# ››Convert second to second

 seconds second

How many seconds in 1 second? The answer is 1.
We assume you are converting between second and second.
You can view more details on each measurement unit:
seconds or second
The SI base unit for time is the second.
1 second is equal to 1 second.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between seconds and seconds.
Type in your own numbers in the form to convert the units!

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# ››Definition: Second

The second (symbol s) is a unit for time, and one of seven SI base units. It 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 at zero kelvins.

# ››Definition: Second

The second (symbol s) is a unit for time, and one of seven SI base units. It 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 at zero kelvins.

# ››Metric conversions and more

ConvertUnits.com provides an online conversion calculator for all types of measurement units. You can find metric conversion tables for SI units, as well as English units, currency, and other data. Type in unit symbols, abbreviations, or full names for units of length, area, mass, pressure, and other types. Examples include mm, inch, 100 kg, US fluid ounce, 6'3", 10 stone 4, cubic cm, metres squared, grams, moles, feet per second, and many more!