Tools you might need next
Calculate water or coffee dose using standard brew ratios (typically 1:15 to 1:18). Free online coffee and barista calculator with instant, accurate results.
Calculate extraction yield from refractometer TDS (SCA standard formula). Free online coffee and barista calculator with instant, accurate results.
Recommended water temperature by brew method with altitude adjustment. Free online coffee and barista calculator with instant, accurate results.
This tool applies a standard formula from the relevant domain. The computation is deterministic — given the same inputs, the result is always identical. The formula accounts for the primary variables that determine the output.
Total Hardness (ppm) = CaCO₃ eq.; SCA target 17–85 ppmThe calculation requires: Calcium (mg/L as Ca), Magnesium (mg/L as Mg), Bicarbonate (mg/L as HCO₃). Each parameter contributes to the final result according to the formula above. Accuracy depends on the precision of your input measurements.
Updated: July 2026
A typical use case demonstrating the calculator with representative values.
→ Calculated result based on the formula and provided inputs
Enter your own values to get a personalized result for your specific situation.
→ Result calculated from your specific input values
Check the expected unit for each input field (shown as suffix). Converting between imperial and metric units before entering values prevents calculation errors.
When a formula combines multiple measurements, all inputs must use compatible units. Convert everything to the same system (metric or imperial) before calculating.
Calculate and assess brew water mineral content for coffee extraction. Free online coffee and barista calculator with instant, accurate results. It applies the calculation formula (Total Hardness (ppm) = CaCO₃ eq.; SCA target 17–85 ppm). For example: sca-like water profile — A typical use case demonstrating the calculator with representative values.