Free temperature converter for Celsius, Fahrenheit, and Kelvin. Instantly convert between all temperature scales with accurate results.
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Traveling abroad? Cooking an international recipe? Working on a science project? Our temperature converter instantly translates between Celsius, Fahrenheit, and Kelvin so you always know exactly how hot or cold things are, no matter which scale you encounter.
Temperature measures the average kinetic energy of particles in a substance. Three scales are commonly used: Celsius (water freezes at 0°, boils at 100°), Fahrenheit (water freezes at 32°, boils at 212°), and Kelvin (absolute zero at 0K, no negative values). Celsius is used globally for everyday purposes, Fahrenheit in the US, and Kelvin in scientific contexts. Each scale has its own practical applications and historical origins.
Key Conversions
°F = (°C × 9/5) + 32 | K = °C + 273.15Convert freely between Celsius, Fahrenheit, and Kelvin in any direction.
Get exact conversions to multiple decimal places for scientific accuracy.
No need to memorize formulas—get answers immediately as you type.
Convert oven temperatures between Celsius and Fahrenheit for international recipes.
Interpret weather forecasts when traveling to countries using different temperature scales.
Convert between Kelvin and other scales for physics and chemistry calculations.
Understand body temperatures reported in different scales (fever thresholds, etc.).
Fahrenheit was the standard when America gained independence, and switching systems is costly and complex. Interestingly, Fahrenheit's 0° was the coldest temperature he could create (salt and ice mixture), and 100° was meant to be human body temperature (though he measured slightly off).