Celsius to Fahrenheit (°C to °F) for weather, fever and ovens

Convert °C to °F with the exact formula (× 9/5 + 32), plus a table of weather, body and oven temperatures.

Fromdegree Celsius (°C)

Todegree Fahrenheit (°F)

33.8

Decimals1 decimal

Formula: °F = °C × 9/5 + 32

1 °C = 33.8 °F

Common values: degree Celsius to degree Fahrenheit

°C	°F
-40 °C	-40 °F
-30 °C	-22 °F
-20 °C	-4 °F
-10 °C	14 °F
-5 °C	23 °F
0 °C	32 °F
5 °C	41 °F
10 °C	50 °F
15 °C	59 °F
20 °C	68 °F
25 °C	77 °F
30 °C	86 °F
35 °C	95 °F
37 °C	98.6 °F
40 °C	104 °F
45 °C	113 °F
50 °C	122 °F
100 °C	212 °F
180 °C	356 °F
200 °C	392 °F
220 °C	428 °F

How it works

The formula is °F = °C × 9/5 + 32: multiply by 1.8, then add 32. It needs the offset because water freezes at 0 °C but 32 °F. So 25 °C is 77 °F, 37 °C (body temperature) is 98.6 °F and a 45 °C summer afternoon in the Gulf is 113 °F.

Ovens are where people most often get stuck: 180 °C is 356 °F (recipes round to 350 °F), 200 °C is 392 °F (400 °F) and 220 °C is 428 °F (425 °F). The table includes these. For a change in temperature rather than a reading, multiply by 1.8 without adding 32.

How to convert Celsius to Fahrenheit

Formula: °F = °C × 9/5 + 32.

Multiply the Celsius value by 9/5 (1.8), then add 32. Worked example for a 45 °C summer day: 45 × 1.8 = 81, and 81 + 32 = 113 °F.

Multiply first, then add: adding 32 before scaling is the most common mistake. A temperature difference (a 5 °C rise, a thermostat step) converts without the offset: 5 °C of warming is 9 °F of warming.

Fahrenheit to Celsius: the reverse direction, °C = (°F − 32) × 5/9

°C to °F chart

Each row is computed with the same exact factor as the converter above and rounded only for display.

Celsius	Fahrenheit	Kelvin
-40 °C	-40 °F	233.15 K
-20 °C	-4 °F	253.15 K
-10 °C	14 °F	263.15 K
0 °C	32 °F	273.15 K
4 °C	39.2 °F	277.15 K
10 °C	50 °F	283.15 K
15 °C	59 °F	288.15 K
18 °C	64.4 °F	291.15 K
20 °C	68 °F	293.15 K
21 °C	69.8 °F	294.15 K
22 °C	71.6 °F	295.15 K
24 °C	75.2 °F	297.15 K
25 °C	77 °F	298.15 K
30 °C	86 °F	303.15 K
35 °C	95 °F	308.15 K
36.6 °C	97.9 °F	309.75 K
37 °C	98.6 °F	310.15 K
37.5 °C	99.5 °F	310.65 K
38 °C	100.4 °F	311.15 K
39 °C	102.2 °F	312.15 K
40 °C	104 °F	313.15 K
45 °C	113 °F	318.15 K
50 °C	122 °F	323.15 K
100 °C	212 °F	373.15 K
160 °C	320 °F	433.15 K
180 °C	356 °F	453.15 K
200 °C	392 °F	473.15 K
220 °C	428 °F	493.15 K
250 °C	482 °F	523.15 K

Everyday Celsius-to-Fahrenheit examples

A home fridge set to 4 °C: 4 °C = 39.2 °F.
A comfortable indoor thermostat setting: 21 °C = 69.8 °F.
The fever threshold many health services use: 38 °C = 100.4 °F.
A moderate oven for cakes: 180 °C = 356 °F.
Water boiling at sea level: 100 °C = 212 °F.

How to use it

Type the value in the first box; the converted value appears in the second box as you type.
Or type in the second box to convert the other way.
Use the Decimals menu to round, and the quick-reference table for common values.

Frequently asked questions

What is the formula for Celsius to Fahrenheit?

°F = °C × 9/5 + 32. Example: 30 °C × 1.8 = 54, plus 32 = 86 °F.

What is a quick mental estimate?

Double it and add 30: 20 °C → 70 °F (exact 68). The error grows at high temperatures, so use the exact formula for cooking.

What is 180 °C in Fahrenheit?

356 °F. Recipes usually round it to 350 °F, which is 176.7 °C.

Is 38 °C a fever?

It is 100.4 °F, the threshold many health services use to define a fever. This page only converts the number; ask a clinician about symptoms.