# Calculator Days to Seconds

## Online converter day equals to seconds

### You convert the time of days to seconds

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The number of seconds in the days - days equals to seconds

1 Day (d)
=
86400 Seconds (S)

Days
A day (symbol: «d») is a unit of time equals to 24 hours or 86,400 seconds. Officially this is a non-SI unit, but it can be used in the International System of Units. Besides the day equals to 86,400 seconds, this value is also used to determine several different spans of time based on the rotation of the Earth around its axis.

Seconds
The second (symbol: «s») is a basic unit of time in the International System of Units, it is an important value of time in the systems the centimeter-gram-second. Second is defined as duration of 9,192,631,770 periods of radiation corresponds to the transition between two hyperfine levels of basic condition of cesium-133 atom. SI prefix is often used for time measurement in fractions of a second: millisecond, microsecond and nanosecond; the measures multiples of the second which are not included in the International System of Units – minutes, hours, days, years, etc. are widely used at the moment.

### Conversion of time units

To convert from
To convert to
d
=
s
 The basic units of time Day Hour h Microsecond Millisecond Minute min Month Second s Week Year Other measures Attosecond as Century Decade Femtosecond fs Fortnight Leap Year Mean year Millennium Nanosecond Novennial Octennial Picosecond ps Quindecennial Quinquennial Septennial Shake Sidereal day Sidereal hour Sidereal year Synodic month Tropical year
 The basic units of time Day Hour h Microsecond Millisecond Minute min Month Second s Week Year Other measures Attosecond as Century Decade Femtosecond fs Fortnight Leap Year Mean year Millennium Nanosecond Novennial Octennial Picosecond ps Quindecennial Quinquennial Septennial Shake Sidereal day Sidereal hour Sidereal year Synodic month Tropical year
The conversion result: