Pan Size Calculator

Don't have the pan size your recipe calls for? Calculate the perfect ingredient adjustments for any pan.

Pan Size Calculator
Calculate recipe adjustments when using different pan sizes

Recipe Pan (Original)

Volume: 127.2 cubic inches

Your Pan

Volume: 127.2 cubic inches
Recipe Scaling Factor
0.79x
Reduce all ingredients by 21%
Based on volume ratio: 100.5 ÷ 127.2 cu. in.

Baking Tips

  • • Adjust baking time: smaller pans need less time, larger pans need more
  • • Check doneness 5-10 minutes earlier than the original recipe
  • • Fill pans only 2/3 full to allow room for rising

How Pan Size Affects Baking

Using the wrong pan size can dramatically affect your baking results. A pan that's too large will result in thin, dry baked goods, while a pan that's too small can cause overflow or underbaked centers.

Quick Reference Guide

Common Substitutions

  • • 9" round ≈ 8" square
  • • Two 9" rounds ≈ One 9×13" rectangle
  • • 8" round ≈ 9" round (adjust by 0.8x)

Volume Formulas

  • • Round: π × r² × depth
  • • Square: side² × depth
  • • Rectangle: L × W × depth