Temperature Converter

Convert between Celsius, Fahrenheit and Kelvin instantly, with the formulas shown and a quick reference of everyday temperatures.

Value

From

Temperature in fahrenheit

33.8 °F

1 °C = 33.8 °F

1 °C in every unit

Celsius1 °C
Fahrenheit33.8 °F
Kelvin274.15 K

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How to use it

Enter a temperature and choose its scale.
Pick the scale to convert to, or read all three at once.
Negative values are fine — just type a minus sign.

Examples

Oven temperature

180 °C is 356 °F, which recipes usually round to 350 °F.

Fever check

38 °C is 100.4 °F, a common threshold for a fever.

Conversion tables

Celsius to fahrenheit
Celsius	Fahrenheit
-40 °C	-40 °F
-10 °C	14 °F
0 °C	32 °F
10 °C	50 °F
20 °C	68 °F
25 °C	77 °F
30 °C	86 °F
37 °C	98.6 °F
100 °C	212 °F
180 °C	356 °F
200 °C	392 °F
220 °C	428 °F

Fahrenheit to celsius
Fahrenheit	Celsius
0 °F	-17.778 °C
32 °F	0 °C
50 °F	10 °C
68 °F	20 °C
72 °F	22.222 °C
98.6 °F	37 °C
212 °F	100 °C
350 °F	176.67 °C
400 °F	204.44 °C
450 °F	232.22 °C

The conversion formulas

Fahrenheit and Celsius differ in both scale and starting point: water freezes at 0 °C (32 °F) and boils at 100 °C (212 °F). So you multiply by 9/5 and add 32 to go from Celsius to Fahrenheit.

Kelvin uses the same step size as Celsius but starts at absolute zero, so 0 K is −273.15 °C. There are no negative Kelvin temperatures.

°F = °C × 9/5 + 32 · °C = (°F − 32) × 5/9 · K = °C + 273.15

Frequently asked questions

What's a quick way to convert Celsius to Fahrenheit in my head?

Double the Celsius figure and add 30. It's close for everyday temperatures: 20 °C gives 70 °F (exact: 68 °F).

At what temperature are Celsius and Fahrenheit equal?

At −40. −40 °C is exactly −40 °F.

Why isn't it “degrees Kelvin”?

Kelvin is an absolute scale, so values are written simply as kelvins (K) without the degree sign.

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More in Converters · Last reviewed September 2026