Convert hours, minutes, and seconds to decimal hours, or convert a decimal value back to a duration.
How to use this calculator
Choose a conversion direction. In duration mode use 0–59 for minutes and seconds. Both directions support 0–10,000 hours. Decimal input supports up to six places.
Example. 1 h 45 min equals 1.75 hours. In reverse, 1.30 decimal hours equals 1 h 18 min.
Minutes are counted in sixtieths of an hour. The decimal display rounds to two places; reverse conversion rounds to the nearest whole second.