Temperature Conversion Calculator

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.

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.

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.

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.

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.

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).

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.