Velocity and Speed | The Units and Constants Handbook at KnowledgeDoor

	Velocity and Speed
	Velocity and Speed

Characteristic		atomic-unit-of-velocity		Notes
Characteristic		atomic-unit-of-velocity		Notes
Metric (SI) Equivalent	2.1876912636×106 meters / second
Standard Uncertainty	± 3.3×10-4 meters / second
Metric (SI) Dimensions	length × time-1

Characteristic		kilometer-per-hour		Notes
Characteristic		kilometer-per-hour		Notes
Other Name	kph
Metric (SI) Equivalent	1 kilo meter / hour			This equivalent and the one below are calculated from exact values.
Another Metric (SI) Equivalent with More Basic Units	2.7777777778 deci meters / second
Metric (SI) Dimensions	length × time-1
Description in Terms of Other Units and Constants	1000 meters / hour

Characteristic		kine		Notes
Characteristic		kine		Notes
Metric (SI) Equivalent	1 centi meter / second			This equivalent is exact.
Metric (SI) Dimensions	length × time-1

Characteristic		knot ( U.S. and international unit )		Notes
Characteristic		knot ( U.S. and international unit )		Notes
Symbol	kn
Other Names	nautical-mile-per-hour, nmph, kt
Metric (SI) Equivalent	1.852 kilo meters / hour			This equivalent and the one below are calculated from exact values.
Another Metric (SI) Equivalent with More Basic Units	5.1444444444 deci meters / second
Metric (SI) Dimensions	length × time-1
Description in Terms of Other Units and Constants	nautical-mile / hour
Unit Group	knot Group

Characteristic		knot-UK ( Used in the United Kingdom )		Notes
Characteristic		knot-UK ( Used in the United Kingdom )		Notes
Other Names	kn-UK, nautical-mile-per-hour-UK, nmph-UK, kt-UK
Metric (SI) Equivalent	1.853172 kilo meters / hour			This equivalent and the one below are exact.
Another Metric (SI) Equivalent with More Basic Units	5.1477 deci meters / second
Metric (SI) Dimensions	length × time-1
Unit Group	knot Group

Characteristic		mile-per-hour		Notes
Characteristic		mile-per-hour		Notes
Symbol	mph
Metric (SI) Equivalent	1.609344 kilo meters / hour			This equivalent and the one below are calculated from exact values.
Another Metric (SI) Equivalent with More Basic Units	4.4704 deci meters / second
Metric (SI) Dimensions	length × time-1
Description in Terms of Other Units and Constants	mile / hour

Characteristic		speed-of-light-in-vacuum		Notes
Characteristic		speed-of-light-in-vacuum		Notes
Symbol	c
Other Names	c-0, natural-unit-of-velocity
Metric (SI) Equivalent	2.99792458×108 meters / second			This equivalent is exact.
Metric (SI) Dimensions	length × time-1

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