Celsius to Fahrenheit Converter

Convert Celsius (°C) to Fahrenheit (°F) instantly, with the exact formula, a full equivalents readout and a conversion chart. Ideal for US weather, travel, recipes and lab work.

Result

98.6 °F

°C to °F conversion line

The straight line maps any Celsius reading to Fahrenheit. The red dot is your value; the smaller dots mark freezing, room, body and boiling temperatures.

How to convert Celsius to Fahrenheit

Because 100 Celsius degrees cover the same span as 180 Fahrenheit degrees, you first stretch the Celsius value by 9/5, then add Fahrenheit's 32-degree offset so both scales agree at the freezing point of water.

°F = (°C × 9/5) + 32
°F = (°C × 1.8) + 32

Worked example

A European recipe calls for a 200°C oven. Multiply by 1.8 to get 360, then add 32: 360 + 32 = 392°F, so set a US oven to about 390–400°F.

Quick mental estimate

Double the Celsius value and add 30: (°C × 2) + 30. A 25°C afternoon is about (25 × 2) + 30 = 80°F, close to the exact 77°F.

Celsius to Fahrenheit reference table

Celsius	Fahrenheit	Where you see it
−18°C	−0.4°F	Home freezer
0°C	32°F	Water freezes
20°C	68°F	Room temperature
37°C	98.6°F	Body temperature
40°C	104°F	High fever / heat wave
100°C	212°F	Water boils
180°C	356°F	Baking oven

Frequently asked questions

How do I convert Celsius to Fahrenheit?

Multiply by 9/5 (1.8), then add 32. For example, 20°C: 20 × 1.8 + 32 = 68°F.

What is 37°C in Fahrenheit?

37°C equals 98.6°F, the classic normal body temperature.

Is there a quick way to estimate °C to °F?

Double the Celsius value and add 30. For 20°C, 20 × 2 + 30 = 70°F, close to the exact 68°F.

What is 180°C in Fahrenheit for baking?

180°C equals 356°F, usually rounded to a 350°F oven setting.

What is 40°C in Fahrenheit?

40°C equals 104°F, which signals a high fever or a very hot day.

At what temperature do the two scales read the same?

At −40°: −40°C equals −40°F. It is the single crossover point of the two scales.