Celsius to Fahrenheit
Type degrees Celsius (°C), see degrees Fahrenheit (°F).
By Akash Yadav Updated 12 October 2026
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The formula
How to convert Celsius to Fahrenheit
To change degrees Celsius into degrees Fahrenheit: multiply by 1.8, then add 32.
degrees Fahrenheit = degrees Celsius × 1.8 + 32
Going the other way: degrees Celsius = (degrees Fahrenheit − 32) ÷ 1.8
A reading of 1 degree Celsius is 33.8 degrees Fahrenheit, but a step of 1 degree Celsius is 1.8 degrees Fahrenheit — the two scales start counting from different places, which is why the formula shifts as well as scales. Both numbers in it are exact definitions, not rounded estimates.
Worked example
You have 20 degrees Celsius. Multiply by 1.8, then add 32. 20 × 1.8 + 32 = 68 °F.
Common values
Celsius to Fahrenheit conversion table
| Degrees Celsius (°C) | Degrees Fahrenheit (°F) |
|---|---|
| -40 °C | -40 °F |
| -20 °C | -4 °F |
| -10 °C | 14 °F |
| 0 °C | 32 °F |
| 10 °C | 50 °F |
| 15 °C | 59 °F |
| 20 °C | 68 °F |
| 22 °C | 71.6 °F |
| 25 °C | 77 °F |
| 30 °C | 86 °F |
| 37 °C | 98.6 °F |
| 40 °C | 104 °F |
| 100 °C | 212 °F |
| 180 °C | 356 °F |
| 200 °C | 392 °F |
Before you rely on it
Why this formula has a “+ 32” in it
Every other converter on this site multiplies by one number and stops. Temperature cannot, because the two scales do not agree about where zero is. Water freezes at 0 °C and at 32 °F — the same temperature, two different numbers — so before the scaling means anything, the 32 has to be accounted for.
The two scales also count in different sized degrees. There are 100 Celsius degrees between freezing and boiling and 180 Fahrenheit degrees across the same range, and 180 ÷ 100 is the 1.8 in the formula.
This matters when you convert a difference rather than a reading. If a room warms by 10 °C it has warmed by 18 °F, not by 50 °F. Add the 32 only when you are converting an actual temperature; leave it out when you are converting a change in temperature.
There is exactly one temperature where the two scales agree: −40 °C is −40 °F. It is in the table below, and it is a quick way to check any converter, including this one.
Common questions
Frequently asked questions
What is −5 °C in Fahrenheit?
−5 °C is 23 °F — a hard frost.
What is −10 °C in Fahrenheit?
−10 °C is 14 °F — a cold winter day in a temperate climate.
What is −20 °C in Fahrenheit?
−20 °C is -4 °F — deep-winter weather.
How do you convert Celsius to Fahrenheit?
Multiply the Celsius reading by 1.8, then add 32 — that is the whole formula, worked through above. For a temperature change rather than a reading, multiply by 1.8 alone: the 32 only fixes where zero sits, so it does not belong in a difference.
What is 0 °C in Fahrenheit?
0 °C is 32 °F — the freezing point of water at sea level.
What is 10 °C in Fahrenheit?
10 °C is 50 °F — a cool day, and the one temperature the "double it and add 30" shortcut gets exactly right.
What is 20 degrees Celsius in Fahrenheit?
20 °C is 68 °F — a mild room temperature.
What is 22 degrees Celsius in Fahrenheit?
22 °C is 71.6 °F — about where a room thermostat usually sits.
What is 25 degrees Celsius in Fahrenheit?
25 °C is 77 °F — a warm room, and a warm summer day.
What is 30 degrees Celsius in Fahrenheit?
30 °C is 86 °F — a hot day.
What is 37 °C in Fahrenheit?
37 °C is 98.6 °F — the figure usually quoted for normal body temperature.
What is 40 degrees Celsius in Fahrenheit?
40 °C is 104 °F — extreme heat as weather, and a dangerous fever as a body temperature.
What is 50 degrees Celsius in Fahrenheit?
50 °C is 122 °F — double the 25 °C of a warm room, and the kind of figure that appears in extreme-heat warnings rather than forecasts.
What is 100 °C in Fahrenheit?
100 °C is 212 °F — the boiling point of water at sea level, and 100 of the 180 Fahrenheit degrees that make the 1.8 in the formula.
What is 180 °C in Fahrenheit for an oven?
180 °C is 356 °F. Most ovens are marked in steps of 25 °F, so recipes usually round this to 350 °F, and a fan oven is set about 20 °C lower — 160 °C — for the same result.
What is 200 °C in Fahrenheit for an oven?
200 °C is 392 °F, which recipes often round to 400 °F.
At what temperature are Celsius and Fahrenheit the same?
At −40. −40 °C is exactly -40 °F, and it is the only point where the two scales meet.
Is a 1 degree Celsius change the same as 1 degree Fahrenheit?
No. A change of 1 °C is a change of 1.8 °F. The reading 1 °C is 33.8 °F, which is a different question — see the note above.
Keep going
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- The Celsius to Fahrenheit formula, explained Guide
- Oven temperature conversion: Celsius, Fahrenheit and gas marks Guide
- Celsius to Fahrenheit chart, −40 to 300 Guide
- Air fryer temperature conversion: oven recipes, adjusted Guide
Every factor on this page is listed in our conversion methodology.