Temperature Converter
The temperature converter allows you to quickly and accurately convert between Celsius, Fahrenheit, and Kelvin. Whether you're checking weather forecasts, cooking, or working in science, this tool handles the math instantly.
Temperature conversion is one of the most common daily calculations. With Celsius used in most of the world and Fahrenheit in the United States, knowing how to convert between them is essential for travel, cooking, and international communication.
How it works
Temperature conversions use specific formulas rather than simple multiplication factors. To convert Celsius to Fahrenheit: °F = °C × 9/5 + 32. To convert Celsius to Kelvin: K = °C + 273.15. To convert Fahrenheit to Celsius: °C = (°F − 32) × 5/9. All conversions go through Celsius as an intermediate step.
Use cases
- Converting weather forecasts between Celsius and Fahrenheit
- Adjusting cooking and baking temperatures for international recipes
- Scientific calculations requiring Kelvin or Celsius
- Understanding body temperature readings in different scales
Frequently asked questions
How do you convert Celsius to Fahrenheit?
Multiply the Celsius temperature by 9/5 and then add 32: °F = °C × 9/5 + 32. For example, 20°C becomes 20 × 9/5 + 32 = 68°F. A quick mental shortcut is to double the Celsius value and add 30 for a rough estimate.
What is 37 degrees Celsius in Fahrenheit?
37°C equals 98.6°F, which is the commonly cited normal human body temperature. Using the formula, 37 × 9/5 + 32 = 98.6. This is why a reading of 98.6°F on a Fahrenheit thermometer corresponds to a healthy baseline.
How do you convert Fahrenheit to Celsius?
Subtract 32 from the Fahrenheit temperature and multiply the result by 5/9: °C = (°F − 32) × 5/9. For example, 100°F becomes (100 − 32) × 5/9 = 37.8°C. This is the exact inverse of the Celsius-to-Fahrenheit formula.
What is Kelvin and how does it relate to Celsius?
Kelvin is the SI base unit of temperature, starting at absolute zero (0 K), the point where molecular motion stops. It uses the same degree size as Celsius, so you convert simply by adding 273.15: K = °C + 273.15. For example, 0°C equals 273.15 K.
At what temperature are Celsius and Fahrenheit equal?
Celsius and Fahrenheit read the same value at −40 degrees, so −40°C equals −40°F. This is the single point where the two scales intersect, which you can confirm by solving °C = °C × 9/5 + 32.