Temperature Converter
Convert Celsius to Fahrenheit, Fahrenheit to Celsius, and Kelvin. Includes formulas and common reference points.
Our free Temperature Converter converts between Celsius, Fahrenheit, and Kelvin instantly. Whether you are converting a recipe from a European cookbook (200 degrees C to F), checking the weather forecast while traveling abroad, understanding a… Use the fields above to enter values and get an instant answer. All processing happens on your device.
About This Calculator
Our free Temperature Converter converts between Celsius, Fahrenheit, and Kelvin instantly. Whether you are converting a recipe from a European cookbook (200 degrees C to F), checking the weather forecast while traveling abroad, understanding a scientific paper that uses Kelvin, or setting your thermostat to a different scale, this tool gives you an accurate result in one click. It also shows the conversion formula used so you can learn and verify the math yourself.
How It Works
Temperature conversion uses specific formulas rather than simple multiplication factors. Celsius to Fahrenheit: F = (C x 9/5) + 32. Fahrenheit to Celsius: C = (F - 32) x 5/9. Celsius to Kelvin: K = C + 273.15. Kelvin to Celsius: C = K - 273.15. Fahrenheit to Kelvin: convert to Celsius first, then add 273.15. The calculator applies the correct formula based on your source and target scales.
How to Use
- Enter your values in the calculator fields above
- Click the calculate button or let the calculator auto-update
- Review your results instantly
- Adjust values as needed to see different scenarios
Frequently Asked Questions
How do I convert Celsius to Fahrenheit?
Multiply by 9/5 (or 1.8), then add 32. For example, 25 degrees C = (25 x 1.8) + 32 = 77 degrees F. Quick reference points: 0 degrees C = 32 degrees F (freezing), 100 degrees C = 212 degrees F (boiling), 37 degrees C = 98.6 degrees F (body temperature).
What is the difference between Celsius and Fahrenheit?
Celsius sets 0 at the freezing point and 100 at the boiling point of water — logical and easy to remember. Fahrenheit sets 32 for freezing and 212 for boiling, giving finer granularity for weather temperatures. Celsius is used by most of the world and all scientific work; Fahrenheit is used primarily in the US for weather and cooking.
When do I need Kelvin?
Kelvin is the SI unit for temperature, used in physics, chemistry, engineering, and astronomy. It starts at absolute zero (0 K = -273.15 degrees C), the theoretical lowest temperature where molecular motion stops. Room temperature is about 293-298 K. You rarely need Kelvin in everyday life, but it is essential for scientific calculations.
What oven temperature is 180 degrees C in Fahrenheit?
180 degrees C = 356 degrees F, which rounds to 350 degrees F — the most common oven setting in American recipes. Other common conversions: 160 degrees C = 320 degrees F, 200 degrees C = 392 degrees F (use 400 degrees F), 220 degrees C = 428 degrees F (use 425 degrees F).
Is there a temperature where Celsius and Fahrenheit are the same?
Yes: -40 degrees. At -40, both scales read the same value. This is a fun math fact: setting C = F in the formula F = (C x 9/5) + 32 and solving gives -40.
Why Use Our Free Temperature Converter Online?
Our Temperature Converter uses standard formulas and works in your browser—no install or sign-up. Use it for homework, travel, or everyday conversions. Results are instant and we don't collect your inputs. Explore our other math and unit converters from the link below.