Speed is calculated using the distance traveled and time. The formula for calculating speed is dividing the total distance by total time. Unit of speed measurements is miles per hour (Miles/Hr), kilometers per hour (KM/Hr), feet per second, and meters per second (Meter/Sec).
The https://onlinespeedometer.site/ provides a facility to measure speed in Meter/Sec, Miles/Hr, and KM/Hr.
Speed calculation example: Suppose you have reached your destination in one hour and the distance traveled is 60 kilometers; your average traveling speed was 60 kilometers/ hour.