Celsius to Fahrenheit
°F = (°C × 1.8) + 32
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Free Temperature Converter
Temperature Converter Convert °C, °F, K & °R Instantly
Convert Celsius, Fahrenheit, Kelvin and Rankine temperatures quickly with formulas, reverse conversions and common reference values.
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Celsius
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Fahrenheit
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Kelvin
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Rankine
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Quick Reference
Common Temperature Conversions
Useful reference values across Celsius, Fahrenheit and Kelvin scales.
| Reference | Celsius | Fahrenheit | Kelvin |
|---|---|---|---|
| Absolute zero | -273.15 °C | -459.67 °F | 0 K |
| Water freezing reference | 0 °C | 32 °F | 273.15 K |
| Cool room | 20 °C | 68 °F | 293.15 K |
| Warm day | 30 °C | 86 °F | 303.15 K |
| Celsius/Fahrenheit intersection | -40 °C | -40 °F | 233.15 K |
| Water boiling reference | 100 °C | 212 °F | 373.15 K |
Conversion Formulas
Temperature Conversion Formulas
Common formulas used to convert between Celsius, Fahrenheit and Kelvin.
Fahrenheit to Celsius
°C = (°F - 32) ÷ 1.8
Celsius to Kelvin
K = °C + 273.15
Kelvin to Celsius
°C = K - 273.15
Fahrenheit to Kelvin
K = (°F - 32) ÷ 1.8 + 273.15
Kelvin to Fahrenheit
°F = (K - 273.15) × 1.8 + 32
Simple Process
How to Use the Temperature Converter
Enter Temperature
Type the temperature value you want to convert.
Select Scales
Choose the original temperature scale and your target scale.
View the Result
Get the converted temperature, formula and equivalent scales.
Temperature Conversion Guide
Free Online Temperature Converter
Our free online temperature converter helps you convert values between Celsius, Fahrenheit, Kelvin and Rankine. Enter a temperature value, select the original scale and choose the scale you want to convert into.
The calculator is useful for weather comparisons, science, education, engineering, cooking, international travel and everyday temperature calculations.
What Is Temperature Conversion?
Temperature conversion is the process of expressing the same temperature using a different temperature scale. A value measured in Celsius, for example, can be represented as an equivalent value in Fahrenheit or Kelvin.
Unlike many simple unit conversions, temperature scales can include both scale factors and offsets. This is why Celsius-to-Fahrenheit conversion requires multiplication and addition rather than a single multiplication factor.
Celsius Temperature Scale
Celsius is widely used for weather, everyday measurements, education and scientific contexts. The symbol for degrees Celsius is °C.
A commonly used reference is that water freezes near 0 °C and boils near 100 °C under standard atmospheric conditions.
Fahrenheit Temperature Scale
Fahrenheit is commonly used for everyday temperature reporting in the United States. The symbol is °F.
On common reference tables, water freezes near 32 °F and boils near 212 °F under standard atmospheric conditions.
Kelvin Temperature Scale
Kelvin is the SI unit of thermodynamic temperature. Its symbol is K, written without a degree symbol. The Kelvin scale begins at absolute zero.
Celsius and Kelvin have equal-sized increments, while their numerical values differ by 273.15 for corresponding temperature points.
Rankine Temperature Scale
Rankine is an absolute temperature scale whose degree interval matches the Fahrenheit interval. It is sometimes used in engineering and thermodynamic calculations.
How to Convert Celsius to Fahrenheit
Multiply the Celsius temperature by 1.8 and add 32. For example, 20 °C converts to 68 °F.
How to Convert Fahrenheit to Celsius
Subtract 32 from the Fahrenheit temperature and divide by 1.8. For example, 68 °F converts to 20 °C.
How to Convert Celsius to Kelvin
Add 273.15 to the Celsius temperature. For example, 25 °C converts to 298.15 K.
Common Uses of a Temperature Converter
Temperature converters are useful for weather, international travel, cooking, laboratory work, education, engineering, HVAC calculations, manufacturing and scientific research.
Important Temperature Tip
Converting a specific temperature point is different from converting a temperature difference or interval. This calculator is designed for temperature points.
FAQ
Frequently Asked Questions
Multiply the Celsius value by 1.8
and add 32.
Subtract 32 from the Fahrenheit value
and divide by 1.8.
Add 273.15 to the Celsius temperature.
The converter supports Celsius,
Fahrenheit, Kelvin and Rankine.
Yes. The temperature converter is free
to use directly in your browser.