Here you can convert units like scientific year, second, millisecond, microsecond, etc. within the time category.
Only numbers are allowed. Use the selected decimal separator.
Only numbers are allowed. Use the selected decimal separator.
Edit any value and every other unit updates instantly.
| Unit | Value | Actions |
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scientific year
a
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millisecond
ms
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microsecond
µs
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nanosecond
ns
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| Unit | Value | Actions |
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anomalistic year
365.2596 days.
Read more
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sidereal year
a
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stellar year
a
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tropical year
a
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The SI base unit of time. Defined by atomic transitions.
The second (symbol: s) is the base unit of time in the International System of Units (SI). Since 1967, it has been defined by the fixed numerical value of the cesium frequency, the unperturbed ground-state hyperfine transition frequency of the cesium-133 atom.
Exactly 365.25 days. Used in astronomy.
A Julian year (symbol: a) is a unit of measurement of time defined as exactly 365.25 days of 86,400 SI seconds each. It is the standard unit used by astronomers to define the light-year.
Standard calendar year, 365.2425 days.
The Gregorian year is the average length of the year in the Gregorian calendar. It is exactly 365.2425 days, accounting for leap year rules where years divisible by 100 are not leap years unless they are also divisible by 400.
Exactly 86,400 seconds.
A day is a unit of time defined as exactly 86,400 seconds. It is accepted for use with the SI, although the actual rotation of the Earth can vary slightly (monitored via leap seconds).
60 minutes or 3,600 seconds.
The hour (symbol: h) is a unit of time equal to 60 minutes, or 3,600 seconds. It is a non-SI unit accepted for use with the SI units.
60 seconds.
The minute is a unit of time equal to 60 seconds. It is a non-SI unit accepted for use with the SI units.
365.2596 days.
An anomalistic year is the time it takes Earth to travel from its closest point to the Sun (perihelion) and back to perihelion again, lasting approximately 365.2596 days (or 365 days, 6 hours, 13 minutes, 53 seconds). This period is slightly longer than other year definitions (like the tropical year or sidereal year) because the Earth's elliptical orbit slowly shifts, a phenomenon called apsidal precession, causing the perihelion point to move eastward.
