liminfoBaking Pan Size Converter
Free web tool: Baking Pan Size Converter
Volume
234.0 cu in
Conversion to Standard Pans
About Baking Pan Size Converter
The Baking Pan Size Converter calculates the volume of any rectangular or round baking pan in cubic inches, U.S. gallons, liters, and dry quarts (the unit used on bags of potting soil and baking mixes). For rectangular pans, volume is width × length × depth. For round pans, it uses π × (diameter/2)² × depth. Results update in real time as you type.
The converter is aimed at home bakers, pastry chefs, and recipe developers who need to scale recipes between differently sized pans. The tool compares your custom pan against six standard reference pans — 8×8×2, 9×9×2, 9×13×2, 8-inch round, 9-inch round, and 10-inch round — and shows a multiplication factor for each. A factor of 0.78× means your pan holds 78% of that standard pan's batter, telling you to reduce the recipe by about 22%.
All calculations run entirely in the browser. No baking data, measurements, or preferences are sent to a server. The interface supports both metric and imperial thinking: the primary input is in inches (matching most US baking molds), while output includes liters for international users. Dark mode and mobile layout are fully supported.
Key Features
- Rectangular pan volume: width × length × depth in cubic inches
- Round pan volume: π × radius² × depth calculated automatically
- Conversion to U.S. gallons, liters, and dry quarts in a single view
- Side-by-side ratio to 6 standard pans (8x8, 9x9, 9x13, 8/9/10-inch round)
- Tab switch between rectangular and round pan modes without page reload
- 100% client-side — no data leaves your browser
- Real-time calculation as you type each dimension
- Dark mode and responsive design for kitchen tablet use
Frequently Asked Questions
How do I substitute one pan size for another in a recipe?
Find the ratio shown next to your target pan. A ratio of 1.00× means exact fit. Below 1× means your pan is smaller (reduce batter or adjust bake time). Above 1× means your pan is larger (the batter will be shallower and may bake faster). As a rule of thumb, a 25% reduction in depth cuts bake time by about 5–10 minutes at the same temperature.
What is a dry quart and why is it used?
A dry quart (67.2 cubic inches) is the standard unit for measuring potting soil and some baking mixes in the United States. It differs from a liquid quart (57.75 cubic inches). The dry quart figure lets you directly compare pot or pan volume to the bag sizes sold in garden centers and grocery stores.
Why does the round pan use π × r² × depth?
The area of a circle is π times the radius squared. Multiplying by depth gives the cylinder volume. The radius is half the diameter you enter. For example, a 9-inch diameter pan has a radius of 4.5 inches, so its area is π × 4.5² ≈ 63.6 square inches, and at 2-inch depth the volume is about 127.2 cubic inches.
Can I use centimeters instead of inches?
The calculator currently uses inches, matching the most common US bakeware labeling. To convert: divide centimeters by 2.54 to get inches. For example, a 23 cm pan is about 9.1 inches. Enter the converted value and the results will be accurate.
What does the 9x13x2 standard pan volume represent?
A standard 9×13×2-inch rectangular pan has a volume of 9 × 13 × 2 = 234 cubic inches, which is roughly 1 gallon. It is one of the most common baking pans in American households and serves as a universal reference for scaling casseroles, sheet cakes, and brownies.
How accurate is the volume for non-straight-sided pans?
The calculator assumes straight sides (a perfect rectangle or cylinder). Many pans taper slightly, meaning the actual usable volume can be 5–10% less. For very tapered or decorative molds, measure water fill capacity directly for best accuracy.
How do I know how much batter to pour into a pan?
Most baking recipes fill a pan about two-thirds full to allow for rising. Multiply the pan volume by 0.67 to get the recommended batter volume. If your ratio to a 9×13 pan is 0.78×, you need 78% of the batter a full 9×13 recipe produces.
Is this tool useful for non-baking purposes like planters or containers?
Yes. The volume calculation applies to any rectangular or cylindrical container. Gardeners use it to determine how much potting mix a planter needs, and the dry quart output directly matches common soil bag sizing.