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A stylised oven, or a temperature figure, indicating oven use.
Also known as: Oven symbol, Ovenproof symbol, Oven safe sign
An oven outline marks cookware as suitable for oven use, usually with a maximum temperature beside it. The temperature is the important part and the symbol alone tells you little.
Is not a standardised symbol. No body defines it, its drawing varies between manufacturers, and its presence is the manufacturer's own assurance rather than a certification — so the absence of the mark does not reliably mean the object is unsuitable, and its presence is not a guarantee.
Stated first rather than as a footnote, because it is the most useful thing to know about the mark. Check the manufacturer's own instructions where it matters.
Contexts: Packaging
Indicates that an item may be used in a conventional oven, drawn as a square oven outline with internal lines for shelves.
Contexts: Packaging
Almost always carries a maximum temperature, which is the operative information: an item marked oven-safe to 180°C is not oven-safe at 220°C, and the symbol without its number is close to meaningless.
Contexts: Packaging
Does not extend to a grill or broiler, where direct radiant heat is far more intense than the oven temperature suggests.
Contexts: Packaging
Is usually incomplete without a number. Ovenproof cookware carries a maximum temperature — commonly given in degrees Celsius on the base — and the symbol alone claims only that the item tolerates conventional oven heat to some unstated limit. Where a figure is given, it governs.
Contexts: Packaging
Does not extend to the grill. Radiant heat from an overhead element is far more intense and far less even than oven air, and glass and glazed ceramic rated as ovenproof routinely crack under it. Where a manufacturer permits grilling, it says so separately.
Contexts: Packaging
Related forms that are not treated as separate canonical symbols — see our variant rules.
Oven with a temperature figure
The oven outline printed with a maximum temperature, which is the form that actually tells a reader what the item will take.
A square or rectangle representing an oven, with one or two horizontal lines inside for shelves, often with a number beside it.