The boat rowing speed of a person in the still water will not be same as that of the boat rowing speed in upstream and downstream water. On considering the boat speed in still water, the speed of a boat in downstream will be more and speed in upstream will be low. This page shows you the average speed of boat in upstream and downstream formula which will assist you to calculate the speed of the boat in a stream based on the inputs of speed in still water and stream speed.

Speed in Downstream (km/hr) = a + b

Speed in Upstream (km/hr) = a - b

Where,

a = Speed in Still Water (km/hr)

b = Speed of Stream (km/hr)

The average speed of boat in upstream and downstream formula is a simple formula that provides you the average speed in the stream by adding and dividing the speed of upstream and downstream found.