Convert Time to Decimal
Type hours and minutes and get decimal hours. The quick converter below turns 8:45 into 8.75 and handles seconds too. Need rounding rules, a list of entries or a full timesheet? Pick a tool further down.
Example: 8:45 or 8:45:30. Hours can go above 24.
Decimal hours
8.75hours
8 h 45 min = 8.75 hours
Need quarter-hour or 6-minute rounding? Use the time to decimal calculator.
How to convert time to decimal
To convert time to decimal by hand, divide the minutes by 60 and add the result to the hours. Seconds are divided by 3,600.
decimal hours = hours + minutes ÷ 60 + seconds ÷ 3,600
Worked example: Convert 7 hours 20 minutes
- Minutes ÷ 60: 20 ÷ 60 = 0.3333…
- Add the hours: 7 + 0.3333 = 7.3333
- Round to 2 places: 7.33
7:20 = 7.33 decimal hours
Common times in decimal hours
Values are calculated, not typed by hand, and rounded to 2 decimal places.
| Time (h:mm) | Decimal (2 places) | Exact |
|---|---|---|
| 0:05 | 0.08 | 0.0833 |
| 0:10 | 0.17 | 0.1667 |
| 0:15 | 0.25 | 0.25 |
| 0:20 | 0.33 | 0.3333 |
| 0:30 | 0.50 | 0.50 |
| 0:40 | 0.67 | 0.6667 |
| 0:45 | 0.75 | 0.75 |
| 1:00 | 1.00 | 1.00 |
| 1:30 | 1.50 | 1.50 |
| 2:15 | 2.25 | 2.25 |
| 3:40 | 3.67 | 3.6667 |
| 5:50 | 5.83 | 5.8333 |
| 7:30 | 7.50 | 7.50 |
| 7:45 | 7.75 | 7.75 |
| 8:00 | 8.00 | 8.00 |
| 8:20 | 8.33 | 8.3333 |
All calculators and charts
- Time to decimal calculatorOne time in, decimal hours out, with the rounding rule your payroll uses.
- Hours to decimal calculatorPaste a list of daily hours and get each one in decimal, plus a total.
- Decimal hours calculatorTurn 7.75 back into 7:45, with seconds and days for long durations.
- Decimal time converterOne converter, three directions: time, decimal hours and plain minutes.
- Timesheet calculatorWeekly timesheet with unpaid breaks, overnight shifts, totals and pay.
- PTO calculatorProject your PTO balance on a future date and convert hours to days.
- Minutes to decimal chartEvery minute from 1 to 60 as decimal hours, plus seconds and a reverse lookup.
- Quarter hour rounding chartThe 7-minute, 6-minute and 5-minute rounding rules for every minute past the hour.
Frequently asked questions
How do I convert time to decimal?
Divide the minutes by 60 and add the hours. For 8:45 that is 8 + 45 ÷ 60 = 8.75. If there are seconds, divide them by 3,600. The converter at the top of this page does it as you type.
Why do timesheets use decimal hours?
Payroll multiplies hours by a pay rate, and that is much easier with one number than with hours and minutes. 7.5 × 20 is simple arithmetic; 7 hours 30 minutes × 20 is not.
Is 8:30 the same as 8.30?
No. 8:30 means eight and a half hours, which is 8.50 in decimal. 8.30 decimal hours is 8 hours 18 minutes. Mixing the two up is the most common timesheet mistake.
How many decimal hours is 15 minutes?
0.25 hours. Likewise 30 minutes is 0.5, 45 minutes is 0.75 and 6 minutes is 0.1.
Which page should I use to round to the nearest quarter hour?
Use the time to decimal calculator and choose quarter-hour rounding, or look up a specific minute on the quarter hour rounding chart.
Does this site save or send my times?
No. Everything is calculated in your browser. Your last inputs are kept in your own browser's local storage so they are there when you return; clear your site data to remove them. See the privacy page for details.