21 Kilometers per Hour to Kilometers per Second
Convert 21 kilometers per hour (km/h) to kilometers per second (km/s) with formulas, examples, and conversion tables.
km/h
km/s
21 km/h = 0.005833 km/s
Full precision:0.0058333 km/s
Step-by-Step Solution
To convert 21 kilometers per hour to kilometers per second, we divide by 3600 because one kilometer per second equals exactly 3600 kilometers per hour.
1 kilometer per second = 3600 kilometers per hour
Since there are 3600 kilometers per hour in every kilometer per second, we divide our value by this factor:
21 ÷ 3600 = 0.005833 kilometers per second
So 21 kilometers per hour = 0.005833 kilometers per second.
Quick check: 0.005833 × 3600 = 21 kilometers per hour
Kilometers per Hour to Kilometers per Second Conversion Table
| Kilometers per Hour | Kilometers per Second |
|---|---|
| 1 km/h | 0.000278 km/s |
| 2 km/h | 0.000556 km/s |
| 3 km/h | 0.000833 km/s |
| 4 km/h | 0.001111 km/s |
| 5 km/h | 0.001389 km/s |
| 10 km/h | 0.002778 km/s |
| 20 km/h | 0.005556 km/s |
| 21 km/h | 0.005833 km/s |
| 50 km/h | 0.013889 km/s |
| 100 km/h | 0.027778 km/s |
21 Kilometers per Hour in Other Units
| Unit | 21 km/h = |
|---|---|
| km/h to m/s | 5.8333 m/s |
| Kilometers per Hour to Centimeters per Second | 583.334 cm/s |
| km/h to mph | 13.0488 mph |
| km/h to ft/s | 19.1382 ft/s |
| Kilometers per Hour to Inches per Second | 229.659 in/s |
| km/h to Knots | 11.3391 kn |
| km/h to Mach | 0.017142 Mach |
| Kilometers per Hour to Speed of Light | 1.9458e-8 c |
| Kilometers per Hour to Kilometers per Second | 0.0058333 km/s |