# Cake Pan Size Converter

URL: https://speedycalculator.com/calculators/food/cake-pan/
Last updated: 2026-10-25

> The cake pan converter tells you how much to scale a recipe when switching between pan sizes and shapes, by comparing their areas.

## Inputs

- Original pan shape
- Original diameter or length (in)
- Original width (rectangular) (in)
- New pan shape
- New diameter or length (in)
- New width (rectangular) (in)

## Results

- Original area
- New area
- Multiply ingredients by

## Formula

```
Scale factor = new pan area ÷ original pan area
```

## Explanation

Batter depth stays similar when you scale by area, so baking times change only slightly.

### How to use the Cake Pan Size Converter

- **Original pan shape**
- **Original diameter or length**
- **Original width (rectangular)**
- **New pan shape**
- **New diameter or length**
- **New width (rectangular)**

Results update as you type, and every field accepts the units shown in its menu.

### How it works

Areas of round and rectangular pans are calculated and divided to give the multiplier for each ingredient.

### Inputs explained

FieldWhat to enterOriginal pan shapeChoose one: Round, Square / rectangularOriginal diameter or lengthIn inOriginal width (rectangular)In inNew pan shapeChoose one: Round, Square / rectangularNew diameter or lengthIn inNew width (rectangular)In in

### Example values

How the main result changes when **Original diameter or length** changes and everything else stays at the example values above:

Original diameter or length (in)Multiply ingredients by (×)49.3164.1482.33101.49121.03160.58

## Worked example

Inputs — Original pan shape: Round; Original diameter or length: 8 in; Original width (rectangular): 8 in; New pan shape: Square / rectangular; New diameter or length: 9 in; New width (rectangular): 13 in.

Results — Original area = 50.3 in²; New area = 117 in²; **Multiply ingredients by = 2.33 ×**.

## FAQ

**Will baking time change?**
Shallower batter bakes faster; deeper batter needs longer at a slightly lower temperature.

**What about Bundt pans?**
Compare volumes by filling each with water.

**What formula does the Cake Pan Size Converter use?**
Scale factor = new pan area ÷ original pan area.