MOTION
Speed
Linear speed for travel, wind and physics.
Try a decimal, 1e-9, 1/3, or 5 1/2.
Result0.00044704 km/s1 mph = 0.00044704 km/s
EVERYDAY · ENGINEERING · SCIENCE
mph to km/s Converter
Convert mile per hour (mph) 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 mile per hour 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 mph | m/s | 0.44704 |
| centimetre per secondfrom mph | cm/s | 44.704 |
| foot per secondfrom mph | ft/s | 1.46667 |
| kilometre per hourfrom mph | km/h | 1.60934 |
| mile per hourfrom mph | mph | 1 |
| knotfrom mph | kn | 0.868976 |
| kilometre per secondfrom mph | km/s | 0.00044704 |
| speed of light in vacuumfrom mph | c | 0.00000000149116 |
SI symbols follow international notation. U.S. and Imperial measures are labelled separately where their values differ.
mph to km/s Conversion Reference
Mile Per Hour (mph) and kilometre per second (km/s) are units of speed. Use this page to convert in either direction.
Conversion Examples
| Mile Per Hour (mph) | Kilometre Per Second (km/s) |
|---|---|
| 1 mph | 0.00044704 km/s |
| 5 mph | 0.0022352 km/s |
| 10 mph | 0.0044704 km/s |
| 100 mph | 0.044704 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 mph (kilometre per second to mile per hour)