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Baking Pan Size Converter

A baking pan size converter compares batter volume between round, square, rectangular, loaf, and bundt pans. Scale a recipe by the volume ratio. Bundt volume subtracts an estimated centre tube.

Quick Summary & Direct Answer
Kitchen

Can 9-inch round batter fill a 9×13 pan?

A 9×2 in round holds about 127 in³ (8.8 cups). A 9×13×2 in pan holds about 234 in³ (16.2 cups). The volume factor is 1.84, so one 9-inch layer is not enough; two layers plus extra, or a scaled recipe, fill the sheet.

Key Takeaways

  • Volume, not diameter, is what scales a batter.
  • A bundt tube is modelled as 35% of the outer diameter.
  • Linear factor is the cube root of volume factor for 3D mix-ins, not for baking time.
  • Food Network charts list typical cups; this page computes from geometry.

Recipe pan

Bake in

Scale batter by

× 1.84

From volume127 in³ (8.8 cups)
To volume234 in³ (16.2 cups)
Linear (cube root)1.23

Results can be wrong. This calculator is unofficial. Figures can be incomplete, rounded, or not updated. Use them at your own risk and check a tape, datasheet, ball band, or official chart before cutting, mixing, buying, or publishing. Limits of liability are in the terms of service.

Frequently asked questions

It divides destination volume by source volume. Multiply ingredient weights by that factor.

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Publisher notes · reviewed 29 October 2026

Batter scales with volume, not diameter

Round volume is π r² h. A 9×13×2 pan holds more than one 9×2 round. The scale factor is destination / source. Baking time does not use that factor.

Bundt tube

The tube is modelled as 35% of the outer diameter. A real pan’s tube can differ; fill with water to check cups.

Worked examples

  • 9 in round to 9×13

    Volume factor about 1.84 at 2 in depth.

Limits of this page

  • Cups use 14.4375 in³ per US cup.
  • Springform bottoms are treated as the typed diameter.

Sources