Feet per Second to Speed of Light Converter
Convert feet per second (ft/s) to speed of light (c), 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.
Show the working
- 1 ft/s = 1.01670336216e-9 c
- 1 × 1.01670336216e-9 = 1.01670336216e-9 c
How to convert feet per second to speed of light
1 ft/s = 1.01670336216 × 10⁻⁹ c, so multiply by 1.01670336216 to go from feet per second to speed of light. Going the other way, 1 c = 983,571,056.43 ft/s.
c = ft/s × 1.01670336216 ft/s = c × 983,571,056.43
Worked example:
1 ft/s = 1.01670336216e-9 c 5 × 1.01670336216e-9 = 5.08351681082e-9 c
Feet per Second to speed of light table
| Feet per Second | Speed of Light |
|---|---|
| 1 ft/s | 1.01670336216 × 10⁻⁹ c |
| 2 ft/s | 2.03340672433 × 10⁻⁹ c |
| 3 ft/s | 3.05011008649 × 10⁻⁹ c |
| 4 ft/s | 4.06681344866 × 10⁻⁹ c |
| 5 ft/s | 5.08351681082 × 10⁻⁹ c |
| 6 ft/s | 6.10022017298 × 10⁻⁹ c |
| 7 ft/s | 7.11692353515 × 10⁻⁹ c |
| 8 ft/s | 8.13362689731 × 10⁻⁹ c |
| 9 ft/s | 9.15033025948 × 10⁻⁹ c |
| 10 ft/s | 1.01670336216 × 10⁻⁸ c |
| 15 ft/s | 1.52505504325 × 10⁻⁸ c |
| 20 ft/s | 2.03340672433 × 10⁻⁸ c |
| 25 ft/s | 2.54175840541 × 10⁻⁸ c |
| 30 ft/s | 3.05011008649 × 10⁻⁸ c |
| 40 ft/s | 4.06681344866 × 10⁻⁸ c |
| 50 ft/s | 5.08351681082 × 10⁻⁸ c |
| 75 ft/s | 7.62527521623 × 10⁻⁸ c |
| 100 ft/s | 1.01670336216 × 10⁻⁷ c |
| 250 ft/s | 2.54175840541 × 10⁻⁷ c |
| 500 ft/s | 5.08351681082 × 10⁻⁷ c |
| 1000 ft/s | 1.01670336216 × 10⁻⁶ c |
About the units
- Feet per Second (ft/s)
- Feet per second, a US customary unit. Definition: NIST Handbook 44 (2024), Appendix C: General Tables of Units of Measurement.
- 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).