23 × 33 cm / 9 × 13 in tin
755 cm² · 3.8 litres
23 × 33 cm · 117.0 in² · 50 mm deep · rectangular
About this tin
The American 9 × 13, and the most-specified tin in the English-speaking world — sheet cakes, lasagne, roasted vegetables. Note the metric figures: 9 × 13 inches is 23 × 33 cm, not the 20 × 30 cm tin sold across Europe, which is nearly a quarter smaller.
The numbers
| Dimensions | 23 × 33 cm · 9.0 × 13.0 in |
| Depth | 50 mm · 2.0 in |
| Base area | 755 cm² · 117.0 in² |
| Volume to the rim | 3.8 litres |
| Usable batter | about 2.3 litres — filled to roughly two thirds |
What can replace a 23 × 33 cm / 9 × 13 in
A recipe is written for an area, because area sets the depth and depth sets the baking time. Anything within about 10% needs no adjustment. Past that, change the time first and only then the temperature.
| Tin | Area | vs this one | Effect |
|---|---|---|---|
| 30 cm / 12 in round | 707 cm² | -6% | Interchangeable — no change needed |
| 28 cm / 11 in round | 616 cm² | -18% | Batter 1.23× as deep — allow 9–18 minutes longer |
| 20 × 30 cm traybake | 600 cm² | -21% | Batter 1.26× as deep — allow 10–21 minutes longer |
| Swiss roll 25 × 38 cm | 950 cm² | +26% | Batter 0.79× as deep — check 13–26 minutes early |
Frequently asked questions
What is the area of a 23 × 33 cm / 9 × 13 in tin?
755 cm² (117.0 in²), holding roughly 3.8 litres filled to 50 mm.
Can I use a different tin instead of a 23 × 33 cm / 9 × 13 in?
The closest here is 30 cm / 12 in round at 707 cm² — 6% less area, so it sits deeper and needs longer. As a rule, anything within about 10% needs no change; beyond that, adjust the time before the temperature.
How much does a 23 × 33 cm / 9 × 13 in tin hold?
About 3.8 litres to a depth of 50 mm. Cake batter is normally filled to between half and two thirds, so 2.3 litres of mixture is a working figure.
Why does tin size change the baking time?
Because a recipe is written for a depth, not a name. Heat reaches the centre of a shallow cake sooner, so the same mixture in a wider tin is done earlier and browns more at the edges. The area ratio tells you how much shallower: swapping a 23 × 33 cm / 9 × 13 in for a 30 cm / 12 in round changes the depth by a factor of 1.07.
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