Sourdough Baking Temperature & Time Calculator

Get a practical stage-by-stage baking plan based on your loaf details and oven setup. Use this tool to improve oven spring, crust color, and crumb set without guesswork.

How to Use This Calculator

Set loaf size and shape.
Choose flour type, hydration, and oven mode.
Use the generated bake plan as your starting schedule.

Frequently Asked Questions

What temperature should I bake sourdough at?

Start at 500°F (260°C) for the first phase if you are using a Dutch oven, then drop to 450°F (230°C) once the lid is on. For open baking on a stone or steel, preheat to 500°F and reduce to 425°F (220°C) when the dough goes in. The initial high heat drives oven spring; the lower temperature cooks the loaf through without burning the crust. Most home ovens run 10–25°F off from their display — confirm with a separate oven thermometer.

How long should sourdough bake?

A standard 900g loaf bakes for 20 minutes covered (or with steam) and another 20 minutes uncovered, totaling about 40 minutes. Smaller loaves scale down sub-linearly because surface-to-volume changes — a 500g loaf takes roughly 30 minutes total, not 22. This calculator handles the math: enter your shaped loaf weight and vessel type for a precise time.

Why does my sourdough need both covered and uncovered baking?

The covered phase traps steam released from the dough itself, keeping the crust soft and extensible so the loaf can fully expand. This is when oven spring happens. Removing the lid in the second phase dries the crust, caramelizes it, and develops color and crackle. Skipping the covered phase produces a pale, dense loaf with restricted spring; skipping the uncovered phase produces a pale, leathery crust.

What internal temperature means sourdough is fully baked?

208°F (98°C) at the center of the loaf is the standard target for most lean sourdough loaves; anywhere from 200–210°F (93–99°C) is acceptable. Below 200°F the interior may still be gummy or sticky after cooling. Above 210°F you risk drying out the crumb. Insert an instant-read thermometer through the bottom (cleaner-looking on a finished loaf) when the crust looks done. Internal temp is the most reliable doneness check — the toothpick test does not work for bread.

Should I bake sourdough in a Dutch oven or on a baking stone?

A Dutch oven is more forgiving and produces consistent results because it traps the dough's own steam in a sealed environment. A baking stone or steel can produce equally good loaves but requires actively generating steam (lava rocks, a pan of boiling water, ice cubes) and managing it precisely for the first 15 minutes. Beginners should start with a Dutch oven; advanced bakers often prefer stone setups for higher batch capacity or larger loaves. If you choose open bake mode in this calculator, the recommendations adjust to account for the additional steam management.

Do I need to preheat the Dutch oven before baking sourdough?

Yes — preheat the Dutch oven empty inside the oven at 500°F for at least 45 minutes before baking. The mass of cast iron needs that time to reach uniform temperature, which is what delivers the burst of bottom heat that drives oven spring. Loading dough into a cold or under-preheated vessel is one of the most common reasons for flat loaves and poor oven spring.

How should I adjust for a convection (fan) oven?

Convection ovens move hot air more efficiently, so bread usually needs a slightly lower temperature (about 25°F lower than what the recipe calls for) and a bit less time. When you select a convection or fan-assisted oven in this calculator, it lowers the suggested temperatures and trims the bake times automatically. Still start checking the crust a few minutes earlier than the timer suggests — convection browning is faster and less forgiving.

Why does the calculator ask about hydration percentage?

Hydration (water as a percentage of flour) affects how quickly your loaf browns and how long it takes the crumb to set. Higher-hydration doughs usually need a little more time uncovered to fully color and dry out the interior; lower-hydration doughs brown faster and may require slightly shorter bake times to avoid an overly thick crust.

How does flour type change the recommended bake?

Whole grain, rye, and enriched doughs brown faster than a simple white or bread-flour loaf because of higher sugar and protein content in the bran and germ. The calculator nudges temperatures and times to account for that, aiming to prevent burnt crusts on the outside while the center finishes baking. You can still fine-tune based on how dark you personally like your loaves.

Why is my sourdough crust too pale or too dark?

Pale crust usually means the uncovered phase was too short, the oven was below 425°F, or the dough was under-proofed and the surface sugars did not develop. Dark or burnt crust means the oven was above 475°F uncovered, or the loaf baked too long after the lid came off. For more browning, extend the uncovered time by 5 minutes or raise temperature 25°F. For less browning, do the opposite or lower the rack one position.

My oven runs hot or cold. Can this calculator still help?

Yes, but you'll get the best results if you know your real oven temperature. If you're just relying on the dial, treat the suggested temperatures and times as starting points and use crust color plus internal temperature to decide when to pull the loaf. Once you've baked a few times, you can mentally add or subtract a few minutes from the ranges the tool gives you, or invest in a $10 oven thermometer that lives inside the oven permanently.

How long should I wait before slicing sourdough after baking?

Wait at least 1 hour, ideally 2, before slicing a freshly baked loaf. The interior is still cooking from residual heat for 20–30 minutes after the loaf leaves the oven, and the crumb needs time to set as steam redistributes. Cutting too early produces gummy slices and accelerates staling because moisture escapes from the cut surface.

How do I get the crispiest possible crust?

For a bold, very crisp crust, bake toward the upper end of the suggested time ranges and target the higher end of the internal temperature range (around 210°F). Use a covered bake vessel for the first phase to maximize oven spring, then leave the loaf in for the full uncovered phase or 3–5 minutes longer. Let it cool fully on a wire rack — never on a flat surface — so trapped steam can escape and the crust stays crackly instead of softening.

How accurate are the times and temperatures in this calculator?

The ranges are based on widely used sourdough baking practices and home-oven testing, but every oven is different. Think of the results as well-tested guidelines, not guarantees; your real finish line is crust color plus internal temperature, not the timer alone. After a few bakes you'll know whether your oven needs a small offset, and you can incorporate that mentally going forward.

Why Baking Temperature Matters for Sourdough

Sourdough baking happens in two stages: covered (steam phase) and uncovered (crust phase). The covered phase traps steam from the dough itself, keeping the surface soft and extensible so the loaf can expand fully before the crust sets. Remove the lid too early and you get a thick, pale crust that restricts oven spring. Remove it too late and the crust never fully caramelizes.

Temperature determines the intensity of both phases. A 450°F oven with a well-preheated Dutch oven delivers intense bottom heat that drives rapid oven spring. A cooler oven or a Dutch oven that wasn’t preheated long enough produces a flatter, denser loaf with less crust development.

Common Baking Temperature Adjustments

If your crust is burning before the interior is fully baked: reduce the temperature by 25°F or shorten the uncovered phase. If your crust is pale and soft even after 25 minutes uncovered: your oven is running cool — verify with an oven thermometer and start 25°F higher. If the bottom is burning: place a second baking sheet below your Dutch oven or lower the rack position.

High hydration loaves (78%+) often benefit from a slightly longer uncovered phase because they carry more moisture. Whole wheat loaves can handle slightly lower temperatures as the bran is more susceptible to burning. This calculator generates a stage-by-stage schedule based on your specific dough and oven setup.

Internal Temperature: The Most Reliable Test

The most reliable way to know your loaf is done is internal temperature. A fully baked sourdough reaches 205–210°F (96–99°C) at the center. At this point, the starches have fully gelatinized and the crumb structure is set. Pull the loaf before this and you’ll get a gummy, underbaked center no matter how good the crust looks.

An instant-read thermometer inserted through the bottom of the loaf gives you the most accurate reading. If the loaf needs more time, return it to the oven without the Dutch oven — the open oven will crisp the crust while the interior finishes baking.