Temperature Converter
Convert temperature between different units including Celsius, Fahrenheit, Kelvin, and Rankine. Get precise conversions instantly.
Common Temperature Conversions
0°C (Freezing point of water)
= 32°F
100°C (Boiling point of water)
= 212°F
20°C (Room temperature)
= 68°F
37°C (Body temperature)
= 98.6°F
-273.15°C (Absolute zero)
= 0K
-40°C
= -40°F
How to Use the Temperature Converter
- Enter the temperature value you want to convert in the "Enter Value" field.
- Select the unit you're converting from in the "From Unit" dropdown.
- Select the unit you want to convert to in the "To Unit" dropdown.
- Click the "Convert" button to see the result.
- Use the "Swap Units" button to quickly reverse the conversion.
- Click on the copy icon next to any result to copy it to your clipboard.
About Temperature Units
Temperature is a physical quantity that expresses hot and cold. It is measured with a thermometer calibrated in one or more temperature scales. Different temperature scales are used around the world for various purposes.
Temperature Scales
- Celsius (°C): The most widely used temperature scale worldwide. In this scale, 0°C is the freezing point of water and 100°C is the boiling point of water at standard atmospheric pressure.
- Fahrenheit (°F): Commonly used in the United States. In this scale, 32°F is the freezing point of water and 212°F is the boiling point of water at standard atmospheric pressure.
- Kelvin (K): The SI base unit of temperature. It uses the same increment as Celsius but starts at absolute zero, which is -273.15°C. There is no degree symbol used with Kelvin.
- Rankine (°R): An absolute temperature scale that uses the Fahrenheit degree. 0°R is absolute zero, and a temperature difference of 1°R equals a temperature difference of 1°F.
Conversion Formulas
- Celsius to Fahrenheit: °F = (°C × 9/5) + 32
- 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 - 32) × 5/9 + 273.15
- Kelvin to Fahrenheit: °F = (K - 273.15) × 9/5 + 32
- Fahrenheit to Rankine: °R = °F + 459.67
- Rankine to Fahrenheit: °F = °R - 459.67
- Kelvin to Rankine: °R = K × 9/5
- Rankine to Kelvin: K = °R × 5/9
Important Temperature Points
- Absolute Zero: -273.15°C, 0K, -459.67°F, 0°R
- Freezing Point of Water: 0°C, 273.15K, 32°F, 491.67°R
- Room Temperature: ~20°C, ~293.15K, ~68°F, ~527.67°R
- Body Temperature: ~37°C, ~310.15K, ~98.6°F, ~558.27°R
- Boiling Point of Water: 100°C, 373.15K, 212°F, 671.67°R
- Equal Point: -40°C = -40°F
The Kelvin scale is used in scientific contexts because it starts at absolute zero, the theoretical temperature at which all thermal motion ceases. It's particularly useful in thermodynamics and other scientific fields.