Introduction

Temperature is an important aspect of our daily lives. It affects our comfort, health, and even the environment around us. However, different countries use different temperature scales, which can be confusing when trying to understand the temperature in a foreign country. In this article, we will focus on converting Celsius to Fahrenheit and vice versa, with a specific focus on the question: 21 C is what in Fahrenheit?

Understanding Temperature Scales

Before we dive into temperature conversion, it’s important to understand the two most commonly used temperature scales: Celsius and Fahrenheit.

• Celsius: This is the most widely used temperature scale in the world. It is based on the freezing and boiling points of water, with 0 degrees Celsius (°C) being the freezing point and 100 degrees Celsius being the boiling point.
• Fahrenheit: This temperature scale is commonly used in the United States and a few other countries. It is also based on the freezing and boiling points of water, but with 32 degrees Fahrenheit (°F) being the freezing point and 212 degrees Fahrenheit being the boiling point.

Converting Celsius to Fahrenheit

Now that we understand the two temperature scales, let’s focus on converting Celsius to Fahrenheit. The formula for this conversion is:

F = (C x 1.8) + 32

Where F is the temperature in Fahrenheit and C is the temperature in Celsius.

Using this formula, we can easily convert 21 degrees Celsius to Fahrenheit:

F = (21 x 1.8) + 32 = 69.8°F

Therefore, 21 C is equal to 69.8°F.

Converting Fahrenheit to Celsius

Converting Fahrenheit to Celsius is just as easy. The formula for this conversion is:

C = (F – 32) / 1.8

Where C is the temperature in Celsius and F is the temperature in Fahrenheit.

Using this formula, we can convert 69.8 degrees Fahrenheit to Celsius:

C = (69.8 – 32) / 1.8 = 21°C

Therefore, 69.8°F is equal to 21°C.

Conclusion

Temperature conversion is a useful skill to have, especially if you travel frequently or work in a field that requires temperature measurements. By understanding the formulas for converting Celsius to Fahrenheit and vice versa, you can easily determine the temperature in either scale. So, the next time someone asks you “21 C is what in Fahrenheit?”, you’ll know exactly how to answer.