Free calculators and unit converters for general and everyday use.
Calculators » Date & Time » Decimal Time Conversion
Our online tools will provide quick answers to your calculation and conversion needs. On this page, you can convert time values specified in hours, minutes and seconds to decimal hours and vice-versa.
Download: Use this time converter offline with our all-in-one calculator app for Android and iOS.
Each hour is divided into 60 minutes, each of which is further sub-divided into 60 seconds.
Hours and minutes to Decimal conversion
dh = hh + mm/60 + ss/3600
Decimal to hours and minutes conversion
hh = ⌊dh⌋
mm = ⌊(dh - hh) * 60⌋
ss = ((dh - hh) * 60 - mm) * 60
dh = decimal hour
hh = hours
mm = minutes
ss = seconds