Capacity Of Pump

Capacity of a pump is the amount of liquid that a pump can displace per unit of time. If a pump is transporting  12 gallons in one minute, then it's capacity is said to be 12 gallons per minute or 12 gpm.

Fromula:  
                  Q = V/t
where,
    Q = Capacity of pump
    V = Volume of fluid
     t = Time