MOTION
Speed
Linear speed for travel, wind and physics.
Try a decimal, 1e-9, 1/3, or 5 1/2.
Result0.000514444 km/s1 kn = 0.000514444 km/s
EVERYDAY · ENGINEERING · SCIENCE
kn to km/s Converter
Convert knot (kn) to kilometre per second (km/s). 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 knot value to calculate kilometre per second 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 kn | m/s | 0.514444 |
| centimetre per secondfrom kn | cm/s | 51.4444 |
| foot per secondfrom kn | ft/s | 1.68781 |
| kilometre per hourfrom kn | km/h | 1.852 |
| mile per hourfrom kn | mph | 1.15078 |
| knotfrom kn | kn | 1 |
| kilometre per secondfrom kn | km/s | 0.000514444 |
| speed of light in vacuumfrom kn | c | 0.000000001716 |
SI symbols follow international notation. U.S. and Imperial measures are labelled separately where their values differ.
kn to km/s Conversion Reference
Knot (kn) and kilometre per second (km/s) are units of speed. Use this page to convert in either direction.
Conversion Examples
| Knot (kn) | Kilometre Per Second (km/s) |
|---|---|
| 1 kn | 0.000514444 km/s |
| 5 kn | 0.00257222 km/s |
| 10 kn | 0.00514444 km/s |
| 100 kn | 0.0514444 km/s |
Examples are rounded to 6 significant digits. The interactive converter retains full calculation precision; change Display Precision to see more digits.
Reverse Conversion
km/s to kn (kilometre per second to knot)