Temperature Conversions

Temperature conversions are used daily in cooking, weather forecasting, medicine, and science. Fahrenheit is the everyday standard in the United States; Celsius is used in science and daily life in most other countries; Kelvin, the SI base unit, is required in thermodynamics and physics because it starts at absolute zero. Each scale has distinct strengths for different applications.

  • ✓Converting Celsius to Fahrenheit for US weather reports and oven settings
  • ✓Converting Fahrenheit to Celsius for international cooking and travel
  • ✓Converting Celsius to Kelvin for thermodynamics and chemistry calculations
  • ✓Understanding body temperature readings between metric and US medical systems

Most Popular Temperature Conversions

Celsius → FahrenheitFahrenheit → CelsiusCelsius → KelvinKelvin → CelsiusFahrenheit → KelvinKelvin → Fahrenheit

All Temperature Converters

Convert from Celsius (°C)

Celsius → FahrenheitCelsius → KelvinCelsius → Rankine

Convert from Fahrenheit (°F)

Fahrenheit → CelsiusFahrenheit → KelvinFahrenheit → Rankine

Convert from Kelvin (K)

Kelvin → CelsiusKelvin → FahrenheitKelvin → Rankine

Convert from Rankine (°R)

Rankine → CelsiusRankine → FahrenheitRankine → Kelvin

Frequently Asked Questions — Temperature

What is 100°C in Fahrenheit?
100°C equals 212°F — the boiling point of water at sea level. Use the formula °F = (°C × 9/5) + 32. Other key benchmarks: 0°C = 32°F (freezing), 37°C ≈ 98.6°F (body temperature).
What is normal body temperature in Celsius and Fahrenheit?
Normal human body temperature is approximately 37°C (98.6°F). A fever is generally defined as above 38°C (100.4°F). Temperature can vary slightly by measurement site — oral, axillary, and rectal readings differ.
What is absolute zero in Celsius and Fahrenheit?
Absolute zero is the coldest possible temperature: 0 K = −273.15°C = −459.67°F. At this temperature, molecular motion theoretically stops completely. It has never been achieved in practice, but temperatures within billionths of a degree of absolute zero have been reached in laboratory settings.

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