Temperature Converter
Convert between Celsius, Fahrenheit, Kelvin, Rankine, Reaumur, Delisle, Newton, and Romer instantly.
About Temperature Converter
Our Temperature Converter is a comprehensive tool that allows you to convert temperature measurements between different scales seamlessly. Whether you're working on scientific research, engineering calculations, cooking recipes, or weather analysis, this tool provides accurate conversions across eight commonly used temperature scales.
The tool supports conversions between Celsius (°C), Fahrenheit (°F), Kelvin (K), Rankine (°R), Reaumur (°Re), Delisle (°D), Newton (°N), and Romer (°Ro). All conversions are calculated with high precision using standard thermodynamic formulas and displayed instantly as you type or change units.
Temperature is a fundamental physical property that measures the average kinetic energy of particles in matter. Different scales were developed for various scientific, industrial, and everyday applications. Our converter bridges all these systems, making it easy to work across different measurement standards.
Convert From
Temperature Scale Reference
| Description | Celsius | Fahrenheit | Kelvin |
|---|---|---|---|
| Absolute Zero | -273.15°C | -459.67°F | 0 K |
| Freezing Point of Water | 0°C | 32°F | 273.15 K |
| Room Temperature | 20°C | 68°F | 293.15 K |
| Normal Body Temperature | 37°C | 98.6°F | 310.15 K |
| Boiling Point of Water | 100°C | 212°F | 373.15 K |
How to Use
Enter the Temperature Value
Type the numerical value of the temperature you want to convert in the "Temperature Value" field. You can enter whole numbers, decimals, or negative values. The input accepts any valid number.
Select the Original Unit
Choose the unit of your input value from the "From Unit" dropdown. Options include Celsius (°C), Fahrenheit (°F), Kelvin (K), Rankine (°R), Reaumur (°Re), Delisle (°D), Newton (°N), and Romer (°Ro).
Select the Target Unit
Choose the unit you want to convert to from the "To Unit" dropdown. You can also use the "Swap Units" button to quickly switch between the source and target units.
View Results
Click "Convert" to see the result. The tool will display the converted value, the formula used, and all possible conversions from your original value to every supported unit.
Common Conversions
Quick links to frequently used temperature conversions. Click any link to see the instant result.
Frequently Asked Questions
What are the different temperature scales?
Celsius (°C): The most common scale worldwide, where water freezes at 0°C and boils at 100°C. Fahrenheit (°F): Used primarily in the United States, where water freezes at 32°F and boils at 212°F. Kelvin (K): The SI unit for temperature, used in scientific work. 0 K is absolute zero. Rankine (°R): An absolute scale using Fahrenheit degrees, used in engineering. Reaumur (°Re): Historical scale where water freezes at 0°Re and boils at 80°Re. Delisle (°D): Historical scale where higher values mean colder temperatures. Newton (°N): Historical scale where water freezes at 0°N and boils at 33°N. Romer (°Ro): Historical scale where water freezes at 7.5°Ro and boils at 60°Ro.
How do I convert Celsius to Fahrenheit?
To convert from Celsius to Fahrenheit: °F = (°C × 9/5) + 32. For example, 20°C = (20 × 9/5) + 32 = 68°F. To convert from Fahrenheit to Celsius: °C = (°F - 32) × 5/9. Our tool handles all these formulas automatically.
What is absolute zero?
Absolute zero is the lowest possible temperature, where all thermal motion of particles ceases. It is defined as 0 Kelvin, -273.15°C, -459.67°F, or 0°R. At this temperature, particles have minimal vibrational motion. It's physically impossible to reach absolute zero, though scientists have come extremely close.
Why do Celsius and Fahrenheit intersect at -40?
At -40°, the Celsius and Fahrenheit scales have the same numerical value. This occurs because the linear conversion formula °F = (°C × 9/5) + 32 yields -40 = (-40 × 9/5) + 32. This is the only point where both scales show the same number.
When should I use Kelvin instead of Celsius?
Kelvin is used in scientific calculations, especially in physics and chemistry, because it's an absolute scale starting at zero. It's essential for thermodynamic equations, gas laws, and any calculations involving temperature ratios. Celsius is more practical for everyday use and weather measurements.
Is this tool free to use?
Absolutely! Our Temperature Converter is completely free to use, with no registration required. We believe in providing high-quality, accessible tools for students, engineers, scientists, and anyone who needs to perform temperature conversions quickly and accurately.