0.51 km per second = 1,140.84 mph
7.5 kilometers per second = 16,777.02 mph
Mercury - 47.8725 km/sec = 107,000MPH Venus - 35.0214 km/sec = 78,350 MPH Earth - 29.7859 km/sec = 66,630 MPH Mars - 24.1309 km/sec = 54,000 MPH Jupiter - 13.0697 km/sec =29,240 MPH Saturn - 9.6724 km/sec = 21,640 MPH Uranus - 6.8352 km/sec = 15,290 MPH Neptune - 5.4778 km/sec = 12,250 MPH Pluto (TNO, or dwarf planet) = 10,700 MPH
7 meters per second is 25.2 km/h
30 km per hour is equivalent to approximately 18.64 miles per hour.
Here it is:mph x 0.000447 = km per second
600km per second = 1,342,161.78 mph
14 kph = 12.76 feet per second
9000 km/h is approximately equal to 5592 mph when converted using the conversion factor 1 km/h = 0.621371192 mph.
54 km per second is equal to 120,794.56 mph
2 km/s is about 4,473.9 mph
2.2 meters per second = About 5 mph (4.92125984)