9×9 to 9×13 Rectangle Pan Converter
Need to convert a 9×9 pan recipe to fit a 9×13 pan?
This simple calculator increases the recipe amount using the correct
volume difference so your bars, brownies, and cakes bake evenly.
Quick fact: A 9×13 pan holds about 44% more batter than a 9×9 pan.
9×9 to 9×13 Rectangle Pan Converter
Need the Opposite Conversion?
9×13 to 9×9 Rectangle Pan Converter
9×9 to 9×13 Rectangle Pan Conversion Chart
• Multiply any 9×9 recipe amount by 1.444 (about 44% more)
• Example: 2 cups batter → 2.888 cups (about 44% more)
• Example: 300 g batter → 433.2 g (about 44% more)
• Example: 1 cup frosting → 1.444 cups (about 44% more)
Formula
new amount = original amount × 1.444
Beginner-Friendly Explanation
A 9×13 pan is larger than a 9×9 pan.
It holds about 44% more batter, so you need to increase the recipe amount.
Just type in the amount your recipe uses, and this tool tells you the new amount.
Use this converter anytime you need to scale a 9×9 recipe to a 9×13 pan.