What Is a Temperature Converter?
A temperature converter translates values between Celsius, Fahrenheit, and Kelvin scales. These three systems are used worldwide in science, weather forecasting, cooking, and everyday life, making quick conversion essential.
How to Use This Temperature Converter
- Enter the temperature value you want to convert.
- Select the source unit (Celsius, Fahrenheit, or Kelvin).
- View the converted results in the other scales instantly.
Key Concepts
The core formulas are: Celsius to Fahrenheit: F = C × 9/5 + 32. Fahrenheit to Celsius: C = (F − 32) × 5/9. Celsius to Kelvin: K = C + 273.15. Water freezes at 0°C (32°F, 273.15K) and boils at 100°C (212°F, 373.15K). Kelvin starts at absolute zero (−273.15°C), the lowest possible temperature in physics.
Frequently Asked Questions
At what temperature are Celsius and Fahrenheit equal?
−40 degrees is the same in both scales. Setting C = F in the formula yields −40 as the intersection point.
Why does science use Kelvin?
Kelvin is an absolute scale starting at absolute zero, making it ideal for thermodynamic calculations where negative temperatures would be meaningless.
How do I quickly estimate Celsius to Fahrenheit?
Double the Celsius value and add 30 for a rough estimate. For example, 20°C ≈ 70°F (actual: 68°F). This shortcut works well for everyday temperatures.