Runs on this device. Inputs are not uploaded or saved. Results rounded for display.
How to use it
- Measure the inputs in the units shown. Keep a note of your original recipe.
- Change the relevant input and calculate. Compare the answer with the worked example below.
- Use the output within the stated limits; reset to restore the example inputs.
Worked example
500 ml at GH160/KH80 plus 500 ml at GH0/KH0 estimates GH80/KH40.
Assumptions and limits
Assumes compatible measurements and additive volumes without precipitation. Does not establish potability, pH, corrosion or machine safety. Start with potable water and remeasure.
Questions
What does this result establish?
Each blended concentration is A × A fraction + B × B fraction. Volume splits follow that fraction. It provides the stated arithmetic or random ordering; it is not a taste or equipment certification.
What measurements should I use?
Total blend volume (ml); Water A proportion (%); Water A total hardness (ppm as CaCO3); Water A alkalinity (ppm as CaCO3); Water B total hardness (ppm as CaCO3); Water B alkalinity (ppm as CaCO3). Keep the units consistent rather than copying a number from a differently labelled recipe.
Why is an input rejected?
Blank, non-finite, negative or out-of-domain measurements cannot produce a valid answer. Each field has a bounded range. Incompatible combinations show an explanation instead of retaining a previous result.
Can I use this without an account?
Yes. Once this page and its modules load, the calculation runs locally without accounts, external APIs or input storage. Reloading restores the defaults.
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