Temperature Converter

Convert temperature units in real-time and view all units simultaneously.

Celsius (°C)

Fahrenheit (°F)

Kelvin (K)

Conversion Formulas

°F = (°C × 9/5) + 32 °C = (°F - 32) × 5/9 K = °C + 273.15 °C = K - 273.15

Common Temperature References

Temperature	Celsius (°C)	Fahrenheit (°F)	Kelvin (K)
Absolute Zero	-273.15	-459.67	0
Water Freezing Point	0	32	273.15
Room Temperature	20	68	293.15
Body Temperature	37	98.6	310.15
Water Boiling Point	100	212	373.15

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Más información

History and Understanding of Temperature Units

Celsius (°C) was developed in 1742 by Swedish scientist Anders Celsius, defining water's freezing point as 0 degrees and boiling point as 100 degrees. It is the standard temperature unit used daily in most countries worldwide. Fahrenheit (°F) was developed in 1724 by German physicist Daniel Gabriel Fahrenheit, defining water's freezing point as 32 degrees and boiling point as 212 degrees. It is used in the United States, Myanmar, and Liberia. Kelvin (K) is an absolute temperature unit proposed by Lord Kelvin in 1848. It defines absolute zero (the temperature at which molecular motion completely stops) as 0K and is primarily used in scientific research.

Celsius-Fahrenheit Conversion Formulas

The formula to convert Celsius to Fahrenheit is °F = (°C × 9/5) + 32. For example, to convert 25°C to Fahrenheit: (25 × 9/5) + 32 = 45 + 32 = 77°F. Conversely, the formula to convert Fahrenheit to Celsius is °C = (°F - 32) × 5/9. To convert 86°F to Celsius: (86 - 32) × 5/9 = 54 × 5/9 = 30°C.

Understanding Kelvin and Absolute Temperature

Kelvin is an absolute temperature unit based on absolute zero (0K = -273.15°C). The formula to convert Celsius to Kelvin is very simple: K = °C + 273.15. Room temperature of 25°C is 298.15K. The Kelvin unit does not use the degree (°) symbol and has no negative values.

Comparison of Major Temperature Reference Points

Absolute zero is -273.15°C, -459.67°F, 0K. Water's freezing point is 0°C, 32°F, 273.15K. Room temperature (20-25°C) is 68-77°F, 293-298K. Normal human body temperature is 36.5-37.5°C, 97.7-99.5°F, 309.65-310.65K.

Temperature in Daily Life

Temperature is crucial in cooking. Oven recipes are usually displayed in Fahrenheit (350°F ≈ 177°C), but Korean ovens use Celsius, requiring conversion. Safe cooking temperatures for meat are chicken 74°C (165°F), beef well-done 71°C (160°F).

Temperature Scales in Scientific Research

Scientific papers and research primarily use Kelvin. According to the third law of thermodynamics, at absolute zero (0K), the entropy of a perfect crystal is 0. The lowest temperature achieved in laboratories is about 0.0000000001K (100 picokelvin), recorded by MIT researchers in Bose-Einstein condensate experiments.