Time Converter
Unit definitions
Second
The second is the SI base unit of time. A second is defined as the duration of $9\,192\,631\,770$ periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom.
Millisecond
$\frac{1}{10^{3}}$ of a second is a millisecond.
Microsecond
$\frac{1}{10^{6}}$ of a second is a microsecond.
Nanosecond
$\frac{1}{10^{9}}$ of a second is a nanosecond.
Picosecond
$\frac{1}{10^{12}}$ of a second is a picosecond.
Minute
$1$ minute is equal to $60$ seconds.
Hour
$60$ minutes is an hour. $1$ hour has $3\,600$ ($60 \times 60$) seconds.
Day
A timespan of $24$ hours is a day. It is equal to $86\,400$ ($60 \times 60 \times 24$) seconds.
Week
A timespan of $7$ days is a week. It is equal to $604\,800$ ($60 \times 60 \times 24 \times 7$) seconds.
Month
A month is defined as $\frac{1}{12}$ of a year. It is exactly $30.436\,875$ days.
Year
$365.242\,5$ days is equal to a year. It is defined using the Gregorian calendar. In the this calendar, there are $365.242\,5$ days in a year, and it is the most widely used calendar in the world.
Decade
A duration of $10$ years (i.e., $365.242\,5 \times 10$ days).
Century
A duration of $100$ years (i.e., $365.242\,5 \times 100$ days).
Julian Year
A Julian year has $365.25$ days. A light year is the distance light travels in a Julian year in a vacuum.