How to convert 21 minutes to decimal
Decimal hours = minutes ÷ 60, so 21 ÷ 60 = 0.35.
Going back: 0.35 × 60 = 21 minutes. Any whole number of hours plus 21 minutes ends in .35: 1:21 = 1.35, 7:21 = 7.35, 8:21 = 8.35.
Payroll example
You work 2 hours 21 minutes at $25.50 an hour.
- Convert the time: 2 + 21 ÷ 60 = 2 + 0.35 = 2.35 hours.
- Multiply by the rate: 2.35 × $25.50 = $59.93.
Typing 2:21 as 2.21 would pay $56.36 instead: $3.57 too little. Add up a whole week of clock times with the time card calculator.
Minutes near 21 in decimal
| Minutes | Decimal hours | Exact |
|---|---|---|
| 18 | 0.30 | 0.3 |
| 19 | 0.32 | 0.3166… |
| 20 | 0.33 | 0.3333… |
| 21 | 0.35 | 0.35 |
| 22 | 0.37 | 0.3666… |
| 23 | 0.38 | 0.3833… |
| 24 | 0.40 | 0.4 |
See every value from 1 to 59 in the full minutes to decimal chart (printable).
Frequently asked questions
How do I write 21 minutes on a timesheet?
If the timesheet asks for decimal hours, write 0.35. If it asks for hours and minutes, write 0:21. For 2 hours 21 minutes, that is 2.35 in decimal or 2:21 in hours and minutes.
How many minutes is 0.35 hours?
0.35 hours is exactly 21 minutes: 0.35 × 60 = 21.