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Speed of Light to Meters per Second Converter

Convert speed of light (c) to meters per second (m/s), with the formula, a conversion table and exact factors.

Change the values and press Calculate to work out your own figures.

Enter a speed, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.

About valueA number, fraction (3/8), mixed number (1 1/2), scientific notation (2.5e6) or a simple sum such as 2*3.
About toThe unit you want the answer in. Swap exchanges the two units.
Result
Result
299,792,458 m/s
knots
582,749,918.359 kn
Mach (at 343 m/s)
874,030.489796 Mach
miles per hour
670,616,629.384 mph
feet per second
983,571,056.43 ft/s
kilometers per second
299,792.458 km/s
kilometers per hour
1,079,252,848.8 km/h
centimeters per second
29,979,245,800 cm/s

1 c = 299,792,458 m/s

Show the working
  1. 1 c = 299792458 m/s
  2. 1 × 299792458 = 299792458 m/s

How to convert speed of light to meters per second

1 c = 299,792,458 m/s, so multiply by 299,792,458 to go from speed of light to meters per second. Going the other way, 1 m/s = 3.33564095198 × 10⁻⁹ c.

m/s = c × 299,792,458
c = m/s × 3.33564095198

Worked example:

1 c = 299792458 m/s
5 × 299792458 = 1498962290 m/s

Speed of Light to meters per second table

Speed of LightMeters per Second
1 c299,792,458 m/s
2 c599,584,916 m/s
3 c899,377,374 m/s
4 c1,199,169,832 m/s
5 c1,498,962,290 m/s
6 c1,798,754,748 m/s
7 c2,098,547,206 m/s
8 c2,398,339,664 m/s
9 c2,698,132,122 m/s
10 c2,997,924,580 m/s
15 c4,496,886,870 m/s
20 c5,995,849,160 m/s
25 c7,494,811,450 m/s
30 c8,993,773,740 m/s
40 c11,991,698,320 m/s
50 c14,989,622,900 m/s
75 c22,484,434,350 m/s
100 c29,979,245,800 m/s
250 c74,948,114,500 m/s
500 c149,896,229,000 m/s
1000 c299,792,458,000 m/s

About the units

Speed of Light (c)
Speed of light, a specialised unit. Definition: BIPM SI Brochure, 9th edition (SI units, prefixes and units accepted for use with the SI).
Meters per Second (m/s)
Meters per second, a metric unit. Definition: BIPM SI Brochure, 9th edition (SI units, prefixes and units accepted for use with the SI).

Formula version 0.1.0Reviewed