Gas mark

The draft 2003 edition of the Oxford English Dictionary lists the earliest known usage of the concept as being in L. Chatterton's book Modern Cookery published in 1943: "Afternoon tea scones… Time: 20 minutes.

The term "gas mark" was a subject of the joint BBC/OED production Balderdash and Piffle, in May 2005.

The earliest printed evidence of use of "gas mark" (with no other terms between the two words) appears to date from 1958.

[citation needed] Oven temperatures increase by 25 °F (14 °C) for each gas mark step.

In theory, the following formulae can be used to convert between gas mark values and Celsius.

The numbers in the conversion table below represent values that would actually be given in a recipe or set on a stove.

[5] In Germany, "Stufe" (the German word for "step") is used for gas cooking temperatures.