Bread Loaf Pan Calculator
Find the optimal dough weight for any loaf pan. Select a standard preset or enter custom dimensions — get dough weight, flour amount, hydration, and fill percentage for sandwich, sourdough, brioche, quick bread, and Pullman loaves.
Display Units
Loaf Pan
Standard white or whole wheat sandwich loaf. Soft, even crumb.
Optimal Dough Weight
627grams
Pan volume: 1567 ml • Density: 0.4 g/ml • Fill: ~36%
Rise Headspace Guide
| Bread Type | Initial fill | 1st rise target | 2nd rise (in pan) | Oven spring |
|---|---|---|---|---|
| Sandwich Bread | 50-60% | Double | 1" above rim | +20-40% |
| Sourdough | 50-60% | Double | 1" above rim | +20-40% |
| Quick Bread (banana, zucchini) | 50-60% | N/A (no yeast) | 1" above rim | +20-40% |
| Brioche | 50-60% | Double | 1" above rim | +20-40% |
| Pullman Loaf (lidded pan) | 80-90% | Double | To lid | None (lid) |
Common pan sizes reference
| Pan | Volume | Sandwich dough | Sourdough dough |
|---|---|---|---|
| 8.5×4.5×2.5" (standard sandwich) | 1567 ml | 627g | 548g |
| 9×5×3" (large sandwich) | 2212 ml | 885g | 774g |
| 13×4×4" Pullman (square crust) | 3409 ml | 1363g | 1193g |
| 5.75×3×2" mini loaf | 565 ml | 226g | 198g |
The "Mushroom" vs "Shroom-free" Bake
If you want a domed top on your sandwich loaf, underfill by 10% and allow dough to rise 1 inch above the pan rim. For a perfectly flat top (ideal for sandwiches), use a Pullman lid or simply weigh your dough exactly — a tight fill prevents the dome.
Why Dough Weight Matters: The Science of Pan Fill Level
One of the most common bread baking mistakes is adding the wrong amount of dough to a pan. Too little produces a flat loaf that barely crests the pan rim. Too much overflows during the final proof or baking, creating a mushroom-shaped loaf that falls off the sides. Getting the amount right produces a beautifully domed, evenly baked loaf every time.
The key insight: the optimal amount of dough for any pan is not the same for all bread types. A sourdough loaf and a brioche loaf baked in the same pan require different dough weights because they have different densities and rise behaviors.
The Density Factor
Different bread types have different densities at their optimal fill point:
| Bread Type | Density (g/ml) | Why? |
|---|---|---|
| Sourdough | 0.35 g/ml | High hydration, large open crumb — dough is very airy after proofing |
| Sandwich bread | 0.40 g/ml | Standard hydration, moderate crumb structure |
| Quick bread | 0.45 g/ml | Batter rather than dough — denser, less rise from no gluten network |
| Brioche | 0.50 g/ml | Rich dough with eggs and butter — heavier, rises less proportionally |
| Pullman (lidded) | 0.55 g/ml | Lid prevents expansion — must fill more fully to produce square loaf |
Pan Volume Calculation: The Simple Formula
For rectangular loaf pans, volume is simply length × width × height:
Loaf Pan Volume
Volume (ml) = L (in) × W (in) × H (in) × 16.387 The constant 16.387 converts cubic inches to milliliters. For metric measurements: Volume (ml) = L (cm) × W (cm) × H (cm) ÷ 1000 (to convert cm³ to ml, though 1 cm³ = 1 ml exactly).
Standard Pan Volumes
| Pan dimensions | Volume (cubic in) | Volume (ml) | Volume (cups) |
|---|---|---|---|
| 8.5×4.5×2.5" | 95.6 cu in | 720 ml | 3.0 cups |
| 9×5×3" | 135 cu in | 1130 ml | 4.8 cups |
| 13×4×4" Pullman | 208 cu in | 1900 ml | 8.0 cups |
| 5.75×3×2" mini | 34.5 cu in | 250 ml | 1.06 cups |
Understanding Oven Spring: The Final Rise
Oven spring is the rapid expansion of bread dough during the first 10–15 minutes of baking. When cold or room-temperature dough enters a hot oven, three things happen simultaneously:
- Yeast activity surges: As temperature rises from 70°F toward 140°F (21°C to 60°C), yeast metabolizes rapidly and produces large amounts of CO2.
