Cool Conversions -- Speed --

Brisk walking 3.7 mph 6 kph

Man swimming 5.19 mph 8.2 kph

Roller skating 25 mph 40.2 kph

Man running 27 mph 43.4 kph

Ostrich running 30 mph 48.2 kph

Dolphin swimming 37 mph 59.5 kph

Tank 45 mph 72.4 kph

Pigeon flying 60 mph 96.5 kph

Cheetah running 70 mph 112.6 kph

Fastest electric train 106 mph 170.5 kph

Boeing 707 604 mph 972 kph

Concorde 1,450 mph 2,333.5 kph

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