MOTION
Speed
Linear speed for travel, wind and physics.
Try a decimal, 1e-9, 1/3, or 5 1/2.
Result0.00000333564 c1 km/s = 0.00000333564 c
EVERYDAY · ENGINEERING · SCIENCE
km/s to c Converter
Convert kilometre per second (km/s) to speed of light in vacuum (c). Enter a value for an instant result, or use the examples and reverse conversion below.
520units ready to convert
HOW IT IS CALCULATED
Convert through metre per second
Enter a kilometre per second value to calculate speed of light in vacuum with full internal precision before display rounding.
Display PrecisionAuto · 6 significant digits
Auto trims unnecessary zeroes and uses scientific notation for extreme magnitudes. Use Digits to set the display precision; calculations retain full precision.
QUICK REFERENCE
All units in this quantity
| Unit | Symbol | Converted value |
|---|---|---|
| metre per secondfrom km/s | m/s | 1000 |
| centimetre per secondfrom km/s | cm/s | 100000 |
| foot per secondfrom km/s | ft/s | 3280.84 |
| kilometre per hourfrom km/s | km/h | 3600 |
| mile per hourfrom km/s | mph | 2236.94 |
| knotfrom km/s | kn | 1943.84 |
| kilometre per secondfrom km/s | km/s | 1 |
| speed of light in vacuumfrom km/s | c | 0.00000333564 |
SI symbols follow international notation. U.S. and Imperial measures are labelled separately where their values differ.
km/s to c Conversion Reference
Kilometre Per Second (km/s) and speed of light in vacuum (c) are units of speed. Use this page to convert in either direction.
Conversion Examples
| Kilometre Per Second (km/s) | Speed Of Light In Vacuum (c) |
|---|---|
| 1 km/s | 0.00000333564 c |
| 5 km/s | 0.0000166782 c |
| 10 km/s | 0.0000333564 c |
| 100 km/s | 0.000333564 c |
Examples are rounded to 6 significant digits. The interactive converter retains full calculation precision; change Display Precision to see more digits.
Reverse Conversion
c to km/s (speed of light in vacuum to kilometre per second)
Related Speed Conversions
km/s to m/s (kilometre per second to metre per second)km/s to cm/s (kilometre per second to centimetre per second)km/s to ft/s (kilometre per second to foot per second)km/s to km/h (kilometre per second to kilometre per hour)km/s to mph (kilometre per second to mile per hour)km/s to kn (kilometre per second to knot)