Oven Temperature Conversion Calculator Formula

Understand the math behind the oven temperature conversion calculator. Each variable explained with a worked example.

Use the Oven Temperature Conversion Calculator

Formulas Used

Celsius

temp_c = round((temp_f - 32) * 5 / 9)

Gas Mark

gas_mark = round((temp_f - 250) / 25)

Kelvin

temp_k = round((temp_f - 32) * 5 / 9 + 273.15)

Variables

VariableDescriptionDefault
temp_fTemperature(°F)350

How It Works

How to Convert Oven Temperatures

Formulas

  • Celsius = (Fahrenheit - 32) x 5/9
  • Gas Mark = (Fahrenheit - 250) / 25 (approximate, valid for 250-500°F)
  • Kelvin = Celsius + 273.15

    • Common Oven Temperatures

    | °F | °C | Gas Mark | Description | |-----|-----|----------|-------------| | 250 | 120 | 1 | Very Low | | 300 | 150 | 2 | Low | | 350 | 175 | 4 | Moderate | | 400 | 200 | 6 | Hot | | 450 | 230 | 8 | Very Hot |

    Worked Example

    Convert 350°F to Celsius and Gas Mark.

    temp_f = 350
    1. 01Celsius = (350 - 32) x 5/9 = 318 x 0.5556 = 176.7, rounded to 177°C.
    2. 02Gas Mark = (350 - 250) / 25 = 100 / 25 = 4.
    3. 03350°F = 177°C = Gas Mark 4.

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