Time calculator

Add or subtract durations, or find what time it will be a number of hours and minutes from now.

Calculate
First durationStart time
Operation
Second durationDuration

Questions people ask

How do I add hours and minutes?

Add minutes to minutes and hours to hours, then carry every 60 minutes into an hour. 2 h 45 min + 1 h 30 min = 3 h 75 min = 4 h 15 min.

How do I turn minutes into decimal hours?

Divide by 60. 4 h 15 min is 4.25 hours; 7 h 40 min is about 7.67 hours. The “in hours” line does this for you.