Temperature Conversion Calculator

Different countries and scientific fields use different temperature scales, so the same temperature can look like a completely different number depending on the unit. Enter your Temperature Value and select your From Unit and To Unit — choosing from Celsius (°C), Fahrenheit (°F), Kelvin (K), or Rankine (°R) — to get the Converted Temperature. The calculator also displays all four scale equivalents at once, so you can see every conversion in a single view.

Results

Converted Temperature

--

Celsius

--

Fahrenheit

--

Kelvin

--

Rankine

--

More Chemistry Tools

Frequently Asked Questions

What is the difference between Celsius and Fahrenheit?

Celsius uses the freezing point of water (0°C) and boiling point (100°C) as reference points, while Fahrenheit uses 32°F for freezing and 212°F for boiling water. Celsius is used in most countries worldwide, while Fahrenheit is primarily used in the United States.

What is Kelvin and why is it used?

Kelvin is an absolute temperature scale starting at absolute zero (-273.15°C). It's the base unit of thermodynamic temperature in the International System of Units and is widely used in scientific calculations because it has no negative values.

What is the Rankine temperature scale?

Rankine is an absolute temperature scale that uses Fahrenheit-sized degrees but starts at absolute zero (0°R = -459.67°F). It's primarily used in engineering applications in the United States, particularly in thermodynamics.

How do I convert Celsius to Fahrenheit?

To convert Celsius to Fahrenheit, multiply the Celsius temperature by 9/5 (or 1.8) and add 32. The formula is: °F = (°C × 9/5) + 32. For example, 25°C = (25 × 9/5) + 32 = 77°F.

What is absolute zero in different temperature scales?

Absolute zero is the theoretical temperature where all molecular motion stops. It equals -273.15°C, -459.67°F, 0K (Kelvin), and 0°R (Rankine). This is the coldest possible temperature in the universe.

Which temperature scale should I use for cooking?

For cooking, use the scale common in your region. Most recipes worldwide use Celsius, while American recipes typically use Fahrenheit. Oven temperatures are usually given as whole numbers (e.g., 180°C or 350°F).

Can temperatures go below absolute zero?

No, temperatures cannot go below absolute zero. Absolute zero represents the complete absence of thermal energy, making it the theoretical lower limit of temperature. Any temperature scale shows this as its zero point (Kelvin) or equivalent negative value.