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Temperature Converter

Convert temperatures between Celsius, Fahrenheit, Kelvin, and Rankine scales with instant results.

Quick Examples

Enter the temperature value you want to convert
Select the unit of the temperature you entered
Number of decimal places to display in the result

About This Calculator

This temperature converter allows you to quickly and accurately convert between the most common temperature scales: • Celsius (°C) - Used in most countries worldwide • Fahrenheit (°F) - Used primarily in the United States • Kelvin (K) - Used in scientific applications, starts at absolute zero • Rankine (°R) - Used in some engineering fields in the US Whether you're cooking with international recipes, interpreting weather forecasts from different countries, working on scientific calculations, or just curious about temperature equivalents, this calculator provides instant and accurate conversions. Simply enter a temperature value and select its unit, and the calculator will instantly display the equivalent temperatures in all other units.

Frequently Asked Questions

What is the formula to convert Celsius to Fahrenheit?

To convert Celsius to Fahrenheit, use the formula: °F = (°C × 9/5) + 32. For example, 20°C equals 68°F.

What is the formula to convert Fahrenheit to Celsius?

To convert Fahrenheit to Celsius, use the formula: °C = (°F - 32) × 5/9. For example, 68°F equals 20°C.

What is Kelvin and how do I convert it to Celsius?

Kelvin (K) is an absolute temperature scale used in science, where 0 K is absolute zero (the theoretical lowest possible temperature). To convert Kelvin to Celsius, simply subtract 273.15: °C = K - 273.15. To convert Celsius to Kelvin, add 273.15: K = °C + 273.15.

What is the Rankine scale?

The Rankine scale (°R) is an absolute temperature scale used in some engineering fields, primarily in the United States. It's related to Fahrenheit the same way Kelvin is related to Celsius. To convert Rankine to Fahrenheit: °F = °R - 459.67. To convert Fahrenheit to Rankine: °R = °F + 459.67.

What are some key temperature reference points?

Key temperature reference points include: Absolute zero (0 K, -273.15°C, -459.67°F), Freezing point of water (0°C, 32°F, 273.15 K), Room temperature (about 20-22°C, 68-72°F), Normal human body temperature (approximately 37°C, 98.6°F), and Boiling point of water at sea level (100°C, 212°F, 373.15 K).