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Oven Temperature Converter

Everyday

Convert oven temperature between Celsius, Fahrenheit, and UK gas mark instantly. Get the right setting for any recipe, whether it's in degrees or gas mark.

Reviewed by the thecalcu.com team · Last updated July 10, 2026

Gas Mark 2 — Slow
Gas MarkCelsiusFahrenheit
2150°C302°F
Full Oven Temperature Chart
Gas Mark°C°FDescription
0.25110°C230°FVery Slow
0.5120°C248°FVery Slow
1140°C284°FSlow
2150°C302°FSlow
3170°C338°FModerate
4180°C356°FModerate
5190°C374°FModerate Hot
6200°C392°FModerately Hot
7220°C428°FHot
8230°C446°FHot
9240°C464°FVery Hot

What is a Oven Temp?

An Oven Temperature Converter translates a cooking temperature between Celsius, Fahrenheit, and UK gas mark, the three scales most commonly printed on recipes and oven dials. Gas mark, in particular, causes confusion for anyone using a recipe from a different country or an older cookbook, since it's a numbered scale (1/4 through 9) rather than a direct temperature reading.

This converter uses the standard UK gas mark reference table to convert accurately in both directions, so a recipe written in gas mark can be followed on a Fahrenheit-only oven, and vice versa. It's a companion to the general-purpose Temperature Converter, built specifically for cooking and baking rather than scientific or weather-related conversions.

Why Use an Oven Temperature Converter?

Recipes from different sources rarely agree on a temperature scale, a classic British baking recipe might say "gas mark 4," a US recipe says "350°F," and a European one says "180°C." Getting the conversion wrong by even one gas mark can mean a cake bakes too fast on the outside before the centre sets, or a roast doesn't brown properly.

This converter removes the guesswork of manually cross-referencing a printed gas mark chart. It's especially useful when following a recipe from the Cooking Measurement Converter or US Cooking Measurement Converter that handles ingredient quantities but not oven temperature, pairing the two covers a complete international recipe conversion.

Who Should Use This Converter?

  • Home bakers following recipes from cookbooks or websites that use a different temperature scale than their oven displays.
  • UK home cooks with older gas ovens that only show gas mark numbers, needing to follow a Celsius- or Fahrenheit-based recipe.
  • International recipe bloggers and cookbook authors who need to provide accurate conversions for readers using different oven types.
  • People who've recently moved countries and are getting used to an oven that displays a different temperature scale than the recipes they grew up with.
  • Anyone batch-converting a recipe for sharing, alongside ingredient conversions from the Cooking Measurement Converter.

What Insights Does the Oven Temperature Converter Give You?

The converter shows the exact equivalent of your oven temperature across all three scales used in cooking:

  • Celsius (°C), the standard scale used in most of the world outside the US, including most modern UK oven dials.
  • Fahrenheit (°F), the standard scale used in US recipes and most American ovens.
  • UK Gas Mark, the numbered scale found on older British gas ovens and many traditional UK recipes.

Since gas mark doesn't increase by a fixed number of degrees at every step, the converter uses the actual published reference table rather than a simple formula, so the result stays accurate at both the low and high ends of the scale.

How to use this Oven Temp calculator

  1. Find the temperature stated in your recipe, it may be written as a gas mark number, or in °C or °F.
  2. Select the matching unit in the From dropdown, UK Gas Mark, Celsius, or Fahrenheit.
  3. Enter the value from your recipe.
  4. Select the scale your own oven uses in the To dropdown.
  5. Read the converted temperature and set your oven accordingly.
  6. Use the swap (⇅) button if you need to convert in the opposite direction for a future recipe.
Show formula & methodology ↓Show less ↑

Formula & Methodology

Celsius and Fahrenheit convert using the standard formula:

°F = (°C × 9⁄5) + 32

Gas mark does not follow a single linear formula across its full range, so the converter maps values against the standard UK reference table:

| Gas Mark | °C | °F |
|---|---|---|
| 1/4 | 110 | 225 |
| 1/2 | 120 | 250 |
| 1 | 140 | 275 |
| 2 | 150 | 300 |
| 3 | 170 | 325 |
| 4 | 180 | 350 |
| 5 | 190 | 375 |
| 6 | 200 | 400 |
| 7 | 220 | 425 |
| 8 | 230 | 450 |
| 9 | 240 | 475 |

Worked example: A recipe calling for gas mark 5 converts to 190°C, which is 375°F using the standard formula above.

Frequently Asked Questions

What is gas mark in oven temperature?
Gas mark is a numbered scale (typically 1/4 through 9) used on older and UK-style gas ovens to indicate temperature, instead of a direct Celsius or Fahrenheit reading. It originated from the dial settings on early gas cookers and is still printed on many UK recipes and oven dials today.
What is gas mark 4 in Celsius and Fahrenheit?
Gas mark 4 corresponds to 180°C or 350°F, one of the most common baking temperatures used for cakes and general oven cooking. This converter handles every standard gas mark from 1/4 up to 9 in both directions.
How do I convert Celsius to gas mark?
Select Celsius as the From unit and UK Gas Mark as the To unit, then enter your recipe's stated temperature. The converter matches it against the standard UK gas mark reference table and returns the equivalent gas mark setting.
Is gas mark the same as Fahrenheit divided by 25?
Roughly, yes, for the most common range, many gas marks sit close to (Fahrenheit − 25) ÷ 25, but the relationship isn't perfectly uniform across the full scale. This converter uses the official reference table rather than an approximation formula, so results stay accurate even at the lower and higher ends of the scale.
What is the difference between this and the Temperature Converter?
The [Temperature Converter](/temperature-converter/) handles general-purpose conversions between Celsius, Fahrenheit, Kelvin, and other scientific scales. This Oven Temperature Converter is purpose-built for cooking, adding UK gas mark, a scale the general temperature converter doesn't include, alongside Celsius and Fahrenheit.
Why do UK and US recipes use different oven temperature scales?
UK recipes traditionally use gas mark because older British gas ovens were calibrated with numbered dials rather than a temperature readout, while US recipes almost always use Fahrenheit. Modern UK ovens often show all three scales on the dial, but printed recipes still vary depending on the source.
What temperature is gas mark 6 for roasting?
Gas mark 6 is 200°C or 400°F, a common setting for roasting vegetables and meats that need a hotter oven than standard baking. Many UK roasting recipes specify gas mark 6 or 7 depending on how much browning is wanted.
Can I use this converter for fan-assisted (convection) ovens?
This converter gives the standard (non-fan) oven temperature for each gas mark, Celsius, or Fahrenheit value. If your oven is fan-assisted, most manufacturers recommend reducing the converted temperature by about 20°C (or roughly one gas mark), so check your oven's manual for its specific guidance.
What is the lowest and highest gas mark on this converter?
The converter covers the full standard range from gas mark 1/4 (110°C / 225°F), used for very low slow-cooking temperatures, up to gas mark 9 (240°C / 475°F), used for high-heat baking and pizza ovens.
Does this work for converting recipe temperatures from cookbooks?
Yes, this is exactly the use case it's built for. Enter the temperature exactly as printed in your recipe (whether it's a gas mark number, Celsius, or Fahrenheit value) and convert it to whatever scale your oven uses.
Also known as
gas mark convertergas mark to celsiusgas mark to fahrenheitoven temperature chartUK oven temperaturefan oven temperature convertergas mark 4 in celsiusoven temperature guideconvection oven converter