Temperature Converter
Instantly convert temperature readings between Celsius (°C), Fahrenheit (°F), and Kelvin (K) scales.
About Temperature Scales
Temperature quantifies the average kinetic energy of molecular vibration within a physical substance. Different scientific and consumer systems utilize different reference zero points.
Formulas
- °C to °F: (°C × 9/5) + 32
- °F to °C: (°F - 32) × 5/9
- °C to Kelvin: °C + 273.15
- Kelvin to °C: K - 273.15
Worked Example
Converting 100°C (the atmospheric boiling point of water):
- Fahrenheit: (100 × 9/5) + 32 = 212°F
- Kelvin: 100 + 273.15 = 373.15 K
Frequently Asked Questions
What is Absolute Zero?
Absolute Zero (0 K, -273.15°C, -459.67°F) is the thermodynamic threshold where all molecular vibrational entropy reaches its quantum minimum.
Why does Kelvin omit the degree symbol (°)?
Kelvin is an absolute thermodynamic unit of measure, not an arbitrary calibrated scale like Celsius or Fahrenheit.
At what point are Celsius and Fahrenheit identical?
At precisely -40° (-40°C equals -40°F).
Where is Fahrenheit officially used?
Fahrenheit remains the standard civil scale in the United States, its territories, and the Bahamas; the rest of the world uses Celsius.
Calculate in three steps
- 1Enter your valuesUse the fields above and check the units shown beside each input.
- 2Run the calculationSelect Calculate to refresh the result with your latest values.
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