Our free online unit converter tool helps you convert between length, weight, temperature and other measurements with high precision. All calculations are performed securely in your browser without any server uploads. Perfect for students, engineers, and professionals who need quick, accurate unit conversions.
You can convert between Celsius (°C), Fahrenheit (°F), and Kelvin (K). These cover all commonly used temperature scales in scientific and everyday use.
Celsius: Water freezes at 0°C and boils at 100°C. Fahrenheit: Water freezes at 32°F and boils at 212°F. Kelvin: Absolute zero is 0K (-273.15°C). Kelvin is used in scientific calculations.
The United States, its territories, and the Cayman Islands primarily use Fahrenheit. The rest of the world, including Canada, Europe, Asia, Africa, and Australia, uses Celsius. Scientific communities worldwide use both Celsius and Kelvin.
-40 degrees is the unique point where Celsius equals Fahrenheit (-40°C = -40°F). This is called the point of intersection between the two scales and is useful for quick temperature conversions.
Kelvin is an absolute temperature scale, starting at absolute zero (0K = -273.15°C), the lowest possible temperature. It's crucial in scientific calculations and doesn't use degrees (just K).
Our conversions use precise formulas: °F = (°C × 9/5) + 32 and K = °C + 273.15. Results are rounded to 2 decimal places for practical use.
Celsius and Fahrenheit can be negative (below freezing point of water). Kelvin never has negative values as it starts at absolute zero. Common example: -40°C equals -40°F.
Water freezes: 0°C = 32°F = 273.15K. Room temperature: ~20°C = ~68°F = ~293.15K. Body temperature: 37°C = 98.6°F = 310.15K. Water boils: 100°C = 212°F = 373.15K.