Temperature Converter
Convert between different temperature units including Celsius (°C), Fahrenheit (°F), and Kelvin (K).
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin. Temperature conversions use special formulas due to different zero points.
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Enter a temperature value to see conversions
Understanding Temperature Conversions
Temperature conversion requires special formulas because different scales have different zero points and intervals.
Temperature Scales:
- Celsius (°C): Metric system, water freezes at 0°C and boils at 100°C
- Fahrenheit (°F): US system, water freezes at 32°F and boils at 212°F
- Kelvin (K): Absolute temperature scale, 0 K = absolute zero (-273.15°C)
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
Common Reference Points:
- Absolute Zero: -273.15°C = -459.67°F = 0 K
- Water Freezes: 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
- Water Boils: 100°C = 212°F = 373.15 K
Frequently Asked Questions
How do I convert Celsius to Fahrenheit?
Multiply the Celsius value by 9/5 and add 32. For example, 20°C × 9/5 + 32 = 68°F.
How do I convert Fahrenheit to Celsius?
Subtract 32, then multiply by 5/9. For example, (98.6°F − 32) × 5/9 = 37°C.
What is absolute zero in each scale?
Absolute zero is 0 K, which equals −273.15°C or −459.67°F. It is the lowest possible temperature, where molecular motion stops.
At what temperature do Celsius and Fahrenheit meet?
−40° is the same in both scales: −40°C = −40°F. It is the only point where the two readings are identical.