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Oven Temperature and Gas Mark Converter

Convert Celsius, Fahrenheit and named gas settings, or compare an oven dial with a thermometer reading using the correct units.

Use this result well

Inputs that matter
Temperature or gas mark, Convert from, Oven setting, Setting unit, and 2 more
Output to expect
Converted temperature, Measured difference
  • Check the units and required inputs before comparing results.
  • Keep the assumptions with a copied result so you can reproduce the calculation later.
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Reference & details

How it works

Convert temperature units

Convert an absolute temperature with °F = °C × 1.8 + 32. Celsius values shown beside gas settings are calculated from their Fahrenheit anchors, so they can differ from rounded culinary charts.

Source: NIST: SI Units – Temperature

Use named gas settings

AEG lists quarter and half marks separately, followed by whole marks 1–10. This tool uses its Fahrenheit anchors, including 520°F at mark 10. Values between entries are bracketed; no new dial position is invented.

Source: AEG: Gas Mark temperature table

Compare a thermometer with the dial

Convert both readings to the same scale and subtract set temperature from measured temperature. For a temperature difference, multiply Celsius degrees by 1.8 without adding 32.

Source: NIST: SI Units – Temperature

Record the limits of one observation

A single difference depends on the thermometer, oven position, cycling and mode. Follow the appliance instructions for repeat measurements and calibration. The calculator does not apply a universal fan reduction or select a hardware adjustment.

Updated: 2026-09-07

Example Scenarios

Look up Gas Mark ¼ as 225°F and calculate its Celsius equivalent.

Convert 180°C to 356°F and see that it lies between the listed marks 4 and 5.

Compare a 180°C setting with a 374°F reading and save the observed 10°C / 18°F difference.

Common Mistakes to Avoid

Using one linear equation for every gas mark

Look up the named entries, especially ¼, ½ and the upper end of the selected table.

Adding 32 to a temperature difference

Offsets are intervals: 10°C of difference equals 18°F of difference.

Treating a converted value as an exact oven or fan setting

Check the recipe and appliance. A nominal setting and an observed thermometer reading are different quantities.

FAQ

Choose Gas Mark and enter 0.25 or 0.5. The AEG Fahrenheit anchors are 225°F and 250°F respectively.

Recipe charts often round temperatures. This tool calculates Celsius from the selected Fahrenheit table anchor instead of mixing rounded values from different charts.

Only listed settings are accepted. For a temperature between table entries, enter °C or °F to see the two surrounding named settings.

Inputs remain in their modes while the page stays open. Save a thermometer comparison if you want it in local calculation history.

It records one comparison. Follow the manufacturer’s procedure for calibration and repeat observations; do not apply one difference across every setting automatically.

About Oven Temperature and Gas Mark Converter

Choose a calculation mode for recipe temperature conversion or an observed oven reading. Celsius and Fahrenheit use exact unit arithmetic; gas settings use a named manufacturer table. Inputs remain available while switching modes.