Temperature Unit Converter - Celsius, Fahrenheit, Kelvin Online Free

Whether you’re baking a cake using an American recipe, checking the weather forecast for a Florida vacation, or calculating thermodynamic equations at school, our calculator provides an instant answer.

We support lightning-fast conversions between the three most commonly used temperature scales (Celsius, Fahrenheit, Kelvin). Our tool connects everyday life with scientific precision. Everything works online, for free, and without any installation required.

Smart Calculations: Why Convert Temperature Here?

Temperature is a specific quantity – unlike length or weight, simple multiplication doesn’t work here. Formulas like (°F − 32) × 5/9 are difficult to calculate mentally. Our tool does the hard work for you.

1. Real-time calculations: No waiting for the page to load. Results update automatically as you type a number.
2. Handles negative values: We correctly convert even deep freezes, which is crucial for travel or scientific tasks.
3. Scientific and practical context: The calculator handles both common oven temperatures (e.g., 350 °F) and extreme industrial temperatures (as seen in the example of 1000 °C) or absolute zero in Kelvin.

Comprehensive Overview: Understanding Temperature Scales

The world is divided when it comes to temperature measurement. While Europe uses Celsius, the USA sticks to Fahrenheit, and scientists swear by Kelvin. Here’s an overview of the relationships between them:

Instructions: How to Use the Converter Correctly

The controls are designed to be as intuitive as possible, saving you from complicated formula calculations.

1. Enter the Value

Enter the temperature into the left field.

• Tip: You can also enter negative numbers (e.g., -20 for freezing temperatures) or decimals.

2. Select Scales

• Select the scale you know in the left menu (e.g., “Fahrenheit” from a recipe).
• Select the scale you want to use in the right menu (e.g., “Celsius”).
• The arrow button in the middle is for quick swapping (Swap).

3. Analyze the “Quick Overview”

The table below the widget shows you the value in all other scales simultaneously.

• For example, when entering 1000 °C (oven or volcanic lava temperature), you immediately see that in Fahrenheit it’s 1832 °F and in Kelvin it’s 1273.15 K.

Common Mistakes and Myths About Temperature

Temperature conversion is tricky because the scales don’t share a common zero point (except for the Kelvin-Celsius relationship, where there’s an offset).

Why isn’t 0 °C equal to 0 °F? While 0 meters is the same as 0 yards (simply nothing), this isn’t true for temperature.

• 0 °C is the temperature at which water freezes.
• At the same moment, on the Fahrenheit scale, it is 32 °F.
• This is why you can’t simply multiply temperature by a coefficient. Our converter automatically accounts for this offset (+32 or +273.15).

Kelvin doesn’t have degrees Notice in our converter that Kelvin lacks the degree symbol (°).

• The correct way to say it is “20 Kelvin”, not “20 degrees Kelvin”.
• Kelvin is an absolute thermodynamic temperature, where 0 K is absolute zero (the cessation of particle motion). You cannot go lower.

Practical Examples: When will you find the converter useful?

To give you a better idea of the values:

• Baking (USA recipes): If a recipe says “Bake at 350 °F”, enter it into the calculator -> you’ll find that you need to set your oven to approx. 180 °C.
• Fever: In the USA, 100 °F or more is considered a fever. Our converter will show you that this corresponds to 37.8 °C.
• Travel: If the forecast in Miami says 70 °F, don’t pack a winter coat. That’s a pleasant 21 °C.
• Absolute zero: -273.15 °C = 0 K.

Frequently Asked Questions (FAQ)