Velocity calculator: Speed of light in vacuum: 1079252849 km/hr

This calculator helps you estimate the distance travelled after a certain time of constant speed. It also converts to alternative speed units: mile/hr, km/h, m/s, mach, ...

Speed

METRIC (DECIMAL)

Most countries use the Metric System, which uses the measuring units such as meters and grams and adds prefixes like kilo, milli and centi to count orders of magnitude.

  • Speed = 299 792 458 m/s
  • Speed = 3 * 108 m/s (scientific)
  • Speed = 299.79 * 106 m/s (engineering)
    • IMPERIAL

    In the USA and UK, the older Imperial system is used, where things are measured in feet, inches and pounds.

  • Speed = 1 079 252 848 800 m/hr
  • Speed = 983 571 056 ft/sec

    • Time

  • Time = 1.00 secs = 1 sec
  • = 1 sec(s)

    • Speed x Time = Distance

  • Distance = 299 792 458 meter
  • = 299.79 * 103 km
  • = 186.28 * 103 mile
  • = 161.87 * 103 nautical mile

    • Examples

  • Car driving 24 hours at 120 km/h = 2880 km
  • 1 year x speed of light = 1 light-year
  • Garden snail on the move for 24h = 1.12 km
  • Cheetah at top speed for 30 seconds = 993 m
  • Koenigsegg CCR at 242 mph for 1 minute = 6.49 km
  • Usain Bolt at 10.44 m/s for 9.58 secs = 100 m

    • References

  • Astronomy: light-year - parsec