Thermal Scale•Live Bidirectional•100% Client-Side
Temperature Converter
Accurately convert between Celsius (°C), Fahrenheit (°F), Kelvin (K), and Rankine (°R).
Celsius
°C
Metric Standard (0°C to 100°C)Fahrenheit
°F
Imperial Scale (32°F to 212°F)Kelvin
K
Scientific Thermodynamic AbsoluteRankine
°R
Absolute Fahrenheit ScaleReference Thermal Landmarks
Absolute Zero-273.15°C / -459.67°FAll molecular motion ceases
Freezing Water0°C / 32°FIce melts / water freezes at 1 atm
Room Temperature21°C / 69.8°FStandard comfortable indoor temp
Human Body37°C / 98.6°FAverage normal internal body temp
Boiling Water100°C / 212°FWater boils into steam at sea level
Conversion Formula & Standards
Conversions follow International System of Units (SI) and ISO standard constants.
°F = (°C × 9/5) + 32 | K = °C + 273.15
How to Use Temperature Converter
01
Enter a temperature value.
02
Select your source temperature scale (°C, °F, K, °R).
03
Instantly see all other temperature scales calculated side-by-side with reference thermal landmarks.
Frequently Asked Questions
At what temperature are Celsius and Fahrenheit equal?
Celsius and Fahrenheit are identical at -40° (-40°C = -40°F).
What is Absolute Zero?
Absolute Zero is the lowest possible theoretical temperature where all molecular motion ceases: 0 Kelvin (-273.15°C or -459.67°F).
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