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)
250 m/s (engineering)
In the USA and UK, the older Imperial system is used, where things are measured in feet, inches and pounds.
900 000 m/hr
820 ft/sec
3 600 secs
1.0 hrs
3.6 * 103 sec(s)
60 min(s)
1 hr(s)
900 000 meter
2.95 * 106 ft
984.25 * 103 yard
900 * 103 m
900 km
559.24 mile
485.96 nautical mile