Hours to decimal converter

Convert hours and minutes to decimal hours, or convert decimal hours back to hours and minutes. This free time to decimal calculator accepts one duration per line, so you can convert a single entry or a pasted list of up to 100. Review individual results, then print or download text and CSV output.

Convert hours and minutes to decimal hours

Choose the hours-and-minutes direction and enter each duration as hours:minutes, such as 7:30. Put each duration on its own line. The part after the colon represents minutes and must be between 00 and 59.

Decimal hours = whole hours + minutes ÷ 60

For example, 7:30 becomes 7 + 30 ÷ 60 = 7.5 hours. A duration of 7:45 becomes 7 + 45 ÷ 60 = 7.75 hours.

These are durations rather than clock times. A value of 25:30 means 25 hours and 30 minutes, which converts to 25.5 hours; it is not a time of day.

Convert decimal hours to hours and minutes

Choose the decimal-hours direction and enter a number such as 7.5, again using one duration per line. The converter multiplies decimal hours by 60 and rounds to the nearest whole minute before splitting the total into hours and minutes.

For example, 7.5 × 60 = 450 minutes, giving 7:30. A value of 1.999 hours is 119.94 minutes, which rounds to 120 minutes and displays as 2:00. Rounding the whole duration first avoids showing an impossible 1:60.

The conversion rounds a measurement to minutes. It does not apply a payroll rounding policy, an overtime rule or a break deduction.

Common duration conversions

The most common mistake is reading 7:30 as 7.30 decimal hours. Thirty minutes is half an hour, so 7:30 equals 7.5. In the other direction, 7.30 decimal hours equals seven hours and 18 minutes, because 0.30 × 60 = 18.

Convert a list and keep the results

Paste only the durations, one per line. Keep the list to 100 non-empty entries and use the format for the selected direction. An invalid line receives its own explanation so you can correct it without guessing which value caused the problem. Decimal-hour results display up to four decimal places; hours-and-minutes results round to the nearest minute.

Check the input and output columns before using the results elsewhere. Use the text or CSV download for a separate copy, or print the results and choose PDF in the browser's print dialog. The sample provides values to try, and the blank action lets you replace them with your own list.

For start and end times, breaks and a whole worked week, use the timesheet calculator. Use the PTO accrual calculator after converting leave durations if its inputs need decimal hours. The pay raise calculator compares pay rates separately from these time conversions.

Frequently asked questions

Does this decimal time calculator convert clock times?

It converts elapsed durations. It does not handle dates, time zones or a shift crossing midnight. Use a timesheet calculation to find the duration first, then convert it if needed.

Can I convert more than 24 hours?

Yes. Durations can exceed one day. Keep the minutes portion below 60 when using the hours:minutes format.

Why does converting back sometimes change a value slightly?

Decimal hours may represent a fraction of a minute. Conversion back to hours and minutes rounds to the nearest minute, so second-level precision is not retained.

Does it send the list to payroll?

No. It provides local conversions and downloadable output. It does not send results to payroll or update a timesheet or employee record.