How to convert 18 minutes to decimal
Decimal hours = minutes ÷ 60, so 18 ÷ 60 = 0.3.
Going back: 0.30 × 60 = 18 minutes. Any whole number of hours plus 18 minutes ends in .30: 1:18 = 1.30, 7:18 = 7.30, 8:18 = 8.30.
Payroll example
You work 7 hours 18 minutes at $21.50 an hour.
- Convert the time: 7 + 18 ÷ 60 = 7 + 0.30 = 7.30 hours.
- Multiply by the rate: 7.30 × $21.50 = $156.95.
Typing 7:18 as 7.18 would pay $154.37 instead: $2.58 too little. Add up a whole week of clock times with the time card calculator.
Minutes near 18 in decimal
| Minutes | Decimal hours | Exact |
|---|---|---|
| 15 | 0.25 | 0.25 |
| 16 | 0.27 | 0.2666… |
| 17 | 0.28 | 0.2833… |
| 18 | 0.30 | 0.3 |
| 19 | 0.32 | 0.3166… |
| 20 | 0.33 | 0.3333… |
| 21 | 0.35 | 0.35 |
See every value from 1 to 59 in the full minutes to decimal chart (printable).
Frequently asked questions
How do I write 18 minutes on a timesheet?
If the timesheet asks for decimal hours, write 0.30. If it asks for hours and minutes, write 0:18. For 7 hours 18 minutes, that is 7.30 in decimal or 7:18 in hours and minutes.
How many minutes is 0.30 hours?
0.30 hours is exactly 18 minutes: 0.30 × 60 = 18.