Temperature Converter
Convert temperatures between Celsius, Fahrenheit and Kelvin instantly and accurately. No signup. Ideal for weather, cooking, science, travel and everyday use.
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This temperature converter turns temperatures between Celsius, Fahrenheit and Kelvin, directly in your browser. Enter a temperature and its scale, and see the equivalent in the others. No account, no install, so you can convert temperatures for weather, cooking, science and travel on any device in seconds.
How to Convert Temperature Step by Step
- Enter the temperature. Type the temperature value you want to convert into the input field, such as a weather temperature or a value from a recipe.
- Choose the starting scale. Select the scale your temperature is in, whether Celsius, Fahrenheit, or Kelvin, so the converter knows how to interpret it.
- Convert to other scales. The tool converts your temperature into the other scales, showing the equivalent values so you can see it expressed however you need.
- Read the equivalents. See your temperature in the other scales, letting you understand it in whichever scale is familiar or required for your purpose.
- Use the converted value. Apply the converted temperature to your weather understanding, cooking, science, or travel, working in whichever scale suits your need.
What the Temperature Scales Are
Temperature is measured on three main scales: Celsius, used in most of the world for everyday temperatures; Fahrenheit, used mainly in the United States; and Kelvin, the scientific scale used in physics. Because different regions and fields use different scales, converting between them is a common need, whether understanding foreign weather, following a recipe, or working with scientific temperatures.
The scales differ in both their zero points and their degree sizes, which is what makes temperature conversion more than simple multiplication. Celsius and Kelvin share the same degree size but have different zero points, while Fahrenheit has both a different zero point and a different degree size from Celsius. This means converting between them involves both scaling and shifting, not just multiplying by a factor as with many other unit conversions.
This is the key thing that makes temperature conversion trip people up. Unlike converting, say, metres to feet, where you just multiply by a factor, converting temperatures requires accounting for the different zero points as well as the different degree sizes. The formulas involve both a multiplication and an addition or subtraction. Doing this correctly by hand is easy to get wrong, which is why a converter that applies the right formulas is so useful.
Temperature conversion is needed in many everyday and specialised situations. Travellers understand foreign weather forecasts by converting between Celsius and Fahrenheit. Cooks follow recipes that use a different scale than their oven. Scientists and students work with Kelvin alongside Celsius. In each case, converting turns a temperature in an unfamiliar scale into a familiar one, and a converter handles the slightly involved formulas accurately every time.
Why Temperature Conversion Is Not Just Multiplying
| Scale | Used for | Note |
|---|---|---|
| Celsius | Everyday temperatures worldwide | Common in most countries |
| Fahrenheit | Everyday temperatures in the US | Different zero and degree size |
| Kelvin | Science and physics | The scientific scale |
| Converting | Involves scaling and shifting | Not just a simple factor |
Who Uses a Temperature Converter
Pro Tips for Temperature Conversions
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Frequently Asked Questions
How do I convert temperature?
Enter the temperature value and select its scale, whether Celsius, Fahrenheit or Kelvin, and the tool converts it into the other scales, showing the equivalent values. This lets you understand a temperature in whichever scale is familiar or required. Because the scales differ in both their zero points and degree sizes, the conversion involves both scaling and shifting, which the converter handles with the correct formulas, giving accurate results without the errors that manual temperature conversion easily introduces.
What are the temperature scales?
There are three main temperature scales. Celsius is used in most of the world for everyday temperatures. Fahrenheit is used mainly in the United States for everyday temperatures. Kelvin is the scientific scale used in physics. The scales differ in their zero points and, in the case of Fahrenheit compared to Celsius, their degree sizes. Because different regions and fields use different scales, converting between them is a common need, whether for understanding foreign weather, following recipes, or working with scientific temperatures.
Why is temperature conversion not just multiplying?
Because the temperature scales differ in both their zero points and their degree sizes, unlike many unit conversions where you simply multiply by a factor. Celsius and Kelvin share the same degree size but have different zero points, while Fahrenheit has both a different zero point and a different degree size from Celsius. So converting between them involves both scaling, to account for the different degree sizes, and shifting, to account for the different zero points. This means the conversion formulas include both a multiplication and an addition or subtraction, which is why it is not just multiplying.
What is the difference between Celsius, Fahrenheit and Kelvin?
Celsius is used for everyday temperatures in most of the world, with familiar reference points for water freezing and boiling. Fahrenheit, used mainly in the United States, has a different zero point and a different degree size, so the same temperature is a different number on each. Kelvin is the scientific scale, sharing Celsius's degree size but with a different zero point, starting from the lowest possible temperature. Each scale suits its context, and converting between them accounts for these differences in zero points and degree sizes.
Why do people confuse temperature scales?
Because the same number represents very different temperatures on different scales, so mixing them up leads to a wildly wrong understanding. A given value in Celsius is a much different actual temperature than the same value in Fahrenheit. This is compounded by the fact that different regions use different scales, so a temperature encountered abroad may be in an unfamiliar scale. Being clear about which scale a temperature is in is essential before converting or interpreting it, since confusing the scales gives a completely misleading sense of how warm or cold it is.
How do I convert oven temperatures for a recipe?
When a recipe uses a different temperature scale than your oven, enter the recipe's temperature and its scale into the converter to see the equivalent in your oven's scale, then set the oven accordingly. This is important because oven temperature significantly affects cooking, so an accurate conversion matters. Converting carefully ensures you set the right temperature, rather than risking an error from a rough estimate. The converter applies the correct formula, giving you the precise oven temperature to use for the recipe in your familiar scale.
What is Kelvin used for?
Kelvin is the scientific temperature scale, used in physics and other sciences. It shares the same degree size as Celsius but has a different zero point, starting from the lowest possible temperature, which makes it suited to scientific work where an absolute scale is useful. When working with scientific temperatures, values are often given in Kelvin, but you may need to relate them to everyday Celsius or Fahrenheit to understand them, or convert everyday temperatures into Kelvin for scientific calculations, which a temperature converter makes straightforward and accurate.
Is the temperature converter free?
Yes, it is completely free with no account and no usage limit. You can convert as many temperatures between Celsius, Fahrenheit and Kelvin as you like, as often as you like, at no cost. It runs entirely in your browser on any device, so there is nothing to download or install, and the equivalent temperatures in the other scales appear instantly whenever you enter a value and choose its scale, helping with weather, cooking, science and travel.