Finance
Time to Decimal Calculator FAQ
Use this browser converter for payroll, timecards, and Excel.
FAQ
What is a decimal hour?+
A decimal hour writes time in base-10 instead of the traditional hours-and-minutes (HH:MM) format. For example, 1 hour 30 minutes becomes 1.5000 hours, and 7 hours 45 minutes becomes 7.7500 hours. This format is widely used in payroll systems, time tracking software, and spreadsheet calculations because it allows straightforward arithmetic.
Is this calculator good for payroll or timesheets?+
Yes. It is built specifically for payroll, timecard, and timesheet conversion. It shows three formats at once: exact decimal hours (most precise), hundredths (rounded to 2 decimal places, used by most payroll systems), and quarter-hour rounding (used by timecards that round to the nearest 15 minutes).
Is this a calculator or a converter?+
Both. It converts HH:MM into decimal hours in your browser instantly with no server calls, and it displays three useful formats—exact, hundredths, and quarter-hour—so you can use the value that matches your payroll or timecard system without doing the math yourself.
How do I use this in Excel?+
Excel stores time as a fraction of a day, so to convert a time cell (A1) to decimal hours, multiply by 24 with the formula =A1*24. For payroll rounding, use =ROUND(A1*24, 2) for hundredths or =MROUND(A1*24, 0.25) for quarter-hour rounding. The calculator gives you these values directly for reference.
What is the difference between hundredths and quarter-hour rounding?+
Hundredths rounding rounds the decimal hours to two decimal places (e.g., 7:28 = 7.47 hours), which is the most common format for payroll systems. Quarter-hour rounding rounds to the nearest 0.25 increment (e.g., 7:28 rounds to 7.50 because 28 minutes is closest to 30). Some time tracking systems use quarter-hour, others use hundredths, and some use 6-minute (0.10) increments.
Does the calculator handle seconds or fractional minutes?+
No. The calculator works with whole minutes only. Seconds and fractional minutes (e.g., 7:28:30 or 7:28.5) are not supported. For most payroll and timecard use cases, rounding to the nearest whole minute is standard practice, so this limitation rarely matters in practice.
How do I convert decimal hours back to HH:MM?+
To convert decimal hours back to HH:MM, take the whole number as the hours, then multiply the fractional part by 60 to get the minutes. For example, 7.75 hours: 7 hours + (0.75 × 60) = 7:45. In Excel, use =INT(A1) for hours and =ROUND(MOD(A1,1)*60, 0) for minutes.