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Bulk Fermentation Timer

Estimate your bulk fermentation time based on your kitchen temperature, starter strength, and flour type. Start the timer and get stretch & fold reminders.

Bulk ferment timer β€” Tool tool

1. Room Temperature

72Β°F
65Β°F85Β°F

2. Starter Strength

3. Flour Type

Estimated Bulk Fermentation

4h – 5h 30m

estimated total time

What to Look For

↑↑

50–75% volume increase

γ€°

Jiggly, airy texture when shaken

β—‘

Domed top surface with bubbles

Timer

00:00:00

πŸ„ Stretch & Fold Schedule

Perform a set of stretch & folds every 30 minutes for the first 2 hours, then leave the dough undisturbed.

1

Fold #1 at 30 min

Wet hands. Stretch each side up and over.

30:00
2

Fold #2 at 60 min

Dough should feel slightly stronger now.

60:00
3

Fold #3 at 90 min

Building tension. Gentle stretches.

90:00
4

Fold #4 at 120 min

Last fold. Let the dough rest after this.

120:00

πŸ’‘ Temperature Tip

At 72Β°F, expect a longer bulk of 4h–5h 30m. Be patientβ€”the flavor will be worth it.

Frequently Asked Questions

How do I know when bulk fermentation is done?
Look for a 50-75 percent increase in volume, a domed top surface with visible bubbles, and a jiggly, airy texture when you gently shake the container. Trust visual cues over the clock.
Does room temperature really affect fermentation time?
Yes, significantly. A kitchen at 80 degrees Fahrenheit can cut fermentation time in half compared to 68 degrees. Even a few degrees make a noticeable difference in timing.
How many stretch and folds should I do during bulk fermentation?
Most recipes call for 4 sets of stretch and folds, one every 30 minutes during the first 2 hours. After that, leave the dough undisturbed for the remainder of the bulk.
Can I do bulk fermentation in the fridge overnight?
You can, but most bakers prefer to cold-retard during the final proof, not during bulk. If you do cold bulk, expect 8-12 hours in the fridge and bring the dough to room temperature before shaping.
What happens if I over-ferment my sourdough?
Over-fermented dough becomes slack, sticky, and difficult to shape. The bread may turn out flat with a gummy interior and overly sour flavor. If in doubt, end bulk early rather than late.

Related Guides

πŸ›’ Take the guesswork out of bulk

Temperature drives your bulk time β€” hold it steady and shape into a proper basket.

🌑️ Brod & Taylor Folding Proofer
Holds a set temperature so your bulk time is predictable, not a guess.🧺 9" Round Banneton
Shape into this once bulk is done for an even final proof.

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