Everyday Calculation

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Calculators » Date & Time » hh:mm:ss and decimal hour conversion

Hours minutes seconds to decimal hour converter


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 seconds (H:M:S) to decimal hours and vice-versa.

Enter time value you want to convert from:

: :

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Each hour is divided into 60 minutes, each of which is further sub-divided into 60 seconds.

hh:mm:ss to decimal hour conversion

dh = hh + mm/60 + ss/3600

Decimal hour to hh:mm:ss conversion

hh = ⌊dh⌋
mm = ⌊(dh - hh) * 60⌋
ss = ((dh - hh) * 60 - mm) * 60
dh = decimal hour
hh = hours
mm = minutes
ss = seconds

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