Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin
Temperature Converter
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About Temperature Converter
Our free online temperature converter allows you to convert between Celsius, Fahrenheit, and Kelvin instantly. Whether you're cooking, traveling internationally, studying science, or just curious about temperature conversions, this tool provides accurate results with detailed conversion formulas. Temperature conversion is essential for understanding weather forecasts, recipe temperatures, scientific calculations, and everyday temperature-related tasks. Our converter handles all major temperature scales used worldwide, making it perfect for students, travelers, chefs, scientists, and anyone needing quick temperature conversions. The tool displays conversion formulas so you can understand the math behind each conversion, helping you learn while you convert.
Key Features
Multiple Temperature Scales
Convert between Celsius (°C), Fahrenheit (°F), and Kelvin (K) with instant results. Supports all commonly used temperature scales worldwide.
Bidirectional Conversion
Convert from any temperature scale to any other. All six conversion combinations are supported with a single click.
Conversion Formulas Displayed
See the exact mathematical formula used for each conversion. Learn the relationships between temperature scales while converting.
Real-Time Results
Get instant conversion results as you type. No need to press any buttons - results update automatically.
High Precision
Calculations are accurate to multiple decimal places, perfect for scientific applications requiring precision.
Common Reference Points
Includes helpful reference temperatures like water freezing/boiling points and absolute zero for context and learning.
How to Use Temperature Converter
Enter the temperature value you want to convert in the input field
Enter the temperature value you want to convert in the input field. Follow the tool interface to complete this step.
Select the temperature scale you're converting
Select the temperature scale you're converting FROM (Celsius, Fahrenheit, or Kelvin)
Select the temperature scale you're converting TO
Select the temperature scale you're converting TO. Follow the tool interface to complete this step.
View instant conversion results with the formula used
View instant conversion results with the formula used. Follow the tool interface to complete this step.
See all conversions simultaneously
the tool shows conversions to all other scales
Frequently Asked Questions
What is the formula to convert Celsius to Fahrenheit?
To convert Celsius to Fahrenheit, multiply by 9/5 (or 1.8) and add 32. The formula is: °F = (°C × 9/5) + 32. For example, 20°C equals (20 × 1.8) + 32 = 68°F.
What is the formula to convert Fahrenheit to Celsius?
To convert Fahrenheit to Celsius, subtract 32 and then multiply by 5/9. The formula is: °C = (°F - 32) × 5/9. For example, 68°F equals (68 - 32) × 5/9 = 20°C.
How do I convert Celsius to Kelvin?
Converting Celsius to Kelvin is simple: just add 273.15. The formula is: K = °C + 273.15. For example, 0°C equals 273.15 K. This is because 0 Kelvin (absolute zero) equals -273.15°C.
Why do scientists use Kelvin instead of Celsius?
Kelvin is the SI base unit for temperature and starts at absolute zero (the coldest possible temperature). It's preferred in scientific calculations because it has no negative numbers and ratios are meaningful. For example, 200K is exactly twice as hot as 100K.
At what temperature are Celsius and Fahrenheit equal?
Celsius and Fahrenheit scales meet at -40 degrees. This means -40°C equals -40°F. This is the only point where the two scales show the same numerical value.
What is absolute zero in different scales?
Absolute zero is 0 Kelvin, -273.15°C, or -459.67°F. This is the theoretical lowest possible temperature where all molecular motion stops. Nothing can be colder than absolute zero.
Can I convert negative temperatures?
Yes! Our converter handles negative temperatures perfectly. Negative values are common in Celsius and Fahrenheit (below freezing), but Kelvin never goes negative since it starts at absolute zero.
How accurate is this temperature converter?
Our converter is mathematically precise, calculating results to multiple decimal places. The accuracy is more than sufficient for cooking, weather, science, and engineering applications.
Use Cases
- International Cooking: Convert recipe temperatures between Celsius and Fahrenheit. European recipes often use Celsius while American recipes use Fahrenheit. Perfect for baking and roasting.
- Weather Understanding: Understand weather forecasts when traveling internationally. Convert temperatures to your familiar scale to know what to expect and how to dress.
- Science and Education: Convert temperatures for chemistry, physics, and biology experiments. Kelvin is commonly used in scientific contexts, requiring frequent conversions from Celsius.
- HVAC and Engineering: Engineers working with heating, ventilation, and air conditioning systems need to convert between temperature scales for equipment specifications and calculations.
- Medical Applications: Healthcare professionals may need to convert body temperature readings between Celsius and Fahrenheit depending on equipment and location.