Time to Decimal Converter
Enter hours and minutes and the converter returns the total as decimal hours or as minutes. Empty boxes count as zero, and the answer is rounded to two decimal places.
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Published by the Reeliy Editorial Team. Last updated: Oct 19, 2026
Using the time to decimal converter
Type the hours into the first box and the minutes into the second. Pick hours or minutes in the drop-down next to the answer. A box you leave empty is treated as zero, so you can convert 45 minutes by typing only the minutes. Both boxes accept decimals, which is useful when part of a time has already been converted.
How to convert time to decimal
An hour has 60 minutes, so minutes are divided by 60 before they are added to the hours.
decimal hours = hours + minutes ÷ 60
decimal minutes = hours × 60 + minutes
Example 1. 1 hour 30 minutes: 30 ÷ 60 = 0.5, so the total is 1.5 hours (or 90 minutes).
Example 2. 7 hours 59 minutes: 59 ÷ 60 = 0.9833, so the total is 7.9833, shown as 7.98 hours.
Example 3. 2 hours 15 minutes in minutes: 2 × 60 + 15 = 135 minutes.
Example 4. 3 hours 7 minutes: 7 ÷ 60 = 0.1167, so 3.12 hours.
Why convert to decimal time?
Pay is usually calculated by multiplying hours by a rate, and that is only practical with a single number. Someone who worked 7 hours 45 minutes at 18 per hour earns 7.75 × 18 = 139.50, whereas multiplying "7:45" directly makes no sense. Project billing, utilization reports and spreadsheets work the same way.
Add first, convert once. Rounding each entry to two decimals can leave you a hair off. Three 20 minute tasks give 0.33 + 0.33 + 0.33 = 0.99 hours when converted one by one, but together they last 60 minutes, which is exactly 1 hour. Total the minutes first, then convert the result. The time card calculator totals a whole week of start and end times for you.
Employers and countries apply their own rounding rules to pay periods. Use this converter as a calculation aid and check your payroll policy. See the disclaimer.
Minutes to decimal chart
| Minutes | Decimal hour | Minutes | Decimal hour |
|---|---|---|---|
| 1 | 0.02 | 35 | 0.58 |
| 5 | 0.08 | 40 | 0.67 |
| 10 | 0.17 | 45 | 0.75 |
| 15 | 0.25 | 50 | 0.83 |
| 20 | 0.33 | 55 | 0.92 |
| 25 | 0.42 | 59 | 0.98 |
| 30 | 0.5 | 60 | 1 |
The timesheet converter handles both directions on a single form.
Worked examples with the Time to Decimal Converter
Example 1. You enter: 1 hours 30 minutes · hours.
Result: You get 1.5.
Example 2. You enter: 1 hours 20 minutes · hours.
Result: You get 1.33.
Example 3. You enter: 2 hours 45 minutes · hours.
Result: You get 2.75.
Common mistakes with the Time to Decimal Converter
- Writing 8:15 as 8.15. A quarter of an hour is 0.25, so 8:15 is 8.25.
- Rounding decimal hours too early. A minute is 0.0167 of an hour, so rounding to one decimal can move a paycheck.
- Converting minutes to hundredths by mistake. Divide the minutes by 60.
Time to Decimal Converter FAQ
How do I convert 7 hours 45 minutes to decimal?
Divide the minutes by 60: 45 ÷ 60 = 0.75. Add it to the hours to get 7.75 hours.
What is 30 minutes as a decimal?
0.5 hours, because 30 ÷ 60 = 0.5.
What is 15 minutes as a decimal?
0.25 hours. A quarter of an hour is 15 ÷ 60 = 0.25.
Why do my totals differ by 0.01 when I convert each shift separately?
Each conversion is rounded to two decimals. Add the shifts in minutes first and convert the total once to avoid accumulating small rounding errors.
Cite this converter and page
If you use this page in your work, you can cite it as:
Reeliy Editorial Team. (2026). Time to Decimal Converter. Reeliy. https://reeliy.com/converters/time-to-decimal-converter“Time to Decimal Converter.” Reeliy, 2026, https://reeliy.com/converters/time-to-decimal-converter.