A temperature written in Fahrenheit can look surprisingly high on an oven dial marked in Celsius. Convert the unit before changing the setting. The Whatson Oven Temperature Converter also keeps an entered fan adjustment separate from that unit conversion.
The Celsius to Fahrenheit relationship is fixed. A fan offset is a recipe or appliance assumption that you choose.
Tell the tool which setting the recipe gives
Enter the temperature, select Celsius or Fahrenheit, and choose whether it describes a conventional or fan setting. The fan offset field is editable; its starting value is 20°C.
That starting offset is not a claim about every oven sold in Pakistan. Use the recipe’s own conversion guidance or the relevant appliance instruction when available.
What the 180°C example actually returns
For a conventional setting of 180°C with a 20°C fan offset, the checked conventional equivalent is 356°F. The calculated fan setting is 160°C, or 320°F.
The temperature formula is °F = °C × 9/5 + 32, as described in NIST’s temperature unit guidance. The offset is subtracted in Celsius before converting the fan result.
If the entered recipe setting is already fan mode, the tool adds your offset to show its conventional counterpart. With 160°C entered as fan and the same offset, that counterpart is 180°C.
A converted setting does not predict a baking time
The result translates the chosen settings. It does not measure the actual temperature inside your oven, account for a particular tray position or decide when food is cooked.
Do not multiply baking time because you multiplied a recipe. More batter or a different pan needs a separate method check. Cake Pan Converter can compare pan geometry, but it does not supply an automatic baking time either.
Keep the original number on the worksheet
Record whether the source said conventional or fan, its temperature unit and the offset you used. “160°C fan, converted from 180°C conventional using 20°C” preserves much more information than “160” beside a cake recipe.
The converter does not provide gas marks or cooking safety temperatures. It also rejects entries that would produce a negative fan setting or an excessively high conventional setting within its stated input range.
Round the displayed result only as your oven controls require. If the dial cannot select a calculated value exactly, the arithmetic alone cannot decide the best practical setting for that recipe and appliance.