Second

s

Commonly Used Scientific Unit

The second is the SI base unit of time, precisely defined in modern physics using atomic cesium. It's the fundamental unit for all time measurements in science and engineering.

Quick Converter

1 s = s

Controls display format. Very small or very large numbers will be shown in scientific notation (e.g., 1.5e-6).

Second (s)

The second is the SI base unit of time, precisely defined in modern physics using atomic cesium. It’s the fundamental unit for all time measurements in science and engineering.

Characteristics

  • SI base unit of time
  • Modern definition: based on cesium-133 oscillation frequency
  • Universal standard: same everywhere on Earth and in space
  • Common in: all scientific measurements, computer time, digital systems

Conversions

  • 1 s = 1000 ms
  • 1 s = 1,000,000 µs
  • 1 s = 1,000,000,000 ns
  • 1 s = 1/60 minute
  • 1 s = 1/3600 hour
  • 60 s = 1 minute

Related Units

Used In Regions

International Worldwide
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