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Calculate sourdough starter feeding ratios by weight. Scale flour, water, and starter amounts for 1:1:1, 1:2:2, or custom refresh schedules.
Calculate salt brine concentration by weight for meat curing, pickling, and fermentation. Convert between percent salinity, grams salt, and water volume.
Estimate meat smoking time from weight, smoker temperature, and cut type. Plan cook duration for brisket, pork shoulder, ribs, and whole poultry.
Fermentation rate roughly doubles for every 10°F (5.5°C) increase in temperature. Base times are calibrated at 75°F for bread dough and 68°F for vegetable ferments.
Adjusted time = Base time × 2^((75 − T) / 10)Higher salt slows fermentation. Bread dough at 2.5% salt ferments ~15% slower than 1.8% salt. Vegetable ferments above 3% salt take noticeably longer to acidify.
Active sourdough starter at peak reduces bulk ferment by 20–30% vs sluggish starter. Kimchi with fresh ginger and active lactobacilli acidifies faster than mild cabbage-only ferments.
Updated: July 2026
75% hydration dough with active starter at 78°F: bulk ferment ~3–4 hours to 50% volume increase. At 68°F, same dough needs 5–7 hours.
Shredded cabbage with 2.5% salt ferments to pleasant tang in 5–7 days at 68°F. At 55°F in a cellar, expect 3–4 weeks for similar acidity.
Packed kimchi at 70°F with 2% salt: active fermentation 1–3 days at room temp, then move to fridge to slow. Taste daily after day 2.
A recipe's "4 hour bulk ferment" assumes ~75°F. At 65°F, allow 6–8 hours. At 85°F, check at 2 hours. Temperature changes time more than any other variable.
Above 80°F, soft vegetables turn mushy and off-flavors develop before proper acidification. Keep kimchi and sauerkraut at 65–72°F for best texture.
Fermentation time varies with temperature, salt concentration, culture activity, and batch size. This calculator estimates bulk fermentation, proofing, and lacto-fermentation timelines for common foods so you can plan your schedule.