Celsius to Fahrenheit Converter

Runs in your browserConverters#Essential

Convert °C to °F (°F = °C × 9/5 + 32), for weather, body temperature and cooking.

Celsius to Fahrenheit Converter

1 °C = 33.8 °F

1 °C in every temperature unit
UnitValue
Celsius °C1
Fahrenheit °F33.8
Kelvin K274.15
How to use, limits & privacy

About Celsius to Fahrenheit Converter

Convert Celsius to Fahrenheit with the exact formula °F = °C × 9/5 + 32. Some values to know: 0 °C = 32 °F (water freezes), 25 °C = 77 °F, 37 °C = 98.6 °F (normal body temperature), 40 °C = 104 °F, 45 °C = 113 °F and 100 °C = 212 °F (water boils at sea level). The page opens with Celsius in From and Fahrenheit in To, and the table also shows kelvin.

How to Use

1

Type the °C value

Enter the temperature in the From box. Negative values work, such as -5 for a cold night; type the minus sign before the number.

2

Read °F

The To box and the line below show the result, for example "38 °C = 100.4 °F".

3

Check kelvin

The table lists the same temperature in kelvin as well, useful for science homework.

4

Go back to Celsius

Type a Fahrenheit value in the To box, or press Swap units, to convert °F to °C.

Privacy & Processing

  • Mode: local
  • Files Leave Browser: Local tool processing; review details below
  • Max Input Size: Device memory limits
  • Account Required: No
  • Data Stored Locally: Nothing you type is saved. If you switch to another category, that choice is remembered in this browser.
  • Network Processing: Assets or models may require an initial download

Everything is calculated in your browser. Nothing you type is sent anywhere.

Rules & Limitations

  • Temperature uses an offset, so you cannot just multiply: doubling °C does not double °F.
  • Values below absolute zero (-273.15 °C) do not exist, and the tool warns if you type one.
  • Results are exact; values that do not end, such as fractions of a degree, are shown to at most 10 significant digits.

Top Suggestions

  • Telling relatives abroad how hot an Indian summer day is in °F
  • Converting an oven temperature from a recipe in °C to °F for an American oven
  • Reading a body temperature in °F from a Celsius thermometer
  • Science and physics homework that mixes °C, °F and K

Celsius to Fahrenheit Converter FAQ

What is 37 °C in Fahrenheit?

37 °C is 98.6 °F: 37 × 9/5 = 66.6, plus 32 is 98.6. This is the figure usually quoted as normal body temperature.

Is 38 °C a fever in Fahrenheit?

38 °C is 100.4 °F, the reading most often used as the threshold for a fever. 39 °C is 102.2 °F and 40 °C is 104 °F. Ask a doctor about any fever that worries you.

What is 180 °C in Fahrenheit for baking?

180 °C is 356 °F. Recipes usually round it to 350 °F. Likewise 200 °C is 392 °F (often given as 400 °F) and 220 °C is 428 °F.

How can I convert Celsius to Fahrenheit in my head?

Double the Celsius figure and add 30. For 30 °C that gives 90 °F, close to the exact 86 °F. The estimate drifts further off at high temperatures, so use the exact formula for cooking.

At what temperature are Celsius and Fahrenheit the same?

At -40. Type -40 in either box and the other side also shows -40, the one point where both scales meet.