Choose a tool for your task
A collection of practical calculators and converters for plumbers and water filter service technicians. Choose a tool and go to a dedicated page with calculations and a description of how to use it.
Available tools: 8 / 8
Pipe thread calculator
Compare diameter and pitch for BSPP (G) and NPT. Verify the standard before selecting a fitting.
Inch to cm converter
Converts the international length inch and accepts decimals, fractions and mixed numbers.
Water usage calculator
Estimate monthly and yearly use from explicit, editable inputs.
Water softener sizing
Estimate the minimum resin volume from household water use and hardness.
Water hardness converter
Convert between °dH, mg/L and ppm as CaCO₃.
RO membrane - GPD
Convert GPD to litres and view a simplified temperature and feed-pressure correction.
Salt consumption calculator
Estimate regeneration frequency and salt demand for a water softener.
Flow calculator
Convert instantaneous flow and estimate the scale of bottled-water spending.
About the toolbox
The toolbox is a starting page for installers, plumbers and water filter service technicians.
How to use it:
- search for a tool by keyword (e.g. thread, RO, hardness)
- open the tool page and perform the calculations
- use the result for component selection or service.