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- Free Temperature Converter — Celsius Fahrenheit Kelvin
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✦ Free Online Tool
FREE TEMPERATURE CONVERTER
Convert between Celsius, Fahrenheit and Kelvin instantly. Free temperature converter online, no signup.
°C Celsius
°F Fahrenheit
K Kelvin
°R Rankine
Temperature Reference Points
- Absolute zero: -273.15°C / -459.67°F / 0K
- Water freezes: 0°C / 32°F / 273.15K
- Room temperature: 20-22°C / 68-72°F
- Body temperature: 37°C / 98.6°F
- Water boils: 100°C / 212°F / 373.15K
Frequently Asked Questions
What units are supported?+
Celsius (°C), Fahrenheit (°F), Kelvin (K) and Rankine (°R).
What is the formula for Celsius to Fahrenheit?+
°F = (°C × 9/5) + 32. For example: 100°C = 212°F.
What is Kelvin?+
Kelvin is the SI unit of temperature starting from absolute zero (-273.15°C). Used in science and physics.
Is it free?+
Yes, 100% free, no signup.