Free online temperature converter - quickly convert Kelvin (K) to Celsius (°C) and Fahrenheit (°F). Supports bidirectional conversion. Pure client-side calculation, data never uploaded.
Zero dependencies · Works offline℃ = K - 273.15
℉ = (K - 273.15) × 9/5 + 32
Enter a Kelvin temperature value in the input field, click "Convert" to see the Celsius and Fahrenheit equivalents. Supports decimals and negative values. Click "Copy" to quickly copy results.
What is Kelvin?
Kelvin (K) is the base unit of temperature in the International System of Units (SI), named after British physicist William Thomson (Lord Kelvin). 0K (absolute zero) is the theoretical minimum temperature, equal to -273.15°C.
When to use Kelvin?
Kelvin is widely used in scientific research, physics and engineering, especially in thermodynamic calculations. In daily life, most countries use Celsius, while the United States uses Fahrenheit.