Useful answers.
Understand the working.
Calculators and worksheets for the subjects you study and the problems you meet in practice. Work through an example, try your own values, then test the same ideas in exam practice.
Well volume calculator
Estimate water stored inside a cylindrical casing from actual internal dimensions. Distinguish the water column already present from the aquifer ability to replenish it.
Open tool →FREE TOOLDrawdown and specific capacity calculator
Measure static and pumping depths from one reference datum. Use drawdown and test flow to describe specific capacity without claiming a sustainable yield.
Open tool →FREE TOOLTotal dynamic head worksheet
Build head from the pumping water level to the discharge condition. Avoid counting drawdown twice after a pumping level has already been supplied.
Open tool →FREE TOOLTimed volume flow calculator
Calculate a field collection flow from a known container volume and representative fill time. Make the minutes-to-seconds conversion visible.
Open tool →FREE TOOLPumping and recovery log
Keep timed pumping and post-stop recovery measurements on a common datum. Plot the observed response without fitting an unsupported aquifer model.
Open tool →Tools that connect the calculation to the concept
Each tool shows its method, units and assumptions, together with two worked examples. Example values are for learning; replace them with your own measurements or documented inputs. The related study links take you to the matching certification topic on Well Contractor Exam.
Worksheets run in your browser. We do not send entered measurements or report text to a calculation service. Where export is available, you choose when to save the file locally.
Check the boundary of the answer
A useful result starts with the right inputs and an appropriate method. These tools explain what is calculated and what the method leaves out. User-supplied criteria remain identified as supplied criteria; a calculation does not automatically approve equipment, certify an inspection or establish regulatory compliance.