This calculator helps you estimate the distance travelled after a certain time of constant speed. It also converts to alternative speed units: mile/hr, km/h, m/s, mach, ...
Most countries use the Metric System, which uses the measuring units such as meters and grams and adds prefixes like kilo, milli and centi to count orders of magnitude.
13.8 m/s
1.38 * 101 m/s (scientific)
13.79 m/s (engineering)
In the USA and UK, the older Imperial system is used, where things are measured in feet, inches and pounds.
49 644 m/hr
45.2 ft/sec
1.00 secs
1 sec
1 sec(s)
13.8 meter
13.79 * 103 mm
1.38 * 103 cm
542.91 in
45.24 ft
15.08 yard
13.79 m
13.79 * 10-3 km