Time Converter
Measure the duration of events and the intervals between them.
Converting...
Unit Information
Second (s)
Definition: The SI base unit of time.
History: Originally defined as 1/86400 of a day, now defined by atomic transitions.
Current Use: Universal unit of time measurement.
Millisecond (ms)
Definition: A unit of time equal to one thousandth of a second.
History: Became important with precision timing needs.
Current Use: Used in computing and precise timing applications.
Microsecond (μs)
Definition: A unit of time equal to one millionth of a second.
History: Used in high-precision timing applications.
Current Use: Used in electronics and computer systems.
Nanosecond (ns)
Definition: A unit of time equal to one billionth of a second.
History: Became relevant with modern electronics.
Current Use: Used in computer processors and high-speed electronics.
Minute (min)
Definition: A unit of time equal to 60 seconds.
History: Derived from ancient Babylonian base-60 number system.
Current Use: Commonly used for everyday time measurements.
Hour (h)
Definition: A unit of time equal to 60 minutes or 3600 seconds.
History: Ancient unit, originally 1/24 of a day.
Current Use: Standard unit for daily time measurements.
Day (d)
Definition: A unit of time equal to 24 hours.
History: Based on Earth's rotation period.
Current Use: Fundamental unit for calendar systems.
All Unit Conversions
Did you know?
- The second is defined by atomic vibrations of cesium-133 atoms.
- A solar day is about 4 minutes longer than a sidereal day.
- Leap years occur every 4 years to compensate for the extra quarter day in a solar year.
Related Categories
Common Conversions
Convert Hours to Minutes
hr * 60
Convert Days to Seconds
day * 86400