Time Unit Converter

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Time Conversion for All Needs

Convert between various time units with precision, from microseconds to centuries. Our time converter supports all standard time units used in science, computing, and everyday life, making time calculations simple and accurate.

Common Time Conversions

  • 1 minute = 60 seconds (exact)
  • 1 hour = 60 minutes = 3,600 seconds (exact)
  • 1 day = 24 hours = 1,440 minutes = 86,400 seconds (exact)
  • 1 week = 7 days = 168 hours = 604,800 seconds (exact)
  • 1 year = 365.25 days (average) = 8,766 hours
  • 1 month = 30.436875 days (average) = 730.485 hours

Time Units and Standards

The second (s) is the SI base unit for time, defined by the cesium atom's radiation frequency:

  • Second (s): SI base unit
  • Minute (min): 60 seconds
  • Hour (h): 3,600 seconds
  • Day (d): 86,400 seconds

Understanding Time Measurements

Time is a dimension that allows events to be ordered from the past through the present into the future. It is a component of various measurements in physics, and is central to our daily lives. The measurement of time involves both extremely precise scientific applications and practical everyday units.

Precision: 15 decimal places
Standard: ISO 80000-3:2019

Time Units in Different Systems

Standard Time Units

Common time units in scientific and everyday use:

  • Nanosecond (ns): 10-9 seconds
  • Microsecond (μs): 10-6 seconds
  • Millisecond (ms): 10-3 seconds
  • Second (s): Base unit
  • Minute (min): 60 seconds
  • Hour (h): 3,600 seconds
  • Day (d): 86,400 seconds
  • Week (wk): 604,800 seconds

Longer Time Periods

Extended time units for longer periods:

  • Month: Approximately 30.436875 days (varies)
  • Year: 365.25 days (Julian year)
  • Decade: 10 years
  • Century: 100 years
  • Millennium: 1,000 years

Scientific Time Scales

Specialized scientific time measurements:

  • Planck time: Approx. 5.39×10-44 seconds (theoretical smallest time unit)
  • Attosecond (as): 10-18 seconds (used in ultrafast physics)
  • Atomic time (TAI): Based on atomic clock measurements
  • Coordinated Universal Time (UTC): The worldwide standard for civil time

Calendar Systems and Years

Different calendar systems define years slightly differently: