Welcome to our easy-to-use Temperature Converter. Quickly and accurately convert between Celsius (°C), Fahrenheit (°F), and Kelvin (K) temperature scales for cooking, weather forecasts, scientific calculations, and more.
Free online temperature converter. Convert between Celsius (°C), Fahrenheit (°F), and Kelvin (K) instantly. Perfect for cooking, weather, and scientific calculations. Easy to use with instant results.
The temperature conversions use these formulas:
Where:
Follow these simple steps:
The calculator will instantly provide your results with accuracy to one decimal place.
Your results include conversions between the three major temperature scales:
Our temperature conversion tool offers several advantages:
Temperature conversion is essential in many everyday situations and professional contexts:
Our calculator uses these standard temperature conversion formulas:
To convert from Celsius to Fahrenheit, multiply the Celsius temperature by 9/5 (or 1.8) and then add 32:
To convert from Fahrenheit to Celsius, subtract 32 from the Fahrenheit temperature and then multiply by 5/9:
To convert from Celsius to Kelvin, simply add 273.15 to the Celsius temperature:
To convert from Kelvin to Celsius, subtract 273.15 from the Kelvin temperature:
To convert from Fahrenheit to Kelvin, first convert to Celsius and then to Kelvin:
To convert from Kelvin to Fahrenheit, first convert to Celsius and then to Fahrenheit:
Different temperature scales were developed in different regions and for different purposes. Celsius is used in most countries for everyday measurements, Fahrenheit is primarily used in the United States, and Kelvin is the standard unit in scientific contexts. Each scale has historical origins and specific advantages for certain applications.
Most countries worldwide use the Celsius scale for everyday temperature measurements. The United States is the main exception, where Fahrenheit remains the standard for non-scientific applications. A few other countries like the Bahamas, Belize, and the Cayman Islands also commonly use Fahrenheit.
Kelvin is an absolute temperature scale that starts at absolute zero, the theoretical point where molecular motion stops. It's considered a fundamental unit in the International System of Units (SI). By convention, we say "Kelvin" rather than "degrees Kelvin" because it's defined as an absolute measure rather than relative to arbitrary points like the freezing and boiling points of water.
-40°C equals -40°F. This is the only point where the Celsius and Fahrenheit scales have the same numerical value. You can verify this by using the conversion formula: -40°C × (9/5) + 32 = -72 + 32 = -40°F.
Our temperature converter uses standard mathematical formulas for conversion and displays results to one decimal place, which is sufficient for most everyday purposes. For scientific applications requiring higher precision, the calculator still uses the exact formulas, but you may need to account for factors like atmospheric pressure that can affect temperature measurements.
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Our Temperature Converter makes it quick and easy to convert between Celsius, Fahrenheit, and Kelvin. Whether you're cooking with an international recipe, checking weather forecasts while traveling, or working on scientific calculations, this free online tool provides instant, accurate temperature conversions with no downloads required.