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Oven temperature and pan size converter

Convert oven temperatures between °C, °F, fan oven and gas mark, and work out how much to scale a recipe for a different round, square or rectangular pan.

更新日 検証済みの例：9

試す
Conventional oven
°C
Conventional oven: 176.7 °C
小数点以下の最大桁数：1；最も近い値へ、等距離ならゼロから遠い値へ
Conventional oven
350°F
Fan oven
156.7°C
Gas mark
4
Fan ovens vary; Which? puts the usual reduction at about 20 °C, and your oven's manual gives the figure for that model.

350 °F is 177 °C in a conventional oven, 157 °C in a fan oven, and gas mark 4.

Oven heat (°C, conventional)

Very coolCoolModerateHotVery hot90130160185210235290Fan setting177 °C
計算方法 S

  1. 華氏度 → 摂氏度

    (350−32)×59=176.67 ∘C(350 - 32) \times \tfrac{5}{9} = 176.67\,^\circ\text{C}

  2. Fan oven

    176.67−20=156.67 ∘C176.67 - 20 = 156.67\,^\circ\text{C}

  3. Nearest gas mark

    350 °F is closest to gas mark 4 (350 °F).

Oven temperature and pan size converterについて

Oven temperatures convert with °F = °C × 9/5 + 32. A fan oven is set about 20 °C below a conventional one, and gas mark 1 is 275 °F (140 °C), with each mark adding 25 °F. For pans, the ingredient factor is the area of your pan divided by the area of the recipe's pan, which keeps the batter at the same depth.

The default converts 350 °F: 176.7 °C, which recipes round to 180 °C, or 156.7 °C in a fan oven (usually written 160 °C), and gas mark 4. In pan mode, a 9-inch round pan (63.6 sq in) and an 8-inch square pan (64 sq in) hold almost the same amount, a factor of 1.006.

Oven thermostats and fans vary, so treat the converted setting as a starting point. When batter ends up deeper or shallower than the recipe intended, check for doneness early.

計算例

350 °F → °C

単位換算
Oven temperature
Oven setting
350
Setting is in
°F
Convert to
°C
Conventional oven
176.7 °C
Fan oven
156.7 °C
Gas mark
4

照合元：Python decimal: (350 − 32) × 5/9; gas mark 4 = 350 °F (gas mark table)

180 °C → °F

単位換算
Oven temperature
Oven setting
180
Setting is in
°C
Convert to
°F
Conventional oven
356 °F
Gas mark
4

照合元：180 × 9/5 + 32 = 356; nearest mark is 4 (350 °F)

Gas mark 1/4

単位換算
Oven temperature
Oven setting
1/4
Setting is in
Gas mark
Convert to
°C
Conventional oven
107.2 °C
Conventional oven
225 °F

照合元：Gas mark table: 1/4 = 225 °F; Python decimal (225 − 32) × 5/9

Fan 160 °C to °F

単位換算
Oven temperature
Oven setting
160
Setting is in
Fan °C
Convert to
°F
Conventional oven
356 °F
Conventional oven
180 °C

照合元：Which? rule: fan + 20 = 180 °C conventional; 180 × 9/5 + 32

よくある質問

What is 180 °C in Fahrenheit?

356 °F, from 180 × 9/5 + 32. Recipes round it to 350 °F, which is gas mark 4, and the Which? oven conversion table puts 180 °C, 160 °C fan, 350 °F and gas mark 4 on the same row. Going the other way, 350 °F is exactly 176.7 °C.

How much lower should a fan oven be?

About 20 °C lower than the conventional temperature, according to Which?, so 180 °C becomes 160 °C fan and 200 °C becomes 180 °C fan. The fan moves hot air over the food, and leaving the setting unchanged can cook the outside too quickly. Oven makers' manuals give the figure for a specific model.

What temperature is gas mark 4?

180 °C (350 °F), or 160 °C in a fan oven. Gas mark 1 is 140 °C (275 °F) and each mark adds 25 °F, about 14 °C: gas 6 is 200 °C (400 °F) and gas 9 is 240 °C (475 °F), as listed in the Which? table. The Celsius values are rounded to the nearest 10 °C.

Can I use an 8-inch square pan instead of a 9-inch round one?

Yes. A 9-inch round pan has an area of π × 4.5² = 63.6 square inches and an 8-inch square pan has 64, so the recipe needs no change. A 9 × 13 inch pan has 117 square inches, 1.84 times the 9-inch round, so batter for the rectangle fills nearly two round pans to the same depth.

How do you adjust a recipe for a different cake tin?

Multiply every ingredient by the new tin's area divided by the old tin's area. For round tins that is the ratio of the diameters squared: moving from a 20 cm to a 23 cm tin is (23 ÷ 20)² = 1.32, so use about a third more of everything. The batter then sits at the same depth, so the baking time stays close to the original.

「Oven temperature and pan size converter」の精度はどのくらいですか？

精度は入力値と計算方法の前提に依存します。十進演算には有効数字50桁を使いますが、推定、数値計算手法、元データの精度はそれより低い場合があります。表示の丸め処理でこれらの制約がなくなるわけではありません。 独立した出典の解答と照合した計算例：9。 例えば、「350 °F → °C」はPython decimal: (350 − 32) × 5/9; gas mark 4 = 350 °F (gas mark table)と照合しています。

この計算方法の出典は何ですか？

Gas mark — conversion table (1 = 275 °F, +25 °F per mark); Which? — Oven temperature conversion table (fan ovens 20 °C lower).

この計算機について

∘F=∘C×95+32fan=∘C−20pan factor=Ayour panArecipe pan\begin{gathered}{}^\circ F = {}^\circ C \times \tfrac{9}{5} + 32 \\ \text{fan} = {}^\circ C - 20 \\ \text{pan factor} = \frac{A_{\text{your pan}}}{A_{\text{recipe pan}}}\end{gathered}

出典

  1. Gas mark — conversion table (1 = 275 °F, +25 °F per mark)
  2. Which? — Oven temperature conversion table (fan ovens 20 °C lower)

出典と照合済み

この計算機には、独立した出典の解答を使った計算例が 9 件あります。テストに組み込まれており、ここでも実行できます。

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