Time to Decimal CalculatorConvert hours and minutes to decimal hours, and back
Convert hours, minutes and seconds to decimal hours for payroll, timesheets and invoices, or turn decimal hours back into h:mm:ss, with pay from your hourly rate.
- Both directions
- Seconds included
- Tenth-hour rounding
- Full 1–60 min chart
Time to decimal calculator
Decimal hours
7.75
How do you convert hours and minutes to decimal?
Divide the minutes by 60 and add the result to the hours. 7 hours 45 minutes = 7 + 45 ÷ 60 = 7.75 hours. With seconds, divide them by 3,600 too. To go back, multiply the decimal part by 60: 8.4 hours = 8 hours + 0.4 × 60 = 8 hours 24 minutes. Payroll uses decimal hours because you can multiply them directly by an hourly rate.
Minutes to decimal hours chart (1–60 minutes)
Look up the decimal for any number of minutes, then add it to your whole hours. Example: 6 h 20 min → 6 + 0.33 = 6.33.
| Min | Decimal | Min | Decimal | Min | Decimal | Min | 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 |
Decimal-time mistakes on timesheets
Writing 7:45 as 7.45
7.45 hours is 7 h 27 min. At $20/h, writing 7.45 instead of 7.75 under-pays $6 for the day.
Rounding too early
Convert the weekly total, not each day rounded to 0.1. Rounding every day can cost or add up to 15 minutes a week.
Hundredths vs tenths
Some payroll systems use tenths of an hour (6-minute blocks). The “nearest 1/10 hour” tile shows that value.
Seconds ignored
For call-centre or billing logs, 1:02:30 is 1.0417 h, not 1.02. Include the seconds.
Related calculators
Decimal hours usually feed into one of these:
More Time & Work Hours calculators in this cluster:
Manzoor Ahmad
Calculator Developer · Founder of DexoCalc
I’m a pharmacist turned web developer with 13+ years of experience building web tools. The “7:45 is not 7.45” mistake costs hourly workers real money, so I made it the first thing this page explains. The conversions run in whole seconds, so there’s no rounding drift.
Published · Last reviewed · Author profile · Report an issue
Decimal time: frequently asked questions
7.75 hours, because 45 minutes ÷ 60 = 0.75.
Divide the minutes by 60. 15 min = 0.25 h, 30 min = 0.5 h, 20 min = 0.33 h. The chart above lists every minute from 1 to 60.
Keep the whole number as hours and multiply the decimal part by 60 for minutes. 5.6 hours = 5 h + 0.6 × 60 = 5 h 36 min. Switch to ‘Decimal → time’ above.
6 minutes. Many payroll systems track time in tenths of an hour, which are 6-minute blocks.
Convert to decimal hours first, then multiply by your hourly rate: 7:45 at $22/h = 7.75 × 22 = $170.50. Enter your rate to see it.
Yes. Total the week with the time card calculator, which shows hours:minutes and decimal hours together.
Sources & references
- Fact Sheet #22: Hours Worked Under the FLSA, US Department of Labor
- 29 CFR 785.48: Use of time clocks and rounding, eCFR
For pay estimates only. Your employer’s payroll system and rounding policy determine actual pay.