Time from Distance in Kilo and Speed in Feet per Second

Calculate the time it takes to ride, walk, swim, or run a certain distance in kilometres based on a speed in feet per second.

Formula

time = distance ÷ speed

Conversions

one kilometre (km) = 0.621371192237334 miles (mi)
one kilometre (km) = 3280.83989501312 feet (ft)
one hour (hr) = 3600 seconds (sec)
one foot per second (ft/sec) = 0.3048 metres per second (m/sec)

Example Calculation

How long will it take to run 10 kilometres at a speed of 4 feet per second?

First, convert the 10 kilometres to a distance in feet;

3280.83989501312 * 10 = 32808.3989501312

10 kilometres equal 32808.4 feet

Divide the distance of 32808.4 feet by the speed of 4 feet per second to get the time in seconds;

32808.4 ÷ 4 = 8202.0997375328

It will take 8202.1 seconds to travel the 10 kilometres at a speed of 4 feet per second.

Convert to decimal hours by dividing by 3600 ( there are 3600 seconds in one hour);

8202.1 ÷ 3600 = 2.2783610382035555555555555555556

The time in hours equals 2.27836 hr. 
2 hr - 16 min - 42 sec