Temperature Converter
Use our free online temperature converter to switch instantly between Celsius, Fahrenheit, and Kelvin. Get accurate unit conversions for study, travel, cooking, science, and weather. Perfect for students, researchers, and everyday use with real-time temperature reference.
Water freezes at 0°C and boils at 100°C
Water freezes at 32°F and boils at 212°F
0K is absolute zero, water freezes at 273.15K
Enter a temperature to see conversion formulas
| Phenomenon | °C | °F | K |
|---|---|---|---|
| Absolute Zero | -273.15 | -459.67 | 0 |
| Water Freezes | 0 | 32 | 273.15 |
| Room Temp | 20-25 | 68-77 | 293-298 |
| Body Temp | 37 | 98.6 | 310.15 |
| Water Boils | 100 | 212 | 373.15 |
Celsius (°C)
Used in most countries worldwide. Water freezes at 0°C and boils at 100°C at sea level.
Fahrenheit (°F)
Primarily used in the United States. Water freezes at 32°F and boils at 212°F.
Kelvin (K)
The base unit of temperature in the International System of Units (SI). 0K is absolute zero.
Complete Guide to Temperature Conversion
Why Different Temperature Scales?
Different temperature scales were developed for different purposes. Celsius was designed around water's phase changes, Fahrenheit was based on a brine solution's freezing point, and Kelvin was developed for scientific measurements starting from absolute zero.
Practical Applications
Everyday Use
- Weather forecasts
- Cooking temperatures
- Home/office climate control
- Medical measurements
Scientific Use
- Chemical reactions
- Physics experiments
- Astronomical measurements
- Engineering calculations
Conversion Tips
- For quick Celsius to Fahrenheit estimates: Double and add 30 (approximate)
- Remember that -40°C = -40°F (the scales intersect at this point)
- Kelvin values are always positive (absolute zero is 0K)
- Temperature differences in Celsius and Kelvin are equal (1°C = 1K difference)
Professional Tips
- For scientific work, always use Kelvin for calculations
- When converting between scales, maintain appropriate significant figures
- Be aware of regional preferences when communicating temperatures
- Consider using temperature conversion apps for frequent conversions