Temperature Converter
Convert between °C, °F, and K instantly. Edit any field — the others update live.
°C
°F
K
Quick reference
How the Temperature Converter Works
Type any temperature in Celsius, Fahrenheit, or Kelvin — the other two fields update instantly. The converter uses the standard conversion formulas: °F = °C × 9/5 + 32, and K = °C + 273.15. Kelvin is the SI base unit of temperature used in science; 0 K is absolute zero, the coldest possible temperature.
Click any row in the quick reference table to load those values instantly.
Frequently Asked Questions
What is the formula to convert Celsius to Fahrenheit?
Multiply by 9, divide by 5, then add 32: °F = (°C × 9/5) + 32. For a quick mental estimate, double the Celsius value and add 30 — it is off by a few degrees but fast.
What is absolute zero?
Absolute zero is 0 Kelvin (−273.15 °C / −459.67 °F), the lowest temperature theoretically possible. At this point, particles have minimum thermal motion. It has never been perfectly reached in a lab, though scientists have gotten within billionths of a degree.
At what temperature does Celsius equal Fahrenheit?
Celsius and Fahrenheit meet at −40°. Both scales read −40 at that point, which is useful to know for extremely cold weather contexts.
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