🌡️ Temperature Converter - Celsius, Fahrenheit, Kelvin
Convert temperature between Celsius, Fahrenheit, and Kelvin. Free online temperature converter with instant results.
Temperature Reference
| Description | Celsius | Fahrenheit | Kelvin |
|---|---|---|---|
| Freezing Point | 0°C | 32°F | 273.15 K |
| Room Temperature | 20°C | 68°F | 293.15 K |
| Body Temperature | 37°C | 98.6°F | 310.15 K |
| Boiling Point | 100°C | 212°F | 373.15 K |
| Absolute Zero | -273.15°C | -459.67°F | 0 K |
Temperature Conversion Formulas
Celsius to Fahrenheit
°F = (°C × 9/5) + 32
Example: 25°C = (25 × 9/5) + 32 = 77°F
Fahrenheit to Celsius
°C = (°F - 32) × 5/9
Example: 77°F = (77 - 32) × 5/9 = 25°C
Celsius to Kelvin
K = °C + 273.15
Example: 25°C = 25 + 273.15 = 298.15 K
Kelvin to Celsius
°C = K - 273.15
Example: 298.15 K = 298.15 - 273.15 = 25°C
How to Use Our Temperature Converter
- Enter Temperature: Type a temperature value in any of the three fields (Celsius, Fahrenheit, or Kelvin).
- Auto-Conversion: With auto-convert enabled, the other two fields will update automatically as you type.
- Manual Conversion: Disable auto-convert and click the "Convert" button to convert manually.
- Use Examples: Click on any example to quickly fill in common temperature values.
- Copy Results: Click the copy button next to any temperature value to copy it to your clipboard.
Temperature Scales Explained
Celsius (°C)
The Celsius scale is used in most of the world. Water freezes at 0°C and boils at 100°C at standard atmospheric pressure. Named after Swedish astronomer Anders Celsius.
Fahrenheit (°F)
The Fahrenheit scale is primarily used in the United States. Water freezes at 32°F and boils at 212°F at standard atmospheric pressure. Named after German physicist Daniel Gabriel Fahrenheit.
Kelvin (K)
The Kelvin scale is the SI base unit for temperature and is used in scientific applications. Absolute zero (0 K) is the lowest possible temperature. Water freezes at 273.15 K and boils at 373.15 K. Named after Scottish physicist William Thomson, 1st Baron Kelvin.
Common Use Cases
🌡️ Weather
Convert weather temperatures between Celsius (used internationally) and Fahrenheit (used in the US). Essential for understanding weather forecasts when traveling.
👨🍳 Cooking
Convert oven temperatures between Celsius and Fahrenheit when following recipes from different countries. Critical for baking and cooking accuracy.
🔬 Science & Education
Convert temperatures for scientific calculations, experiments, and educational purposes. Kelvin is essential for physics and chemistry calculations.
🏭 Engineering
Convert temperatures for engineering applications, manufacturing processes, and technical specifications. Important for international collaboration.
Frequently Asked Questions
What is absolute zero?
Absolute zero is 0 Kelvin (-273.15°C or -459.67°F), the theoretical lowest possible temperature where all molecular motion stops. It's impossible to reach absolute zero, but scientists have come very close.
Why is Kelvin used in science?
Kelvin is an absolute temperature scale starting from absolute zero, making it ideal for scientific calculations. It doesn't have negative values and is directly proportional to the energy of particles.
What's the difference between Celsius and Fahrenheit?
The main difference is the freezing and boiling points of water: 0°C/100°C vs 32°F/212°F. Celsius uses a 100-degree scale between these points, while Fahrenheit uses a 180-degree scale. Celsius is more intuitive for scientific use, while Fahrenheit provides finer granularity for weather.
How accurate are the conversions?
Our converter uses precise formulas and rounds results to 2 decimal places for readability. The calculations are mathematically accurate and suitable for most practical purposes.
Is my data stored or transmitted?
No, all conversions happen entirely in your browser. We never see, store, or transmit any of your temperature values. Your privacy is completely protected.