Celsius to Fahrenheit
°F = (°C × 9/5) + 32
Temperature converter
Temperature Converter
Free online temperature converter for Celsius, Fahrenheit, Kelvin, and Rankine. Get instant results with formulas, step-by-step calculations, copy buttons, and shareable links.
Free Browser-only Celsius, Fahrenheit, Kelvin, Rankine Formula + steps
Paste values like 37°C, 98.6 F, -40, or 273.15 K.
Common examples
Temperature Conversion Examples
Convert Temperature Online
Use this temperature converter to convert Celsius, Fahrenheit, Kelvin, and Rankine instantly. Enter a temperature, choose the from and to units, and the calculator shows the answer, formula, and step-by-step calculation.
The conversion runs in your browser. Your typed value is not uploaded to a server, and only your selected units and precision preference can be saved locally.
How to Use the Temperature Converter
- 1 Enter a temperature value, such as 100, 37°C, 98.6 F, or 273.15 K.
- 2 Select the source unit and target unit.
- 3 Read the converted result, formula, and step calculation.
- 4 Copy the result, copy the formula, swap units, reset the calculator, or copy a share link.
Temperature Conversion Formulas
Fahrenheit to Celsius
°C = (°F - 32) × 5/9
Celsius to Kelvin
K = °C + 273.15
Kelvin to Celsius
°C = K - 273.15
Fahrenheit to Kelvin
K = (°F + 459.67) × 5/9
Rankine to Kelvin
K = °R × 5/9
Celsius to Fahrenheit
To convert Celsius to Fahrenheit, multiply the Celsius value by 9/5 and add 32. For example, 100°C equals 212°F.
Fahrenheit to Celsius
To convert Fahrenheit to Celsius, subtract 32 from the Fahrenheit value and multiply by 5/9. For example, 98.6°F equals 37°C.
Celsius to Kelvin
To convert Celsius to Kelvin, add 273.15. For example, 0°C equals 273.15 K.
Kelvin to Celsius
To convert Kelvin to Celsius, subtract 273.15. Kelvin values below 0 are invalid because Kelvin is an absolute temperature scale.
Common Temperature Conversion Table
| Temperature | Celsius | Fahrenheit | Kelvin | Rankine |
|---|---|---|---|---|
| Absolute zero | -273.15°C | -459.67°F | 0 K | 0°R |
| Water freezes | 0°C | 32°F | 273.15 K | 491.67°R |
| Room temperature | 20°C | 68°F | 293.15 K | 527.67°R |
| Body temperature | 37°C | 98.6°F | 310.15 K | 558.27°R |
| Water boils | 100°C | 212°F | 373.15 K | 671.67°R |
About Celsius, Fahrenheit, Kelvin, and Rankine
Celsius is widely used for everyday temperature, Fahrenheit is common in the United States, Kelvin is used in science as an absolute scale, and Rankine is an absolute Fahrenheit-based scale used in some engineering contexts.
Absolute Zero Validation
The converter rejects values below absolute zero: -273.15°C, -459.67°F, 0 K, and 0°R. Values at absolute zero are valid.
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Temperature Converter FAQ
What is a temperature converter?
A temperature converter changes a temperature value from one scale to another, such as Celsius to Fahrenheit, Fahrenheit to Celsius, Celsius to Kelvin, or Kelvin to Celsius.
How do I convert Celsius to Fahrenheit?
Use the formula °F = (°C × 9/5) + 32. For example, 100°C equals 212°F.
How do I convert Fahrenheit to Celsius?
Use the formula °C = (°F - 32) × 5/9. For example, 98.6°F equals 37°C.
How do I convert Celsius to Kelvin?
Use the formula K = °C + 273.15. For example, 0°C equals 273.15 K.
Can Kelvin be negative?
No. Kelvin is an absolute temperature scale, so values below 0 K are physically invalid for this converter.
Does this temperature converter store my value?
No. The conversion runs in your browser. The tool can remember only selected units and precision in localStorage, not the temperature value you enter.
Can I share a temperature conversion?
Yes. Use the copy share link button to create a URL with value, from unit, to unit, and precision parameters.
Does this converter support Rankine?
Yes. It supports Celsius, Fahrenheit, Kelvin, and Rankine, including Rankine absolute-zero validation.