Lockheed SR-71 Blackbird: 3530 km/hr
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.
981 m/s
9.81 * 102 m/s (scientific)
980.56 m/s (engineering)
In the USA and UK, the older Imperial system is used, where things are measured in feet, inches and pounds.
3 530 000 m/hr
3 217 ft/sec
3 600 secs
1.0 hrs
3.6 * 103 sec(s)
60 min(s)
1 hr(s)
3 530 000 meter
3.86 * 106 yard
3.53 * 106 m
3.53 * 103 km
2.19 * 103 mile
1.91 * 103 nautical mile