Temperature Converter | Online Celsius/Fahrenheit/Kelvin Temperature Unit Conversion Tool
Instantly convert between Celsius, Fahrenheit, Kelvin and other temperature units with scientific-grade high-precision calculation, professional temperature conversion tool.
Temperature Converter
Convert between Celsius, Fahrenheit, Kelvin and other temperature units
Adjust decimal places (0-15 digits)
All Temperature Scale Conversions
Conversion History
Common Temperature Examples
Click any example to see the conversion
Water Freezing
0°C
Water Boiling
100°C
Body Temperature
37°C
Room Temperature
20°C
Absolute Zero
0 K
Oven Temperature
350°F
What is Temperature Conversion?
Temperature units are standards for measuring the degree of hotness or coldness of objects. Different temperature scales serve different applications: Celsius is widely used in daily life and scientific research; Fahrenheit is used in the United States and other countries; Kelvin is the thermodynamic temperature unit in the International System of Units; Rankine, Réaumur, Delisle and other historical temperature scales still have applications in specific fields.
Temperature unit systems are standardized frameworks established by humans to accurately measure and describe the degree of hotness or coldness. From absolute zero to stellar interior temperatures, different temperature scales serve different measurement needs and application scenarios.
Common Temperature Units
Celsius (°C)
Celsius, Fahrenheit
Scientific Temperature Units
Kelvin (K)
Kelvin, Rankine
Historical Temperature Units
Réaumur (°Ré)
Réaumur, Delisle
Why do we need different temperature units?
Scientific Research
Physics and chemistry experiments use Kelvin absolute temperature to ensure accuracy of thermodynamic calculations
Cooking & Baking
Recipes from different countries use different temperature units, requiring accurate conversion to ensure cooking results
Weather Forecasting
Global meteorological data exchange and travel require understanding temperature representations in different regions
Engineering Applications
Industrial process control, materials science, energy engineering require precise temperature measurement and conversion
Key Features
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Precise temperature measurement is the foundation of scientific research, industrial production, medical diagnosis, and weather forecasting. Unified temperature standards ensure global scientific communication and technical cooperation. Modern temperature standards are based on thermodynamic laws, ensuring extremely high precision and stability.
Common Use Cases
Scientific Research
Physics and chemistry experiments require precise temperature control and data recording, different experiments may use different temperature units.
Cooking & Baking
International recipes use different temperature units, requiring accurate conversion to ensure cooking results.
Weather Forecasting
Global meteorological data exchange and travel require understanding temperature representations in different regions.
Engineering Applications
Industrial process control, materials science, energy engineering require precise temperature measurement and conversion.
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In today's globalized world, different countries and industries use different temperature unit systems. Scientists use Kelvin for research, engineers need to convert between Celsius and Fahrenheit, chefs need to understand baking temperatures in different scales, making accurate temperature conversion crucial.
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Temperature conversion involves precise mathematical formulas and constants. Traditional floating-point calculations may produce precision errors, especially in scientific calculations. Therefore, we use professional high-precision calculation libraries to ensure the accuracy of conversion results.
Technical Details
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Frequently Asked Questions
What temperature units does the converter support?
Supports 6 major temperature units: Celsius (°C), Fahrenheit (°F), Kelvin (K), Rankine (°R), Réaumur (°Ré), Delisle (°De).
How is temperature conversion accuracy ensured?
Uses decimal.js high-precision calculation library to ensure conversion results accurate to 15 decimal places, avoiding JavaScript native floating-point precision errors.
What is absolute zero?
Absolute zero is the theoretical lowest temperature, corresponding to 0 Kelvin (-273.15°C or -459.67°F), where molecular motion completely stops.
What's the difference between Celsius and Fahrenheit?
Celsius uses water's freezing point (0°C) and boiling point (100°C) as reference; Fahrenheit uses specific salt water mixture's freezing point (0°F) and human body temperature (about 96°F) as reference.
Why do scientific research use Kelvin?
Kelvin is an absolute temperature unit, starting from absolute zero, convenient for thermodynamic calculations and scientific research, and is a base unit of the International System of Units.