Time to Decimal Converter (HH:MM ⇄ Hours)
Convert clock time like 2:30 to decimal hours (2.5) and back for timesheets and payroll, accepting HH:MM or HH:MM:SS.
2.5
2:30
Or enter a duration in separate boxes — minutes and seconds are not capped the way a clock caps them
Rounds to the nearest step, half up: on the 15-minute step, 7 minutes past it rounds down and 8 rounds up — the 7-minute rule.
Minutes to decimal hours
| Minutes | Decimal hours |
|---|---|
| 1 | 0.02 |
| 2 | 0.03 |
| 3 | 0.05 |
| 4 | 0.07 |
| 5 | 0.08 |
| 6 | 0.10 |
| 7 | 0.12 |
| 8 | 0.13 |
| 9 | 0.15 |
| 10 | 0.17 |
| 11 | 0.18 |
| 12 | 0.20 |
| 13 | 0.22 |
| 14 | 0.23 |
| 15 | 0.25 |
| Minutes | Decimal hours |
|---|---|
| 16 | 0.27 |
| 17 | 0.28 |
| 18 | 0.30 |
| 19 | 0.32 |
| 20 | 0.33 |
| 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 |
| Minutes | Decimal hours |
|---|---|
| 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 |
| 41 | 0.68 |
| 42 | 0.70 |
| 43 | 0.72 |
| 44 | 0.73 |
| 45 | 0.75 |
| Minutes | Decimal hours |
|---|---|
| 46 | 0.77 |
| 47 | 0.78 |
| 48 | 0.80 |
| 49 | 0.82 |
| 50 | 0.83 |
| 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 |
| 60 | 1.00 |
Convert time to decimal hours (and back)
Enter a clock time such as 2:30 and this tool shows it as 2.5 decimal hours; type a decimal like 8.25 and it shows 8:15. It accepts both HH:MM and HH:MM:SS, and hours are not capped at 24, so a weekly total like 40:00 converts cleanly to 40. Minutes and seconds are validated to the 0–59 range, so a typo such as 1:75 is flagged instead of being silently miscounted. Everything is computed locally in your browser — nothing you type is uploaded.
Why decimal hours matter for payroll
Most payroll and billing systems multiply an hourly rate by hours worked, and they expect hours as a decimal, not as minutes. Thirty minutes is not 0.30 of an hour — it is 0.5 — and getting that wrong quietly under- or over-pays every timesheet. This converter does the exact arithmetic (minutes ÷ 60 and seconds ÷ 3600), so 15 minutes becomes 0.25, 20 minutes becomes about 0.333, and 45 minutes becomes 0.75. Copy the result straight into a spreadsheet or invoice.
Frequently asked questions
How do I convert 2:30 to decimal hours?
Two hours and thirty minutes is 2 + 30/60 = 2.5 decimal hours. Type 2:30 into the time field to see 2.5 instantly, or type 2.5 into the decimal field to get 2:30 back.
How are minutes converted to a decimal?
Divide the minutes by 60. So 15 minutes is 15/60 = 0.25, 20 minutes is about 0.333, and 45 minutes is 0.75. Seconds are divided by 3600 and added on, which is why HH:MM:SS is supported too.
Can it handle more than 24 hours for a weekly timesheet?
Yes. Hours are not capped, so 40:00 converts to 40 and 100:30 converts to 100.5. Only the minutes and seconds fields are restricted to 0 to 59.
Can it round for payroll and work out the pay?
Yes. Round to the nearest quarter or tenth of an hour, add an hourly rate, and the page gives the hours to pay and the gross pay.
Can I convert a decimal of minutes, seconds or days, and see it spelled out?
Yes. “Unit of the decimal”, beside the decimal box, takes days, hours (the default), minutes or seconds, and changing it re-reads the number in the new unit. Under the clock answer the same duration is spelled out in days, hours, minutes and seconds, and “Show hundredths of a second” keeps the fraction of a second.