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Temperature Converter

Celsius to Fahrenheit Converter

Celsius to Fahrenheit with a fast local calculator, clear formula, and practical examples.

Quick answer

-40 deg C = -40 deg F

Convert Celsius to Fahrenheit using the formula shown below. This temperature converter is useful for weather, cooking, science, HVAC, and travel planning.

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Temperature

Celsius to Fahrenheit Converter

Try common values

Unit relationship: 1 deg C = 33.8 deg F and 1 deg F = -17.2222 deg C.

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Formula

fahrenheit = celsius x 9 / 5 + 32

This calculator uses the standard conversion formula and rounds the final answer to 4 decimal places.

Formula explorer

How the deg C to deg F formula works

offset formula

1. Formula

fahrenheit = celsius x 9 / 5 + 32

2. Worked example

-40 deg C = -40 deg F

Start with -40 celsius, apply the formula, then round the result.

3. Reverse check

Fahrenheit to Celsius Converter

Use the reverse converter to check the answer or go from fahrenheit back to celsius.

Temperature conversions often need an offset because the zero points of celsius and fahrenheit are different. Follow the formula order exactly before rounding.

When to Use This Converter

Use this converter when you need a quick answer for everyday measurements, unit comparisons, worksheets, recipes, product listings, travel planning, or project notes.

For best results, enter the numeric value only. The conversion runs locally in your browser.

Quick guide

Common Celsius to Fahrenheit questions

Celsius is common globally, while Fahrenheit is common for weather and cooking in the United States.

  • A quick estimate is to double Celsius and add 30.
  • For exact results, this page uses fahrenheit = celsius x 9 / 5 + 32.
  • Use this for travel weather, oven temperatures, science class, and recipe checks.
Fahrenheit to CelsiusCelsius to KelvinTemperature converters

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Unit encyclopedia

About these units

Celsius (deg C)

Definition
Celsius is a temperature scale where water freezes at 0 degrees and boils at 100 degrees at standard pressure.
Common usage
Weather, cooking, science, HVAC, travel, and classroom measurements.
Where it is used
Used in most countries worldwide for everyday temperature.
Quick note
To convert Celsius to Fahrenheit, multiply by 9/5 and add 32.

Explore this unit

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Fahrenheit (deg F)

Definition
Fahrenheit is a temperature scale where water freezes at 32 degrees and boils at 212 degrees at standard pressure.
Common usage
Weather, cooking temperatures, thermostats, and health measurements.
Where it is used
Common in the United States and a few related contexts.
Quick note
To convert Fahrenheit to Celsius, subtract 32 and multiply by 5/9.

Explore this unit

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Common Tools Used to Measure Temperature

Temperature conversions usually start from a thermometer or a temperature reading.

Digital thermometer
Cooking thermometer
Weather app or weather station
Infrared thermometer

For cooking, always follow food-safety guidance and use the thermometer reading directly.

Example Conversions

CelsiusFahrenheit
-40 deg C-40 deg F
0 deg C32 deg F
10 deg C50 deg F
20 deg C68 deg F
37 deg C98.6 deg F
100 deg C212 deg F

Printable conversion table

Celsius to Fahrenheit chart, 1 to 100

Scan common values, print the table, copy it, or download a CSV for worksheets, notes, spreadsheets, and quick reference.

Celsius (deg C)Fahrenheit (deg F)
1 deg C33.8 deg F
2 deg C35.6 deg F
3 deg C37.4 deg F
4 deg C39.2 deg F
5 deg C41 deg F
6 deg C42.8 deg F
7 deg C44.6 deg F
8 deg C46.4 deg F
9 deg C48.2 deg F
10 deg C50 deg F
11 deg C51.8 deg F
12 deg C53.6 deg F
13 deg C55.4 deg F
14 deg C57.2 deg F
15 deg C59 deg F
16 deg C60.8 deg F
17 deg C62.6 deg F
18 deg C64.4 deg F
19 deg C66.2 deg F
20 deg C68 deg F
21 deg C69.8 deg F
22 deg C71.6 deg F
23 deg C73.4 deg F
24 deg C75.2 deg F
25 deg C77 deg F
26 deg C78.8 deg F
27 deg C80.6 deg F
28 deg C82.4 deg F
29 deg C84.2 deg F
30 deg C86 deg F
31 deg C87.8 deg F
32 deg C89.6 deg F
33 deg C91.4 deg F
34 deg C93.2 deg F
35 deg C95 deg F
36 deg C96.8 deg F
37 deg C98.6 deg F
38 deg C100.4 deg F
39 deg C102.2 deg F
40 deg C104 deg F
41 deg C105.8 deg F
42 deg C107.6 deg F
43 deg C109.4 deg F
44 deg C111.2 deg F
45 deg C113 deg F
46 deg C114.8 deg F
47 deg C116.6 deg F
48 deg C118.4 deg F
49 deg C120.2 deg F
50 deg C122 deg F
51 deg C123.8 deg F
52 deg C125.6 deg F
53 deg C127.4 deg F
54 deg C129.2 deg F
55 deg C131 deg F
56 deg C132.8 deg F
57 deg C134.6 deg F
58 deg C136.4 deg F
59 deg C138.2 deg F
60 deg C140 deg F
61 deg C141.8 deg F
62 deg C143.6 deg F
63 deg C145.4 deg F
64 deg C147.2 deg F
65 deg C149 deg F
66 deg C150.8 deg F
67 deg C152.6 deg F
68 deg C154.4 deg F
69 deg C156.2 deg F
70 deg C158 deg F
71 deg C159.8 deg F
72 deg C161.6 deg F
73 deg C163.4 deg F
74 deg C165.2 deg F
75 deg C167 deg F
76 deg C168.8 deg F
77 deg C170.6 deg F
78 deg C172.4 deg F
79 deg C174.2 deg F
80 deg C176 deg F
81 deg C177.8 deg F
82 deg C179.6 deg F
83 deg C181.4 deg F
84 deg C183.2 deg F
85 deg C185 deg F
86 deg C186.8 deg F
87 deg C188.6 deg F
88 deg C190.4 deg F
89 deg C192.2 deg F
90 deg C194 deg F
91 deg C195.8 deg F
92 deg C197.6 deg F
93 deg C199.4 deg F
94 deg C201.2 deg F
95 deg C203 deg F
96 deg C204.8 deg F
97 deg C206.6 deg F
98 deg C208.4 deg F
99 deg C210.2 deg F
100 deg C212 deg F

Frequently Asked Questions

How do I convert celsius to fahrenheit?

Use the formula fahrenheit = celsius x 9 / 5 + 32. Enter a value in the calculator above to get a rounded result instantly.

Is this converter free?

Yes. The conversion runs locally in your browser, with no account, database, or paid API.

How many decimal places are shown?

Results are rounded to 4 decimal places for a practical balance of accuracy and readability.