Fermentation timing

Pain au Levain — Timing by Kitchen Temperature

Baseline: 4.5h bulk + 12h proof at 76°F. Adjust for your kitchen below.

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The full Pain au Levain schedule (76°F baseline)

Pain au Levain is a hearth-style sourdough from France. From a ripe levain to a cooled loaf it runs about 18.6 h of dough-day time on top of a ~5-hour levain build. Every duration below is the 76°F baseline — scale it with the temperature table lower down for your own kitchen.

Stage-by-stage Pain au Levain schedule at 76°F
StageDurationElapsed from mix
Levain build to peak (before mixing)~5 h−5 h
Autolyse (flour + water rest)builds extensibility before the levain goes in30 min30 min
Mix — add levain & salt18 min48 min
Bulk fermentation with stretch-and-folds3–4 sets of folds in the first ~2 hours, then leave it to rise4.5 h5.3 h
Pre-shape & bench rest24 min5.7 h
Final shape12 min5.8 h
Cold retard (refrigerator)develops flavour + firms the dough for scoring12 h17.8 h
Bake — 480°F in a dutch ovenabout 45 minutes48 min18.6 h

A sample overnight clock plan

One realistic way to fit Pain au Levain around a normal day, at ~76°F. Shift the whole thing earlier or later to suit — only the gaps between stages matter.

  • 12:00 PM — feed the levain (peaks in ~5 h).
  • 5:00 PM — Autolyse.
  • 5:30 PM — Mix.
  • 5:45 PM — Bulk fermentation with stretch-and-folds.
  • 10:15 PM — Pre-shape & bench rest.
  • 10:39 PM — Final shape.
  • 10:48 PM — Cold retard.
  • 10:48 AM — Bake.
  • 11:33 AM — loaf out of the oven; cool at least 1 hour before slicing.

Reading each stage by feel

The clock is a guide; the dough is the real timer. Levain is ready at its peak — domed and just starting to recede, floating in water. Bulk is done at a 50–75% rise with a bubbly, jiggly, domed mass — under-shooting gives a tight crumb, over-shooting a slack, gummy one. Proof is judged by the poke test: a slow, partial spring-back. Because Pain au Levain cold-retards, you can bake straight from the fridge — cold dough scores more cleanly.

Temperature × time table

Kitchen tempMultiplierBulk (h)Proof (h)
62°F2.20×9.926.4
68°F1.58×7.118.9
72°F1.23×5.514.7
76°F1.00×4.512.0
80°F0.78×3.59.4
85°F0.56×2.56.7

Calculator pre-set to Pain au Levain

Multiplier at 76°F
1×
Adjusted bulk ferment
4.5 h
Adjusted final proof
12 h
How the math works

Multipliers are piecewise-linear interpolations between reference points measured by Myhrvold et al. in Modernist Bread vol 3. 76°F is the baseline (1.0×); every 10°F drop roughly doubles fermentation time, and every 10°F rise roughly halves it.

Pain au Levain timing — FAQ

How long does Pain au Levain take start to finish?

Plan on a ~5-hour levain build first, then about 18.6 h of dough-day work at a 76°F baseline — most of which is a hands-off 12 h cold retard in the refrigerator, so active time is only ~6.6 h. Warmer kitchens run faster and cooler ones slower; use the temperature table below to re-time every stage.

How long is the Pain au Levain bulk ferment?

4.5 h at 76°F. It's done when the dough has risen 50–75%, domed, and jiggles when you shake the container — not strictly at the 4.5 h mark. Multiply by your kitchen's temperature factor (table below) to re-time it.

Can I bake Pain au Levain the same day instead of cold-retarding?

Yes — replace the 12 h refrigerator retard with a 1.5 h–2.5 h room-temperature proof and bake once a floured poke springs back slowly and only partway. You trade some flavour depth and scoring ease for speed.

When is Pain au Levain fully proofed and ready to bake?

Use the poke test: flour a finger, press ~1 cm into the shaped loaf. Ready dough springs back slowly and only partway, leaving a slight dent. Instant spring-back = under-proofed (give it more time); no spring-back and a dense feel = over-proofed (bake immediately, next time shorten the proof).

Sources: Myhrvold et al., Modernist Bread vol 3 (temperature multipliers); Hamelman — Bread 3rd ed., Pain au Levain formula.

The gear that makes the math work

A short, honest baking kit. The scale matters most — every weight on this page is in grams. The Dutch oven is what turns a good crumb into a great crust.

Affiliate links. As an Amazon Associate, SourdoughHydration earns from qualifying purchases at no extra cost to you.

  • Digital kitchen scale (0.1 g)Digital kitchen scale (0.1 g)

    Baker's percentage is by weight, not volume — a 0.1 g scale is what makes the math on this page accurate.

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  • Banneton proofing basketBanneton proofing basket

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  • Bread lameBread lame

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  • Bench scraperBench scraper

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  • High-protein bread flourHigh-protein bread flour

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  • Danish dough whiskDanish dough whisk

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Or learn the craft by ear

The numbers here are the what; a good baking book is the why. An Audible trial gets you any title free — Michael Pollan’s Cooked(the “Air” chapter is the best story ever told about why bread rises) is a perfect first listen.

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