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Wondering how to convert a temperature from Celsius (°C) to Fahrenheit (°F)? It's easy to do with a simple formula. While the numbers might seem tricky at first, the calculation is very straightforward.
The most common formula to convert Celsius to Fahrenheit is:
Here's how to use that formula in three easy steps:
And you're done! So, 20°C is equal to 68°F.
You can use this simple method whenever you need to convert a temperature from Celsius to Fahrenheit.
Here are some quick reference conversions from degree Celsius (C) to degree Fahrenheit (F):
| degrees Celsius | degrees Fahrenheit |
|---|---|
| 0.000001 C | F |
| 0.001 C | F |
| 0.1 C | F |
| 1 C | F |
| 2 C | F |
| 3 C | F |
| 4 C | F |
| 5 C | F |
| 6 C | F |
| 7 C | F |
| 8 C | F |
| 9 C | F |
| 10 C | F |
| 20 C | F |
| 30 C | F |
| 40 C | F |
| 50 C | F |
| 100 C | F |
| 1000 C | F |
| 10000 C | F |
For all Temperature converters, choose units using the From/To dropdowns above.
A degree Celsius (°C) is one of the most common units for measuring temperature around the world. As a key part of the metric system, it's used in everything from daily weather forecasts to scientific research. It offers a straightforward and rational method for gauging the temperature of an object. The plural version is degrees Celsius.
The Celsius scale is cleverly based on the physical properties of water. This relationship to a familiar substance makes it very easy to understand. Let's break it down simply:
This perfect 100-degree interval between freezing and boiling is why it was initially called a "centigrade" scale (from "centi-" meaning 100). This straightforward system is the reason Celsius is the standard for temperature measurement in most countries.
In 1742, the Swedish astronomer Anders Celsius introduced his temperature scale, but with a surprising twist—it was upside down! He originally set 100° as the freezing point of water and 0° as its boiling point.
It was only after his death that the scale was flipped to the familiar version we use today, making it far more logical. This change is often credited to fellow scientist Carl Linnaeus.
Because Celsius is a global standard, knowing how to convert it to other scales, such as Fahrenheit (°F) and Kelvin (K), is useful. Here are the simple formulas to do it:
A degree Fahrenheit (°F) is the unit of temperature used in the imperial system of measurement.
The Fahrenheit scale was created in 1724 by the German physicist Daniel Gabriel Fahrenheit. He based his scale on three fixed points:
While most of the world has adopted the Celsius scale for everyday temperature measurement, the Fahrenheit scale remains the official scale in the United States, its territories (like Puerto Rico and Guam), and a few other countries, including the Bahamas, Palau, and the Cayman Islands.
In the United Kingdom, both Fahrenheit and Celsius are used to describe temperature; Fahrenheit remains more familiar to older people and is often heard in casual conversation.
You can easily convert any temperature from Fahrenheit to Celsius using a simple formula. To convert a temperature from Fahrenheit (F) to Celsius (C), subtract 32 from the Fahrenheit temperature and then multiply the result by 5/9.
The Fahrenheit to Celsius formula is: C = (F − 32) × 5/9
For example, to convert a pleasant day of 77 °F to Celsius: C = (77 − 32) × 5/9 = 45 × 5/9 = 25 °C