How to Convert Celsius, Fahrenheit, and Kelvin (Temperature Formula Conversions)

TL;DR

To convert temperatures, use F = 1.8C + 32 for Fahrenheit and Celsius, and K = C + 273 for Kelvin. Fahrenheit-to-Kelvin and Kelvin-to-Fahrenheit both go through Celsius first, while the other conversions are single steps. Worked examples show water boiling at 100C/212F, -40F equaling -40C, and absolute zero at 0 Kelvin (-273.15C or -459.67F). Read on for the exact formulas and step-by-step math.

Transcript

in this video i'm going to show you how to convert between units of temperature fahrenheit celsius to kelvin so let's say if you want to convert fahrenheit to celsius it's simply a one step process but if you want to go from fahrenheit to kelvin you need to convert it to celsius first and then to kelvin likewise going from kelvin to celsius is simp... Read More

Key Insights

• 🆓 Fahrenheit to Celsius conversion: F = 1.8C + 32.
• ❓ Celsius to Kelvin conversion: Kelvin = Celsius + 273.
• 🪜 Fahrenheit to Kelvin conversion: Convert Fahrenheit to Celsius first, then add 273.
• 😒 Kelvin to Fahrenheit conversion: Convert Kelvin to Celsius first, then use the Celsius to Fahrenheit equation.
• 🥶 Absolute zero is the coldest possible temperature at 0 Kelvin, which is equal to -273.15 degrees Celsius or -459.67 degrees Fahrenheit.
• 💦 Water boils at 100 degrees Celsius or 212 degrees Fahrenheit.
• ❎ Negative 40 degrees Fahrenheit is equal to negative 40 degrees Celsius.

Questions & Answers

Q: What is the Celsius, Fahrenheit, and Kelvin conversion formula?

The core equation linking Fahrenheit and Celsius is F = 1.8C + 32. To reach Kelvin, use Kelvin = Celsius + 273 (or 273.15 for exact figures). There is no direct Fahrenheit-to-Kelvin formula, so you convert through Celsius first.

Q: How do you convert Fahrenheit to Celsius?

Start from F = 1.8C + 32 and solve for C. Subtract 32 from the Fahrenheit temperature, then divide the result by 1.8. For example, 212F minus 32 is 180, and 180 divided by 1.8 equals 100C, the boiling point of water.

Q: How do you convert Fahrenheit to Kelvin?

It is a two-step process because there is no single formula. First convert Fahrenheit to Celsius using F = 1.8C + 32, then add 273 to the Celsius temperature to get Kelvin. You always go in that order: Fahrenheit to Celsius to Kelvin.

Q: How do you convert Celsius to Kelvin?

Simply add 273 to the Celsius temperature, since Kelvin = Celsius + 273. For exact figures you can add 273.15. For instance, 100C plus 273 equals 373 Kelvin.

Q: What is -40 degrees Fahrenheit in Celsius and Kelvin?

Using F = 1.8C + 32, subtract 32 from -40 to get -72, then divide by 1.8 to get -40C. So -40F equals -40C, the one temperature where both scales match. Adding 273 gives 233 Kelvin.

Q: How do you convert Kelvin to Celsius and Fahrenheit?

To get Celsius, subtract 273 from the Kelvin temperature. Then convert that Celsius value to Fahrenheit with F = 1.8C + 32. For example, 298 Kelvin minus 273 is 25C, and 1.8 times 25 plus 32 is 77F.

Q: What is absolute zero in Celsius and Fahrenheit?

Absolute zero is 0 Kelvin, the coldest temperature theoretically possible. Subtracting 273.15 gives -273.15C, and applying F = 1.8C + 32 to that value gives -459.67F.

Q: Why does water boil at 212 degrees Fahrenheit?

Water boils at 100C, and converting with F = 1.8C + 32 gives 1.8 times 100 plus 32, which equals 212F. This is why 100C and 212F both mark the boiling point of water.

Summary & Key Takeaways

• Converting Fahrenheit to Celsius is a one-step process, but converting to Kelvin requires converting to Celsius first.

• Converting Kelvin to Celsius is straightforward, but converting to Fahrenheit requires converting to Celsius first.

• To convert a temperature, use the appropriate equation and solve for the desired unit.