Degrees Fahrenheit to Kelvin Calculator

How to Convert Fahrenheit to Kelvin

Converting temperatures from Fahrenheit (°F) to Kelvin (K) involves a two-step process. First, convert Fahrenheit to Celsius, then convert Celsius to Kelvin. This method ensures accuracy and follows the standard temperature conversion protocols.

Step 1: Convert Fahrenheit to Celsius

The formula to convert Fahrenheit to Celsius is:

This formula subtracts 32 from the Fahrenheit temperature and then multiplies the result by 5/9 to get the equivalent temperature in Celsius.

Step 2: Convert Celsius to Kelvin

Once you have the temperature in Celsius, you can convert it to Kelvin using this simple formula:

This formula adds 273.15 to the Celsius temperature to get the equivalent temperature in Kelvin. The Kelvin scale starts at absolute zero, which is why this addition is necessary.

Combined Formula

For a direct conversion from Fahrenheit to Kelvin, you can combine these two formulas:

This combined formula first converts Fahrenheit to Celsius and then directly to Kelvin in one step.

Conversion Formula

The complete formula for converting Fahrenheit to Kelvin is:

Where:

• K is the temperature in Kelvin
• °F is the temperature in Fahrenheit

This formula accounts for the differences between the Fahrenheit, Celsius, and Kelvin scales, providing an accurate conversion.

Conversion Examples

Let's look at some practical examples to understand how the conversion works.

Example 1: Room Temperature

If the room temperature is 70°F, what is it in Kelvin?

So, 70°F is approximately 284.88 K.

Example 2: Boiling Point of Water

What is the boiling point of water in Kelvin if it's 212°F?

This confirms that the boiling point of water is 373.15 K.

Example 3: Freezing Point of Water

What is the freezing point of water in Kelvin if it's 32°F?

This shows that the freezing point of water is 273.15 K.

Understanding Temperature Scales

Temperature scales are used to measure heat and cold. The three most common scales are Fahrenheit, Celsius, and Kelvin.

Fahrenheit Scale (°F)

The Fahrenheit scale is commonly used in the United States. It was developed by Daniel Gabriel Fahrenheit in the early 18th century. The freezing point of water is 32°F, and the boiling point is 212°F.

Celsius Scale (°C)

The Celsius scale is used in most countries around the world. It was developed by Anders Celsius in the mid-18th century. The freezing point of water is 0°C, and the boiling point is 100°C.

Kelvin Scale (K)

The Kelvin scale is used in scientific contexts, particularly in physics and chemistry. It was developed by William Thomson, Lord Kelvin, in the mid-19th century. The Kelvin scale starts at absolute zero, which is -273.15°C or -459.67°F.

Relationship Between the Scales

The Fahrenheit, Celsius, and Kelvin scales are related through mathematical formulas. The conversion between these scales allows for easy comparison of temperatures across different systems.