole week of clock times with the time card calculator.
Minutes near 40 in decimal
| Minutes | Decimal hours | Exact |
|---|---|---|
| 37 | 0.62 | 0.6166… |
| 38 | 0.63 | 0.6333… |
| 39 | 0.65 | 0.65 |
| 40 | 0.67 | 0.6666… |
| 41 | 0.68 | 0.6833… |
| 42 | 0.70 | 0.7 |
| 43 | 0.72 | 0.7166… |
See every value from 1 to 59 in the full minutes to decimal chart (printable).
Frequently asked questions
How do I write 40 minutes on a timesheet?
If the timesheet asks for decimal hours, write 0.67. If it asks for hours and minutes, write 0:40. For 3 hours 40 minutes, that is 3.67 in decimal or 3:40 in hours and minutes.
How many minutes is 0.67 hours?
0.67 × 60 = 40.2 minutes, which rounds to 40 minutes. The small difference comes from rounding 0.6666… to 0.67.