Converting temperatures between Fahrenheit and Celsius is a common need. Let’s break down how to convert 21°F to C. We’ll cover the formula and an example so you can understand the steps.
Understanding Fahrenheit and Celsius
You might know that 21°F is pretty cold, but how cold is it in Celsius?
First, let’s take a look at each of these temperature scales.
Fahrenheit (°F)
Fahrenheit is a temperature scale where water freezes at 32°F and boils at 212°F. This scale is used mainly in the United States.
Celsius (°C)
Celsius is the temperature scale where water freezes at 0°C and boils at 100°C. Most of the world uses Celsius to measure the temperature.
How to convert 21°F to Celsius
The formula for converting Fahrenheit to Celsius is:
°C = (°F – 32) ÷ (9/5) or °C = (°F – 32) ÷ 1.8
Here’s how it works:
- Subtract 32 from the Fahrenheit temperature.
- Divide the result by 1.8.
So, to convert 21°F to Celsius:
°C = (21 – 32) ÷ 1.8
°C = -11 ÷ 1.8
°C ≈ -6.11
Summary
So, when you convert 21 degrees Fahrenheit to Celsius, you get approximately -6.11 degrees Celsius.
To convert any temperature from Fahrenheit to Celsius in the future, just remember the formula: °C = (°F – 32) ÷ 1.8.
Knowing how to convert between temperature scales is important for many things, from science and engineering to knowing what to wear outside. And if you don’t want to do the math yourself, there are plenty of online calculators that can do the conversion for you.