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Celsius to Fahrenheit Converter

C
Temperature in Fahrenheit
32°F
Freezing point of water

Formula

°F = (°C × 9/5) + 32

To convert Celsius to Fahrenheit, multiply the Celsius temperature by 9/5 (or 1.8), then add 32. This formula accounts for the different starting points and scale sizes of the two temperature systems. The Celsius scale sets water's freezing point at 0° and boiling point at 100°, while Fahrenheit uses 32° and 212° respectively.

How to use

  1. Enter the Temperature in Celsius.
  2. The Fahrenheit value updates instantly.
  3. Read the converted temperature in Fahrenheit.

Example

0°C converts to 32°F (0 × 9/5 + 32), the freezing point of water.

Frequently Asked Questions

What is 0°C in Fahrenheit?
0°C equals 32°F. This is the freezing point of water.
What is 100°C in Fahrenheit?
100°C equals 212°F. This is the boiling point of water at standard atmospheric pressure.
At what temperature are Celsius and Fahrenheit equal?
-40 degrees is the same in both scales. -40°C = -40°F.
Why does the US use Fahrenheit?
The Fahrenheit scale was developed by Daniel Gabriel Fahrenheit in 1724 and was widely adopted in English-speaking countries. While most countries switched to Celsius as part of metrication, the US retained Fahrenheit for everyday use.
What is normal body temperature in both scales?
Normal human body temperature is approximately 37°C or 98.6°F, though it can vary slightly between individuals.
What is a quick way to estimate Celsius to Fahrenheit in my head?
A handy shortcut is to double the Celsius value and add 30, which gets you close without the exact 9/5 math. For example, 20°C doubled is 40, plus 30 gives about 70°F, while the precise answer is 68°F. The estimate drifts a few degrees off at higher temperatures, so use the full formula when accuracy matters, like for cooking or fevers.
What are common oven temperatures in Celsius and Fahrenheit?
A moderate baking oven is around 180°C, which equals 356°F, often rounded to 350°F in US recipes. A hot oven for roasting or pizza is about 220°C or 425°F, and a low oven for slow cooking sits near 150°C or 300°F. Knowing these pairs helps when following recipes written for the other temperature scale.

Converting Celsius to Fahrenheit

The formula is F = C × 9/5 + 32. Multiply by 9/5 (1.8) because a Celsius degree spans more than a Fahrenheit degree, then add 32 to account for the different starting points of the two scales. So 20 °C becomes 20 × 1.8 + 32 = 68 °F.

The quick estimate is to double and add 30: 25 °C → 50 + 30 = 80 °F, close to the exact 77 °F. The estimate drifts at the extremes, so use the real formula for cooking and fevers.

Temperatures worth knowing

Key anchors: 0 °C = 32 °F (freezing), 20–22 °C = 68–72 °F (room temperature), 37 °C = 98.6 °F (body temperature), and 100 °C = 212 °F (boiling). Metric recipes often call for a 180 °C oven, which is about 356 °F (160 °C in a fan oven), while 220 °C for roasting is about 428 °F.

Common conversions

0°C20°C30°C37°C40°C100°C150°C160°C180°C190°C200°C220°C250°C300°C

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