Celsius to Fahrenheit Converter (°C to °F)

To convert Celsius to Fahrenheit, use °F = (°C × 9/5) + 32 — for example, 100 °C equals 212 °F and 0 °C equals 32 °F. Unlike a simple multiplication, this scale conversion multiplies by 9/5 and then adds a 32-degree offset.

The formula

Multiply the Celsius value by 9/5 (1.8), then add 32:

°F = (°C × 9/5) + 32

For example, (37 × 9/5) + 32 = 98.6 °F. To reverse it, subtract 32 then multiply by 5/9.

Conversion table

How to convert online

1. Type the Celsius temperature into the first box.
2. Read the Fahrenheit result instantly in the second box.
3. Enter a Fahrenheit value instead to convert back to Celsius — it works both ways.

Use the Celsius to Fahrenheit Converter — free and instant in your browser.

Where this conversion is used

Most of the world uses Celsius while the United States uses Fahrenheit, so converting between them matters for weather, cooking, travel and science. It is the quick check behind reading a foreign forecast, following a recipe from another country, or interpreting a body-temperature reading on the opposite scale.

Scaling and accuracy

Because the formula adds a 32-degree offset, you cannot simply multiply — every conversion needs both the ×9/5 step and the +32 step. A useful mental shortcut for rough estimates is to double the Celsius value and add 30: 20 °C gives about 70 °F (exact is 68 °F), close enough for a quick weather check. For precise results, always use the full formula. Note that a change of 1 °C equals a change of 1.8 °F, so temperature differences scale by 1.8 even though absolute readings need the offset. This converter applies the exact formula every time.

FAQ

What is 100 °C in Fahrenheit?

100 °C equals 212 °F — the boiling point of water at sea level. Apply (100 × 9/5) + 32 = 212.

What is 0 °C in Fahrenheit?

Zero °C equals 32 °F, the freezing point of water. The 32-degree offset is why the scales do not share a zero.

Is there a temperature where °C and °F are equal?

Yes — at -40, both scales read the same: -40 °C = -40 °F.

How do I convert Fahrenheit back to Celsius?

Use °C = (°F − 32) × 5/9, or use our Fahrenheit to Celsius converter. For instance, 98.6 °F = 37 °C.

Related converters

• Fahrenheit to Celsius Converter
• Celsius to Kelvin Converter

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