Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin instantly.
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How to use Temperature Converter
- Enter a temperature value.
- Choose the scale you're converting from and the scale you're converting to.
- The converted value updates instantly.
About this tool
The Temperature Converter converts between Celsius, Fahrenheit, and Kelvin. Unlike length or weight, temperature scales aren't simple ratios of each other — they're offset (e.g. 0°C = 32°F, not 0°F), so this tool uses the exact conversion formulas rather than a multiplier. All calculations run instantly in your browser — nothing is uploaded or sent to a server.
Frequently Asked Questions
What is the formula to convert Celsius to Fahrenheit?
°F = (°C × 9/5) + 32. For example, 20°C equals 68°F.
What is the formula to convert Fahrenheit to Celsius?
°C = (°F − 32) × 5/9. For example, 68°F equals 20°C.
What is absolute zero?
Absolute zero is 0 Kelvin, equal to −273.15°C or −459.67°F — the coldest theoretically possible temperature, where all thermal motion stops.