Enter your beverage type, temperature, and desired carbonation — get exact PSI, CO₂ volumes, estimated carbonation time, and method recommendations. Based on Henry's Law CO₂ solubility equations.
This calculator uses Henry's Law to determine the relationship between CO₂ pressure, temperature, and dissolved gas concentration. Henry's Law states that at a fixed temperature, the concentration of a dissolved gas is proportional to the partial pressure of that gas above the liquid.
The CO₂ solubility constant (kH) varies with temperature. As temperature decreases, kH increases — meaning more CO₂ dissolves at the same pressure. The relationship follows an approximately exponential curve, which is why the temperature effect is so dramatic (roughly doubling between 68°F and 38°F).
The equation used: PSI = (CO₂ volumes / kH(T)) × 14.696 - 14.696 where kH(T) is the Henry's Law constant at temperature T in Kelvin, derived from the Van't Hoff equation for CO₂ solubility.
Results are for guidance — real-world carbonation is affected by dissolved minerals in water, liquid composition, headspace volume, and equipment calibration. See our full guide to how carbonation works for a deeper dive.
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