Temperature Converter
Convert temperatures between degrees Celsius, degrees Fahrenheit and Kelvin, including negative values, with results rounded to two decimal places.
Note: These calculations are for informational purposes only and do not replace professional tax or financial advice. All information without guarantee.
FAQ
Frequently Asked Questions
How do I convert between Celsius and Fahrenheit?
Celsius to Fahrenheit: multiply by 9/5 (or 1.8) and add 32. Fahrenheit to Celsius: subtract 32 and multiply by 5/9. Key points: 0C = 32F, 100C = 212F, 37C = 98.6F.
What is the Kelvin scale?
Kelvin is the SI unit for temperature. It starts at absolute zero (-273.15 Celsius). To convert: Kelvin = Celsius + 273.15. Water freezes at 273.15 K and boils at 373.15 K.
How do I convert a temperature difference to Fahrenheit?
Not with the normal conversion formula. The converter converts absolute temperatures and adds 32 degrees in the process, so 10 °C becomes 50 °F. For a difference that offset does not apply: a rise of 10 °C equals 18 °F (factor 1.8) and exactly 10 K. So multiply temperature differences by 1.8 (or divide °F differences by 1.8) instead of entering them in the converter. Absolute values are shown to two decimal places, e.g. 350 °F = 176.67 °C.
Guide
What is the Temperature Converter?
The temperature converter converts between Celsius, Fahrenheit and Kelvin.
How does the Temperature Converter work?
Enter the temperature and source unit. The calculator converts to the other two units. Formulas: F = C * 9/5 + 32. K = C + 273.15.
Key Data and Facts
Freezing point of water: 0 C = 32 F = 273.15 K. Boiling point: 100 C = 212 F = 373.15 K. Body temperature: 37 C = 98.6 F. Absolute zero: -273.15 C = 0 K.
Step-by-Step Guide
How to use the temperature converter step by step: 1. Choose the source unit – Celsius (deg C), Fahrenheit (deg F) or Kelvin (K). 2. Enter a value – the calculator instantly converts it into the other two units. 3. Formulas: Celsius to Fahrenheit: deg F = deg C * 9/5 + 32. Fahrenheit to Celsius: deg C = (deg F - 32) * 5/9. Celsius to Kelvin: K = deg C + 273.15. 4. Important reference points: freezing point of water = 0 deg C = 32 deg F = 273.15 K. Boiling point of water = 100 deg C = 212 deg F. Body temperature = 37 deg C = 98.6 deg F. 5. The crossover point: -40 deg C = -40 deg F (both scales meet). 6. Common uses: converting weather reports from the USA (e.g. 77 deg F = 25 deg C), adapting baking recipes (350 deg F = 177 deg C), measuring fever (from 38 deg C = 100.4 deg F counts as a fever). Tip: quick estimate deg F to deg C: (deg F - 30) / 2.
Calculation Example
72 °F in Celsius: (72 - 32) * 5/9 = 22.2 °C. 37 °C in Fahrenheit: 37 * 9/5 + 32 = 98.6 °F.
Sources
Official sources
Calculations are based on applicable German laws and official data:
Full methodology at Methodology.
Reviewed by Konstantin Iakovlev · Last updated:
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