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Celsius to Fahrenheit Temperature Conversion Formulas

Temperature Equivalent Conversion Form

C
F
K

Conversion table for boiling and freezing of water in different scales

From To Value
0°C Fahrenheit 32°F
0°C Kelvin 273.15 K
100°C Fahrenheit 212°F
100°C Kelvin 373.15 K
32°F Celsius 0°C
32°F Kelvin 273.15 K
212°F Celsius 100°C
212°F Kelvin 373.15 K
273.15 K Celsius 0°C
273.15 K Fahrenheit 32°F
373.15 K Celsius 100°C
373.15 K Fahrenheit 212°F

Temperature conversion table

From To
1 Celsius 33.8 Fahrenheit
1 Celsius 274.15 Kelvin
1 Fahrenheit -17.2222 Celsius
1 Fahrenheit 255.928 Kelvin
1 Kelvin -272.15 Celsius
1 Kelvin -457.87 Fahrenheit

Conversion charts: Formula units of temperature

From To Formula
Celsius Fahrenheit (C * 9/5) + 32
Celsius Kelvin C + 273.15
Fahrenheit Celsius (F - 32) * 5/9
Fahrenheit Kelvin (F + 459.67) * 5/9
Kelvin Celsius K - 273.15
Kelvin Fahrenheit (K * 9/5) - 459.67

* The table shows the basic conversion formulas for different temperature scales. These basic temperature conversion formulas are used worldwide.

The Role of Temperature in Everyday Life

We use temperature every day. It's key in cooking, weather, and health. For example, water freezes at 0 degrees Celsius.

  • Cooking: We bake a cake at a certain temperature.
  • Weather: We dress based on the day's temperature.
  • Health: High body temperature often means a fever.

Different Temperature Scales

There are three main scales to measure temperature. Each one has its start point, called absolute zero.

  • Celsius: Used globally. Zero is the point where water freezes.
  • Fahrenheit: Used in the U.S. Freezing point of water is 32 degrees.
  • Kelvin: Used in science. Starts at absolute zero. That's where all motion stops.
Scale Used in Freezing Point of Water
Celsius Globally 0 degrees
Fahrenheit Mostly U.S. 32 degrees
Kelvin Science 273.15 K

Celsius

Celsius is a metric unit. The metric system is used globally. The Celsius scale is used in daily life and in science too. It starts at the point where water freezes, which is 0 degrees. The boiling point of water is 100 degrees.

  • Freezing point: 0 degrees Celsius
  • Boiling point: 100 degrees Celsius

Fahrenheit

The Fahrenheit scale is mainly used in the U.S. It's part of the imperial system. The freezing point of water in Fahrenheit is 32 degrees, and the boiling point is 212 degrees. Converting Fahrenheit to other scales needs a bit of math, but it's not too hard.

  • Freezing point: 32 degrees Fahrenheit
  • Boiling point: 212 degrees Fahrenheit

Kelvin

Scientists often use the Kelvin scale. Kelvin starts at absolute zero. That's the point where all particle motion stops. It's -273.15 degrees Celsius or -459.67 degrees Fahrenheit. The Kelvin scale does not use the term “degrees.” Instead, it uses “kelvins.”

  • Absolute zero: 0 K
  • Freezing point of water: 273.15 K
  • Boiling point of water: 373.15 K
Absolute Zero Freezing Point of Water Boiling Point of Water
-273.15° C 0° C 100° C
-459.67° F 32° F 212° F
0 K 273.15 K 373.15 K

Celsius to Fahrenheit Conversion

When converting from degrees Celsius to degrees Fahrenheit, the key numbers are 1.8 and 32. How do you do the math if the temperature in Celsius is 20 degrees? In Fahrenheit, it will be equal to (20×1.8) + 32, which is 68 degrees Fahrenheit.
When converting to degrees Celsius, we apply the formula (degrees Celsius * 1.8) + 32

Mathematical Formulas for Conversion of Temperature

Each scale has a formula for converting. Here are the key ones:

  1. Celsius to Fahrenheit formula: (Celsius * 9/5) + 32 = Fahrenheit
  2. Fahrenheit to Celsius: (Fahrenheit - 32) * 5/9 = Celsius
  3. Celsius to Kelvin: Celsius + 273.15 = Kelvin
  4. Kelvin to Celsius: Kelvin - 273.15 = Celsius
  5. Fahrenheit to Kelvin: (Fahrenheit + 459.67) * 5/9 = Kelvin
  6. Kelvin to Fahrenheit: (Kelvin * 9/5) - 459.67 = Fahrenheit

Practical Examples of Temperature Conversion

Let's look at some examples. Say we have a Celsius temperature of 20 degrees.

  • Converting to Fahrenheit: (20 * 9/5) + 32 = 68 degrees Fahrenheit
  • Converting to Kelvin: 20 + 273.15 = 293.15 K

We can do the same for other temperatures. Now you're ready to try converting temperatures yourself!

Converting Celsius to Fahrenheit (and Vice Versa)

Start with a Celsius temperature. Say, 100 degrees, the boiling point of water.

  1. Multiply by 9/5: 100 * 9/5 = 180
  2. Add 32: 180 + 32 = 212

So, 100 degrees Celsius equals 212 degrees Fahrenheit.

For Fahrenheit to Celsius, use the “subtract 32” rule, then multiply by 5/9. Try it at 32 degrees Fahrenheit, the freezing point of water.

Converting Celsius to Kelvin (and Vice Versa)

From Celsius to Kelvin is easy. You just add 273.15.
For Kelvin to Celsius, you simply subtract 273.15.

Converting Fahrenheit to Kelvin (and Vice Versa)

Converting Fahrenheit to Kelvin uses the Fahrenheit scale:

  1. Add 459.67 to Fahrenheit.
  2. Multiply by 5/9.

For Kelvin to Fahrenheit:

  1. Multiply Kelvin by 9/5.
  2. Subtract 459.67.

This table for "Celsius and Fahrenheit" temperatures.

Celsius Fahrenheit
0 32
10 50
20 68
30 86
40 104
50 122

This table is for Kelvin to Celsius.

Kelvin Celsius
0 -273.15
100 -173.15
200 -73.15
300 26.85
400 126.85
500 226.85

Frequently used temperature parameter conversion