243 degrees Fahrenheit = 117.22°C (390.37 K). Use the copy buttons below for any format, or enter a custom value in the converter.
Fahrenheit is the primary temperature scale in the United States, while Celsius is the international standard used by the rest of the world and all scientific disciplines. To convert Fahrenheit to Celsius, subtract 32 then multiply by 5/9: °C = (°F − 32) × 5/9. For 243°F: (243 − 32) × 5/9 = 117.22°C. Kelvin — used in science — adds 273.15 to the Celsius result: 117.22°C + 273.15 = 390.37 K.
243°F
117.22°C
390.37 K
Celsius
117.22°C
Kelvin
390.37 K
Full (°F to °C)
243°F = 117.22°C
Full (°F to K)
243°F = 390.37 K
Enter any Fahrenheit value to convert it live to Celsius and Kelvin.
Three practical situations where knowing that 243°F = 117.22°C makes a real difference.
A US recipe calls for a 243°F oven — that's 117.22°C. If your oven shows only Celsius (common in Europe and most of the world), set it to 117.22°C. At this temperature you're in the low-to-moderate baking range, suitable for slow roasting, bread proofing, and delicate pastries.
243°F (117.22°C) is outside the range of typical daily weather. You'd encounter this in extreme climate science, industrial contexts, or laboratory settings.
In physics or chemistry, temperatures are often given in Fahrenheit in US textbooks but need to be expressed in Celsius or Kelvin for formulas. 243°F = 117.22°C = 390.37 K. Kelvin is required for thermodynamic equations like the ideal gas law (PV = nRT) since it starts at absolute zero (0 K = −459.67°F). Converting 243°F: (243 − 32) × 5/9 + 273.15 = 390.37 K.
See how 243°F compares to nearby temperatures in both Fahrenheit and Celsius.
Common questions about 243°F and its Celsius equivalent, answered.