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Home » Math & Conversions » Unit Conversions » Celsius to Kelvin (°C to K) Converter Celsius to Kelvin (°C to K) Converter A complete temperature conversion tool. Enter a value in any field to instantly convert between **Celsius (°C)**, **Kelvin (K)**, and **Fahrenheit (°F)**. Celsius (°C) Kelvin (K) Fahrenheit (°F) Calculation Steps: Enter a value to see the step-by-step conversion. How to Convert Celsius to Kelvin The conversion from Celsius (°C) to Kelvin (K) is the simplest temperature conversion because the *size* of one degree Celsius is identical to the size of one Kelvin. The only difference is their "zero" point. The Formula (Celsius to Kelvin) To convert from Celsius to Kelvin, you simply add 273.15. K = °C + 273.15 Example: Convert 100°C (the boiling point of water) to Kelvin. 100 °C + 273.15 = 373.15 K The Formula (Kelvin to Celsius) To convert from Kelvin to Celsius, you subtract 273.15. °C = K - 273.15 What is Absolute Zero? The Kelvin scale is an "absolute" scale, meaning its zero point (0 K) is **Absolute Zero**. This is the theoretical temperature at which all atomic and molecular motion ceases. There is no temperature colder than 0 K, which is why the Kelvin scale has no negative numbers. Celsius and Fahrenheit are "relative" scales, as their zero points (0°C and 0°F) were set for convenience (e.g., the freezing point of water). Key Temperature Points Point Celsius (°C) Kelvin (K) Fahrenheit (°F) Water Boils 100 °C 373.15 K 212 °F Human Body (Avg) 37 °C 310.15 K 98.6 °F Room Temperature 20-25 °C ~293-298 K 68-77 °F Water Freezes 0 °C 273.15 K 32 °F Absolute Zero -273.15 °C 0 K -459.67 °F Frequently Asked Questions (FAQ) What is the formula for Celsius (°C) to Kelvin (K)? The formula is: Kelvin = Celsius + 273.15 . (K = °C + 273.15). What is 0 Celsius in Kelvin? 0 °C (the freezing point of water) is equal to 273.15 K . What is 0 Kelvin in Celsius? 0 Kelvin (K) is equal to -273.15 °C . This is known as Absolute Zero. Related Calculators Kelvin to Fahrenheit Converter Fahrenheit to Kelvin Converter Celsius to Fahrenheit Converter Fahrenheit to Celsius Converter BTU to kWh Converter Millimeters to Inches Converter Kilograms to Pounds Converter Centimeters to Inches Converter
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