Choose which Speed conversion page to view
Common Speed Conversions A few of the more common speed and velocity units. Such as miles/hour (mph), kilometers/hour (kph), meters/second, etc. This is a good place to start.
All Speed Conversions Over 65 different speed and velocity units. This is a bit more confusing, but necessary if you are unable to find the unit you need in the above conversion page.
It may come in handy.