- Gas expansion: Existing CO2 bubbles in the dough expand as temperature increases (gases expand when heated).
- Steam production: Water in the dough converts to steam, adding further pressure to the gas cells.
This combination causes bread to expand dramatically — often 20–40% in volume — before the exterior crust sets and restricts further expansion. This is why bread dough placed at 50% fill level reaches 1 inch above the pan rim after proofing and then expands to a beautiful dome in the oven.
For Pullman loaves, the lid is placed after the final proof (when dough just reaches the top of the pan). The lid prevents oven spring expansion and forces a perfect square cross-section.
Quick Bread vs. Yeast Bread: Different Fill Strategies
Quick breads (banana bread, zucchini bread, pumpkin bread) use chemical leavening (baking powder and/or baking soda) rather than yeast fermentation. This changes the fill strategy:
- Fill quick bread pans no more than ⅔ full (about 67% of volume)
- Quick bread batter rises quickly in the oven and then stops — there is no pre-oven proofing period
- The banana bread crack along the top is deliberate and desirable — it forms because the surface sets before the interior fully rises
- At exactly ⅔ fill, most standard quick bread recipes produce a loaf that rises to just above the pan rim with the characteristic central crack
Scaling Recipes: From One Pan Size to Another
When you want to use a different pan than a recipe specifies, scale all ingredients by the ratio of the target pan's volume to the source pan's volume:
Recipe Scaling for Different Pans
Scale factor = Target pan volume ÷ Recipe pan volume Example: Scaling a 9×5×3" recipe (1130ml) to fit an 8.5×4.5×2.5" pan (720ml): Scale factor = 720 ÷ 1130 = 0.637. Multiply all ingredients by 0.637. A recipe calling for 400g flour becomes 255g; 280g water becomes 178g; 7g yeast becomes 4.5g.
Bake time adjusts proportionally to the square root of the volume ratio: New time ≈ Original time × √(720/1130) = Original time × 0.80. A 35-minute loaf becomes approximately 28 minutes. Start checking at 25 minutes.
The Overfill Problem: Why More Dough Isn't Better
Overfilling a loaf pan creates several distinct problems:
- Overflow during proofing: The dough rises over the pan sides, losing its structural support. The resulting loaf is misshapen and doesn't dome properly.
- Overflow during baking: Dough that flows over the pan sides burns on the oven floor or rack, creating smoke and a bitter taste on the loaf exterior.
- Dense interior: When the dough overflows, it loses gas. The interior may be dense and gummy because gas escaped rather than being retained in the crumb structure.
- Uneven baking: A loaf that's too tall relative to its pan width doesn't bake evenly — the center remains raw while the exterior reaches doneness.
If you have more dough than your pan needs, simply form a second smaller loaf or bake the excess as rolls. Never compress extra dough into a pan — this degasses the dough and produces an unacceptably dense loaf.
Frequently Asked Questions
A 9×5×3 inch loaf pan (≈1130ml volume) needs approximately 450g of sandwich bread dough, 395g of sourdough, or 565g of brioche. These weights produce a loaf that fills 50–60% of the pan before the final proof, then rises to 1 inch above the rim — the perfect position for a well-domed, evenly baked loaf.
For most yeast breads: 50–60% of pan volume before the final proof. After proofing, the dough should reach 1 inch above the pan rim. For Pullman (lidded) pans: fill to 80–90% before placing the lid. For quick breads: fill to ⅔ (67%) maximum — they have less rise than yeast breads.
Caving in the center is almost always over-proofing. Over-proofed dough has stretched its gluten to the limit and can no longer hold gas during the oven's heat. The structure collapses before the bread can set. Solution: shorten the final proof time, use less yeast, proof at a lower temperature, or use the finger-poke test (dough should slowly spring back halfway when poked).
Related Baking Tools
- Robertson, C. (2010). Tartine Bread. Chronicle Books.
- Leader, D. (2007). Local Breads. Norton.
- King Arthur Baking. "Understanding yeast bread rise." kingarthurbaking.com.
- Hamelman, J. (2004). Bread: A Baker's Book of Techniques and Recipes. Wiley.
- Suas, M. (2009). Advanced Bread and Pastry. Cengage Learning. Fermentation chapters.