How do you convert decimal hours to hours and minutes?

The whole number represents hours, and the decimal portion is multiplied by 60. For example: 5.5 hours = 5 hours and 0.5 × 60 = 30 minutes. Similarly, 7.75 hours = 7 hours and 0.75 × 60 = 45 minutes.

How do you calculate shifts that cross midnight?

If a shift spans into the next day (for instance, 22:00 to 06:00), add 24 hours to the end time (06:00 becomes 30:00). Then calculate: 30:00 − 22:00 = 8 hours total duration.

Time & Hours

Time Calculator: What Time Will It Be?

Find out what time an event ends or when you will finish work (e.g. start 07:30 + 5.5 hrs = 13:00). Also calculate the duration between two times, date intervals, and convert between seconds, minutes, and decimal hours.

Start Time

Operation

Duration to Add or Subtract= 5.5 h

Hours

Minutes

As decimal hours:

Quick Presets:

Resulting Clock Time

07:30 + 5 h 30 min

13:00

Same day

In decimal hours:5.5 h

In minutes:330 min

In seconds:19 800 s

Frequently Asked Questions

Answers to common questions about calculations, rules, and practices.

Convert the duration into hours and minutes (for example, 5.5 hours is 5 hours and 30 minutes). Add the hours and minutes to your start time. For example: 07:30 + 5 hrs 30 mins = 13:00 (1:00 PM).