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.
Pipe flow and velocity calculator
Compare the velocity produced by the same flow through different actual internal pipe diameters. Use the calculation as a water-system learning aid rather than a substitute for a demand-sizing method.
Open tool →FREE TOOLPressure to head converter
Translate a pressure reading into an equivalent liquid column before combining it with elevation head. Use the density of the actual liquid rather than a memorised water-only rule.
Open tool →FREE TOOLFitting loss calculator
Build a transparent fitting schedule from documented K values. Separate local losses at elbows and valves from straight-pipe friction.
Open tool →FREE TOOLHot water mixing calculator
Find hot and cold proportions for an ideal plumbing mixing exercise. Check that the target temperature lies between the two supplies before calculating quantities.
Open tool →FREE TOOLPipe expansion calculator
Estimate the free movement of a pipe over a specified temperature change. Use a documented material coefficient and explain why the result alone cannot specify an anchor or expansion loop.
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 Plumber Conquer.
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.