- miles / hour to kilometers / hour (mph to km/h) converter
- 1 mile / hour (mph) is equal 1.609344 kilometers / hour (km/h) use this converter

- kilometers / hour to miles / hour (km/h to mph) converter
- 1 kilometer / hour (km/h) is equal 0.62137119223733 mile / hour (mph) use this converter

- kilometers / hour to meters / second (km/h to m/s) converter
- 1 kilometer / hour (km/h) is equal 0.27777777777778 meter / second (m/s) use this converter

- meters / second to kilometers / hour (m/s to km/h) converter
- 1 meter / second (m/s) is equal 3.6 kilometers / hour (km/h) use this converter

- mach to speed of light converter
- 1 mach (at std. atm.) (M) is equal 1.1441248465297E-6 speed of light use this converter

- speed of light to mach converter
- 1 speed of light is equal 874030.48979591 mach (M) use this converter

- speed of light to speed of sound (at std. atm.) converter
- 1 speed of light is equal 874030.48979591 speed of sound (at std. atm.) use this converter

- speed of sound (at std. atm.) to speed of light converter
- 1 speed of sound (at std. atm.) is equal 1.1441248465297E-6 speed of light use this converter

- speed of sound (at std. atm.) to mach converter
- 1 speed of sound (at std. atm.) is equal 1 mach (at std. atm.) (M) use this converter

- mach to speed of sound (at std. atm.) converter
- 1 mach (at std. atm.) (M) is equal 1 speed of sound (at std. atm.) use this converter

Speed - a term that may mean two things; either the rate of changes through time, or a physical quantity that basically describes the rate at which an object covers distance.

Speed formula:

v = | d |

t |

Where: d - distance t - time |

centimeter / second (cm/s), foot / second (ft/s), kilometer / hour (km/h), kilometer / minute (km/min), kilometer / second (km/s), knot (kn), mach (at std. atm.) (M), meter / minute (m/min), meter / second (m/s), mile / hour (mph), speed of light, speed of sound (at std. atm.), yard / second

This Unit Conversion program uses custom rounding routines to avoid results such as 3.9999999999 instead of 4. It rounds the result to 13 significant digits instead of rounding to some number of decimal places, therefore producing superior results for very big or very small initial values and conversion factors. It accepts scientific notation and converts immediately.