The 8x4" loaf pan has a base of 32 sq in (206 cm²).
The 8x4" loaf pan in centimeters, and pans of about the same size
Measured across the top, the 8x4" loaf pan is 20.3 × 10.2 cm, with a base of 206 cm².
No other common pan, or pair of pans, is within 10 % of its area, so scale the recipe with the factors in the table above.
Measure a pan across the top, from inside edge to inside edge, not across the bottom or the outside: that is the size recipes and labels give. Pans with sloped sides are smaller at the bottom than the size on the label.
Factors keep the batter as deep as in the 8x4" loaf pan. Below 1 means make less; above 1, more.
Frequently asked questions
How big is the 8x4" loaf pan?
Its base is 32 sq in (206 cm²).
How do I convert a recipe from the 8x4" loaf pan to the 9x13" pan?
Multiply the recipe by 3.66 (about 3 2/3 ×) so the batter stays as deep. The 9x13" pan is 117 sq in.
Does the baking time change?
If the batter is deeper or shallower than the recipe’s, yes: shallower bakes faster, deeper slower. Start checking early and use the recipe’s doneness test.