My recipe says 375°F but my oven is Celsius. What do I set it to?

375°F ≈ 190°C. For baking, within 5-10 degrees is fine. Most European recipes are 180-200°C; most US recipes are 350-400°F. For the reverse, see [Fahrenheit to Celsius]({/temperature/fahrenheit-to-celsius/}).

Is 100°F hot or just warm?

100°F (37.8°C) is around body temperature—neither hot nor cold to wear. 85°F (29°C) feels warm. 95°F+ (35°C+) is uncomfortably hot for most people.

I checked my temperature and it's 39°C. Is that normal?

39°C = 102.2°F. For reference, a fever in adults is generally defined as 38°C (100.4°F) or higher. Any health concerns should be discussed with a healthcare professional. To convert a Fahrenheit reading, use [Fahrenheit to Celsius]({/temperature/fahrenheit-to-celsius/}).

Why does the US use Fahrenheit if everyone else uses Celsius?

Historical quirk. The US adopted Fahrenheit in the 1800s and never switched. It's primarily used in the US, Bahamas, Belize, Cayman Islands, Palau, and Micronesia.

How do I convert in my head?

Quick estimate: double the Celsius and add 30. Example: 20°C × 2 + 30 = 70°F (actual: 68°F). For accuracy, multiply by 1.8 and add 32.

Celsius (C) to Fahrenheit (F) Converter

Enter a value to instantly convert between temperature units.

From

Precision4 dp

1 Celsius = 33.8 Fahrenheit

Key Formulas

Celsius → Fahrenheit

°F = f(°C)

Fahrenheit → Celsius

°C = f(°F)

Celsius → Kelvin

K = f(°C)

Kelvin → Celsius

°C = f(K)

Formula

°F = (°C × 1.8) + 32

Celsius is used worldwide for weather, cooking, and science. Fahrenheit dominates in the US, Bahamas, Belize, Cayman Islands, and Palau. The scale difference trips people up: 0°C is freezing, but that's 32°F—not obvious without conversion.

Source: NIST SP 811, 2008 Edition

Frequently Asked Questions

Real-World Examples

Preheat oven for cookies. European recipes often specify 180°C; US ovens show Fahrenheit.

180 °C = 356 °F

Body temperature check. For reference, 38°C (100.4°F) is the fever threshold in adults.

38.5 °C = 101.3 °F

Pleasant spring day in Europe. Americans would call this comfortable room temperature.

25 °C = 77 °F

Winter morning. Below freezing in Celsius, but still above 0°F (life-threatening cold).

-5 °C = 23 °F

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Celsius (C) to Fahrenheit (F) Converter

Key Formulas

Formula

Frequently Asked Questions

Real-World Examples

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