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 scales are supported?
Our tool converts between Celsius (°C), Fahrenheit (°F), Kelvin (K), and Rankine (°R) with high precision.
What's the difference between Celsius and Kelvin?
Kelvin is an absolute temperature scale starting at absolute zero (-273.15°C). Celsius is relative to water's freezing/boiling points.
When should I use Fahrenheit vs Celsius?
Celsius is used worldwide and in science. Fahrenheit is primarily used in the United States. Kelvin is used in scientific calculations.
What is absolute zero?
Absolute zero is 0 Kelvin (-273.15°C or -459.67°F), the theoretical temperature where all molecular motion stops.
How accurate are the conversions?
Our conversions use precise mathematical formulas and display results to multiple decimal places for scientific accuracy.