Enter the rate at which water can be pumped and the time into the calculator to determine the well capacity. This calculator can also evaluate any of the variables given the others are known.

Well Capacity Formula

The following formula is used to calculate the well capacity.

WC = R * T

Variables:

  • WC is the well capacity (gallons)
  • R is the rate at which water can be pumped from the well (gallons per minute)
  • T is the time over which the well can supply water (minutes)

To calculate the well capacity, multiply the rate at which water can be pumped from the well by the time over which the well can supply water. This will give the total amount of water that the well can supply over a certain period of time.

What is a Well Capacity?

Well capacity refers to the amount of water that a well can supply over a certain period of time. It is determined by the rate at which water can be pumped from the well and the amount of water available in the underground aquifer. The capacity can be affected by factors such as the size and depth of the well, the type of soil or rock in the area, and the level of the water table. It is an important factor to consider in water management and planning, especially in areas where water supply is limited.

How to Calculate Well Capacity?

The following steps outline how to calculate the Well Capacity.


  1. First, determine the rate at which water can be pumped from the well (R) in gallons per minute.
  2. Next, determine the time over which the well can supply water (T) in minutes.
  3. Next, gather the formula from above = WC = R * T.
  4. Finally, calculate the Well Capacity (WC) in gallons.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

rate at which water can be pumped from the well (R) = 10 gallons per minute

time over which the well can supply water (T) = 20 minutes