Calculator
Hours to decimal calculator
Convert both ways. Rate is optional.
Decimal hours7.757 h 45 min = 465 minutes
| Rounded to 2 places (payroll) | 7.75 |
|---|---|
| Pay at $18.00/h | $139.50 |
| 7.6 decimal hours is | 7 h 36 min (7:36) |
How to convert hours and minutes to decimal
An hour has 60 minutes and 3,600 seconds[nist], so the conversion is:
decimal hours = hours + minutes ÷ 60 + seconds ÷ 3,600
- 8 h 20 min = 8 + 20 ÷ 60 = 8.33 hours (8.3333…)
- 5 h 6 min = 5 + 0.1 = 5.1 hours
- 2 h 30 min 30 s = 2 + 0.5 + 0.0083 = 2.51 hours
Going the other way, multiply the decimal part by 60. 7.6 hours is 7 hours and 0.6 × 60 = 36 minutes, or 7:36.
Minutes to decimal hours chart
| Minutes | Decimal | Minutes | Decimal | Minutes | Decimal | Minutes | Decimal |
|---|---|---|---|---|---|---|---|
| 1 min | 0.02 | 16 min | 0.27 | 31 min | 0.52 | 46 min | 0.77 |
| 2 min | 0.03 | 17 min | 0.28 | 32 min | 0.53 | 47 min | 0.78 |
| 3 min | 0.05 | 18 min | 0.30 | 33 min | 0.55 | 48 min | 0.80 |
| 4 min | 0.07 | 19 min | 0.32 | 34 min | 0.57 | 49 min | 0.82 |
| 5 min | 0.08 | 20 min | 0.33 | 35 min | 0.58 | 50 min | 0.83 |
| 6 min | 0.10 | 21 min | 0.35 | 36 min | 0.60 | 51 min | 0.85 |
| 7 min | 0.12 | 22 min | 0.37 | 37 min | 0.62 | 52 min | 0.87 |
| 8 min | 0.13 | 23 min | 0.38 | 38 min | 0.63 | 53 min | 0.88 |
| 9 min | 0.15 | 24 min | 0.40 | 39 min | 0.65 | 54 min | 0.90 |
| 10 min | 0.17 | 25 min | 0.42 | 40 min | 0.67 | 55 min | 0.92 |
| 11 min | 0.18 | 26 min | 0.43 | 41 min | 0.68 | 56 min | 0.93 |
| 12 min | 0.20 | 27 min | 0.45 | 42 min | 0.70 | 57 min | 0.95 |
| 13 min | 0.22 | 28 min | 0.47 | 43 min | 0.72 | 58 min | 0.97 |
| 14 min | 0.23 | 29 min | 0.48 | 44 min | 0.73 | 59 min | 0.98 |
| 15 min | 0.25 | 30 min | 0.50 | 45 min | 0.75 | 60 min | 1.00 |
The 1.30 mistake, and other payroll traps
The most common payroll error is reading 1:30 as 1.30. One and a half hours is 1.50 in decimal; 1.30 hours is only 1 hour 18 minutes. On a $20 rate that one slip underpays $4 a day.
- Round once, at the end. Rounding each day to two places and then adding can drift a few cents from rounding the weekly total.
- Tenth-hour systems work in 6-minute blocks: 0.1 = 6 min, 0.2 = 12 min, 0.5 = 30 min.
- Quarter-hour systems use 0.25, 0.5 and 0.75. Federal rules allow rounding to the nearest 5 minutes, tenth or quarter hour only if it averages out over time[r785].
Decimal hours calculator for a whole week
Adding times like 7:45 + 8:20 + 6:55 is easier in decimal: 7.75 + 8.33 + 6.92 = 23.00 hours. For a full week of clock-in and clock-out times, use the time card calculator, which converts automatically and flags overtime after 40 hours. To price the hours, the time and a half calculator handles overtime and the weekly paycheck calculator takes out taxes.
Frequently asked questions
How do I convert minutes to decimal hours?
Divide the minutes by 60. 15 minutes = 0.25, 20 minutes = 0.33, 40 minutes = 0.67, 50 minutes = 0.83.
What is 7 hours and 45 minutes as a decimal?
7.75 hours. 45 ÷ 60 = 0.75.
How does an hours to decimal calculator handle seconds?
It divides seconds by 3,600. 30 seconds is 0.0083 hours, so seconds rarely change payroll totals rounded to two places.
What is 8.6 hours in hours and minutes?
8 hours 36 minutes: 0.6 × 60 = 36.