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Convert between Km per second and Speed of light in vacuum

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Our online tools will provide quick answers to your calculation and conversion needs. On this page, you can convert speed measurements from km per second to speed of light in vacuum and speed of light in vacuum to km per second.

Enter the value you want to convert, and leave the target field blank.

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Conversion formula

1 c = 299792.458 km/s

1 km/s = 3.3E-6 c

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