CO₂ from pH & KH calculator

Carbonate hardness (KH)

KH unit

pH (with CO₂ on)

Water temperature

°C

TDSoptional, for activity correction

mg/L

Target CO₂

ppm

Degassed pHoptional: a sample left out 24 h

Dissolved CO₂: –
Classic shortcut: –
pH for target: –
Drop from degassed: –

Free calculator by ScapeMath. Method, worked examples and sources on the full page.