Time card conversion chart: minutes to decimal hours
To turn minutes into decimal hours, divide them by 60: 45 minutes is 0.75 hours, so 7 hours 45 minutes is 7.75. The chart below lists every minute from 1 to 59, and the converter does it both ways.
Minutes to decimal hours chart
Find the minutes on the left and read the decimal on the right. Add it to the whole hours: 8 hours 23 minutes is 8 + 0.38 = 8.38 hours. Values are rounded to two places, the way payroll systems take them.
| Minutes | Decimal | Fraction |
|---|---|---|
| 1 | 0.02 | |
| 2 | 0.03 | |
| 3 | 0.05 | |
| 4 | 0.07 | |
| 5 | 0.08 | |
| 6 | 0.10 | 1/10 |
| 7 | 0.12 | |
| 8 | 0.13 | |
| 9 | 0.15 | |
| 10 | 0.17 | 1/6 |
| 11 | 0.18 | |
| 12 | 0.20 | 1/5 |
| 13 | 0.22 | |
| 14 | 0.23 | |
| 15 | 0.25 | 1/4 |
| 16 | 0.27 | |
| 17 | 0.28 | |
| 18 | 0.30 | |
| 19 | 0.32 | |
| 20 | 0.33 | 1/3 |
| 21 | 0.35 | |
| 22 | 0.37 | |
| 23 | 0.38 | |
| 24 | 0.40 | |
| 25 | 0.42 | |
| 26 | 0.43 | |
| 27 | 0.45 | |
| 28 | 0.47 | |
| 29 | 0.48 | |
| 30 | 0.50 | 1/2 |
| Minutes | Decimal | Fraction |
|---|---|---|
| 31 | 0.52 | |
| 32 | 0.53 | |
| 33 | 0.55 | |
| 34 | 0.57 | |
| 35 | 0.58 | |
| 36 | 0.60 | |
| 37 | 0.62 | |
| 38 | 0.63 | |
| 39 | 0.65 | |
| 40 | 0.67 | 2/3 |
| 41 | 0.68 | |
| 42 | 0.70 | |
| 43 | 0.72 | |
| 44 | 0.73 | |
| 45 | 0.75 | 3/4 |
| 46 | 0.77 | |
| 47 | 0.78 | |
| 48 | 0.80 | |
| 49 | 0.82 | |
| 50 | 0.83 | 5/6 |
| 51 | 0.85 | |
| 52 | 0.87 | |
| 53 | 0.88 | |
| 54 | 0.90 | |
| 55 | 0.92 | |
| 56 | 0.93 | |
| 57 | 0.95 | |
| 58 | 0.97 | |
| 59 | 0.98 |
How to convert hours and minutes to decimal
Keep the whole hours as they are and divide only the minutes by 60.
- Split the time into hours and minutes: 38 hours 50 minutes.
- Divide the minutes by 60: 50 / 60 = 0.8333.
- Round to two places and add the hours: 38.83 hours.
Going the other way, multiply the decimal part by 60. 6.4 hours is 6 hours plus 0.4 x 60 = 24 minutes, so 6 hours 24 minutes. A common mistake is to read 6.4 hours as 6 hours 40 minutes. It is 24.
Why the decimal matters for pay
Pay is hours times rate, and a rate cannot be multiplied by a clock time. Writing 7 hours 45 minutes as 7.45 instead of 7.75 loses 18 minutes. At $18 an hour that is $5.40 a day, or $27 over a five day week, paid to nobody.
Rounding to two places can still drift by a cent or two over a long week. The time card calculator avoids that by working in exact minutes and rounding money to the cent only once, at the end.
Tenths of an hour: the 6 minute chart
Some time clocks and payroll systems count time in tenths of an hour. Each tenth is 6 minutes.
| Tenths | Minutes | Tenths | Minutes |
|---|---|---|---|
| 0.1 | 6 | 0.6 | 36 |
| 0.2 | 12 | 0.7 | 42 |
| 0.3 | 18 | 0.8 | 48 |
| 0.4 | 24 | 0.9 | 54 |
| 0.5 | 30 | 1.0 | 60 |
Quarter hours
A quarter hour is 15 minutes, or 0.25. Many paper time cards are added up in quarters: 15 minutes is 0.25, 30 minutes is 0.50, 45 minutes is 0.75.
If your workplace rounds punches to the nearest quarter hour, a punch at 8:07 counts as 8:00 and a punch at 8:08 counts as 8:15. Federal rules (29 CFR 785.48) allow rounding to the nearest 5, 6 or 15 minutes only if it evens out over time. Rounding that always favors the employer, like rounding every clock-in up and every clock-out down, is not allowed.
Common conversions
| Time | Decimal hours |
|---|---|
| 7 hours 30 minutes | 7.50 |
| 7 hours 45 minutes | 7.75 |
| 8 hours 20 minutes | 8.33 |
| 8 hours 35 minutes | 8.58 |
| 37 hours 30 minutes | 37.50 |
| 40 hours 25 minutes | 40.42 |
| 44 hours 10 minutes | 44.17 |
To get the hours in the first place, type each day's in and out times into the time card calculator. It shows the total both ways, like 41h 35m and 41.58 hours.
Ready to add up your own week?
Open the time card calculator