How do I convert time to decimal hours?

Add the hours, then divide the minutes by 60 and seconds by 3600.

Can I convert decimal hours back to clock time?

Yes. The calculator converts a decimal hour value back into hours, minutes, and seconds.

Decimal hours are useful for timesheets, billing, and data entry.

Convert clock time to decimal hours or convert decimal hours back to clock time.

Use it for timesheets, billing, or quick time conversion.

Mode

Hours

Decimal hours

To convert clock time to decimal hours, add hours plus minutes divided by 60 plus seconds divided by 3600.

Decimal hours = hours + minutes / 60 + seconds / 3600

Clock time = integer hours + remaining minutes + remaining seconds

Example 1: 1h 30m = 1.5 hours.

Example 2: 2h 15m 30s = 2.2583 hours.

Example 3: 3.75 hours = 3h 45m.

Output	Meaning	Action
Decimal hours	Time expressed as a decimal number.	Use it for timesheets and billing.
Clock time	Time expressed as hours, minutes, and seconds.	Use it when reading schedules or logs.
Conversion mode	Shows which direction the calculator used.	Make sure it matches the value you entered.

45 minutes is 0.75 decimal hours.

Yes. Seconds are included in the conversion.

Yes. Switch to decimal-to-clock mode to convert back to hours, minutes, and seconds.