Celsius to Fahrenheit

What is Celsius?

Celsius, also known as centigrade, is a temperature scale used in most of the world. It sets the freezing point of water at 0°C and the boiling point at 100°C under standard atmospheric pressure. The scale was developed by Swedish astronomer Anders Celsius in 1742 and is the official temperature unit in the International System of Units (SI), used by all countries except the United States, Liberia, and the Bahamas.

The Celsius scale is intuitive for everyday use because its 0-to-100 range maps directly to the freezing and boiling points of water — the two temperature references people encounter most often. Scientific work often uses Kelvin, which has the same incremental scale as Celsius but starts at absolute zero (-273.15°C).

What is Fahrenheit?

Fahrenheit is a temperature scale primarily used in the United States and a few other countries. It sets the freezing point of water at 32°F and the boiling point at 212°F, giving a 180-degree interval between the two. The scale was proposed by German physicist Daniel Gabriel Fahrenheit in 1724 and was widely used in English-speaking countries until the mid-20th century, when most adopted Celsius.

In the Fahrenheit scale, typical room temperature is about 68-72°F, body temperature is approximately 98.6°F, and a hot summer day might reach 95-100°F. The finer degree increments compared to Celsius make Fahrenheit useful for weather reporting and HVAC applications where small temperature differences matter.

When to convert Celsius to Fahrenheit

Common scenarios that require Celsius-to-Fahrenheit conversion include:

• Weather and travel. If you are from a Celsius country visiting the US, or vice versa, you need to convert temperatures to understand forecasts and thermostats.
• Cooking and baking. Many oven temperatures in US recipes are in Fahrenheit, while European recipes use Celsius.
• Science and engineering. Some legacy equipment and standards use Fahrenheit, requiring conversion to or from Celsius.
• Medical and health. Body temperature norms differ between Celsius and Fahrenheit depending on the country.

How to convert Celsius to Fahrenheit

This tool converts instantly in your browser.

1. Enter a value. Type a Celsius temperature in the input box.
2. See the result. The Fahrenheit equivalent appears immediately.
3. Copy if needed. Click "Copy result" to copy the value.

The formula is °F = °C × 9/5 + 32. For example, 25°C = 25 × 9/5 + 32 = 77°F. All math is local and private.

Common Celsius to Fahrenheit values

Here are some frequently encountered temperature conversions:

Celsius	Fahrenheit	Description
0°C	32°F	Freezing point of water
10°C	50°F	Cool day
20°C	68°F	Room temperature
25°C	77°F	Warm room
37°C	98.6°F	Body temperature
100°C	212°F	Boiling point of water