Speed Of Light to Feet Per Second Conversion

Enter the speed in speed of light below to get the value converted to feet per second.

Results in Feet Per Second:
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1 c = 983,571,056.43045 ft/s

How to Convert Speed Of Light to Feet Per Second

Speedometers are used in vehicles to measure speed

To convert a speed of light measurement to a foot per second measurement, multiply the speed by the conversion ratio.

Since one speed of light is equal to 983,571,056.43045 feet per second, you can use this simple formula to convert:

feet per second = speed of light × 983,571,056.43045

The speed in feet per second is equal to the speed of light multiplied by 983,571,056.43045.

For example, here's how to convert 5 speed of light to feet per second using the formula above.
5 c = (5 × 983,571,056.43045) = 4,917,855,282.1522 ft/s

Speed of light and feet per second are both units used to measure speed. Keep reading to learn more about each unit of measure.

Speed Of Light

The speed of light is equal to exactly 299,792,458 meters per second, or 670,616,629 miles per hour. The definition of the speed of light is actually derived from the most recent 1983 international definition of the meter.[1]

Speed of light can be abbreviated as c; for example, 1 speed of light can be written as 1 c.

Feet Per Second

Feet per second are a measurement of speed expressing the distance traveled in feet in one second.

The foot per second is a US customary and imperial unit of speed. Feet per second can be abbreviated as ft/s, and are also sometimes abbreviated as ft/sec or fps. For example, 1 foot per second can be written as 1 ft/s, 1 ft/sec, or 1 fps.

In formal expressions, the slash, or solidus (/), is used to separate units used to indicate division in an expression.[2]

Feet per second can be expressed using the formula:
vft/s = dfttsec

The velocity in feet per second is equal to the distance in feet divided by time in seconds.

Speed Of Light to Foot Per Second Conversion Table

Speed of light measurements converted to feet per second
Speed Of Light Feet Per Second
0.00000001 c 9.8357 ft/s
0.00000002 c 19.67 ft/s
0.00000003 c 29.51 ft/s
0.00000004 c 39.34 ft/s
0.00000005 c 49.18 ft/s
0.00000006 c 59.01 ft/s
0.00000007 c 68.85 ft/s
0.00000008 c 78.69 ft/s
0.00000009 c 88.52 ft/s
0.000000001 c 0.983571 ft/s
0.00000001 c 9.8357 ft/s
0.0000001 c 98.36 ft/s
0.000001 c 983.57 ft/s
0.00001 c 9,836 ft/s
0.0001 c 98,357 ft/s
0.001 c 983,571 ft/s
0.01 c 9,835,711 ft/s
0.1 c 98,357,106 ft/s
1 c 983,571,056 ft/s


  1. National Institute of Standards and Technology, SI Redefinition: Meter, https://www.nist.gov/si-redefinition/meter
  2. National Institute of Standards and Technology, NIST Guide to the SI, Chapter 6: Rules and Style Conventions for Printing and Using Units, https://www.nist.gov/pml/special-publication-811/nist-guide-si-chapter-6-rules-and-style-conventions-printing-and-using