Temperature Converter
Convert Celsius, Fahrenheit, Kelvin, and Rankine instantly. Use this simple calculator for weather, science, cooking, HVAC, education, and daily temperature conversions.
Convert Temperature
Enter a value, choose the units, and get an accurate conversion instantly.
Conversion Formula
Choose units and enter a value to see the formula.
Temperature Conversion Formulas
Celsius to Fahrenheit: °F = (°C × 9/5) + 32
Fahrenheit to Celsius: °C = (°F - 32) × 5/9
Celsius to Kelvin: K = °C + 273.15
Kelvin to Celsius: °C = K - 273.15
Fahrenheit to Kelvin: K = (°F - 32) × 5/9 + 273.15
Kelvin to Fahrenheit: °F = (K - 273.15) × 9/5 + 32
Common Temperature Points
| Reference | °C | °F | K |
|---|---|---|---|
| Absolute zero | -273.15 | -459.67 | 0 |
| Water freezes | 0 | 32 | 273.15 |
| Room temperature | 20 | 68 | 293.15 |
| Body temperature | 37 | 98.6 | 310.15 |
| Water boils | 100 | 212 | 373.15 |
About This Temperature Converter
This free temperature converter helps you quickly convert values between Celsius, Fahrenheit, Kelvin, and Rankine. It is useful for students, teachers, engineers, weather readers, cooking measurements, laboratory work, heating and cooling calculations, and general everyday conversions.
The calculator updates instantly as you type and displays the correct conversion formula for the selected units. Whether you need Celsius to Fahrenheit, Fahrenheit to Celsius, Kelvin to Celsius, or Rankine conversion, this tool gives a clean and simple result without requiring registration.
For best accuracy, the tool uses standard temperature conversion equations and formats very large or very small values in a readable way. You can also copy or share your conversion result with one click.
Celsius
Celsius is commonly used worldwide for weather, science, cooking, and daily temperature measurement.
Fahrenheit
Fahrenheit is commonly used in the United States for weather forecasts, home thermostats, and body temperature.
Kelvin
Kelvin is widely used in science and engineering because it starts at absolute zero.
Frequently Asked Questions
How do I convert Celsius to Fahrenheit?
Multiply the Celsius value by 9/5, then add 32. For example, 25°C equals 77°F.
How do I convert Fahrenheit to Celsius?
Subtract 32 from the Fahrenheit value, then multiply by 5/9. For example, 68°F equals 20°C.
What is the difference between Celsius and Kelvin?
Celsius is based on water freezing at 0°C and boiling at 100°C. Kelvin is an absolute temperature scale where 0K is absolute zero.
Can I use this tool on mobile?
Yes. The temperature converter is responsive and works on desktop, tablet, and mobile devices.