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.
250 m/s
2.5 * 102 m/s (scientific)
249.99 m/s (engineering)
In the USA and UK, the older Imperial system is used, where things are measured in feet, inches and pounds.
899 982 m/hr
820 ft/sec
1.00 secs
1 sec
1 sec(s)
250 meter
249.99 * 103 mm
25 * 103 cm
9.84 * 103 in
820.19 ft
273.4 yard
249.99 m
249.99 * 10-3 km
155.34 * 10-3 mile
134.99 * 10-3 nautical mile