Advanced Tool
Carbonation Calculator
Dial in your second fermentation. Estimate pressure, timing, and bottle bomb risk for ginger bug soda, kombucha, and water kefir. Know when to burp before things get exciting.
10g/L
0g (none)15g (moderate)30g (max)
72°F
60°F (cool)72°F (room temp)85°F (warm)
Est. 2nd Fermentation Time
72
hours
Pressure & Risk
Pressure estimate~1.2 PSI
Bottle bomb riskLow
Burp Schedule
Once daily is sufficient. Check at 24-hour intervals.
Always open bottles slowly, pointed away from your face. A towel over the cap is wise.
Chemist's note
Glass flip-top bottles (Grolsch-style) are rated for ~6 PSI but can fail unpredictably. Plastic soda bottles let you squeeze-test carbonation — when the bottle is rock hard, it's ready. For glass, always refrigerate once carbonated. Cold slows fermentation and reduces CO₂ solubility pressure. Never leave high-sugar 2F bottles at room temp for more than 3 days.