🌡️ Celsius to Kelvin Calculator
Convert Celsius to Kelvin instantly with the formula K = °C + 273.15. Includes common temperature references, reverse conversion, and step-by-step breakdown.
What Is the Celsius to Kelvin Conversion?
The Celsius to Kelvin conversion is a simple temperature conversion used in science and engineering. The Kelvin scale is the SI base unit for temperature, and it uses the same incremental scale as Celsius , meaning a change of 1 °C equals a change of 1 K.
The conversion formula is:
K = °C + 273.15
Key points:
- Absolute Zero: 0 K = -273.15 °C , the lowest possible temperature.
- Water Freezes: 273.15 K = 0 °C.
- Water Boils: 373.15 K = 100 °C.
- No Degree Symbol: Kelvin is written as "K" (e.g., 298.15 K), not "°K".
How Does the Celsius to Kelvin Calculator Work?
The calculator performs the following steps:
- Takes your Celsius input , any valid temperature (minimum -273.15).
- Applies the formula , K = °C + 273.15.
- Displays the result , with your chosen decimal precision.
- Shows a step-by-step breakdown , see exactly how the calculation is done.
- Provides reverse conversion , convert Kelvin back to Celsius.
- Visual chart , compare Celsius and Kelvin temperatures side by side.
Why Use This Celsius to Kelvin Calculator?
- Instant Results: Convert any Celsius temperature to Kelvin in seconds.
- Step-by-Step: See the exact calculation with a clear breakdown.
- Reverse Conversion: Easily convert Kelvin back to Celsius.
- Visual Chart: See the temperature comparison at a glance.
- Common References: Quick reference for water freezing, boiling, and absolute zero.
- Free & Private: No registration, no data storage , all calculations are done in your browser.
❓ Celsius to Kelvin Conversion FAQ
What is the formula to convert Celsius to Kelvin?
The formula is K = °C + 273.15. Add 273.15 to your Celsius temperature to get Kelvin.
What is 0°C in Kelvin?
0°C = 273.15 K. This is the freezing point of water.
What is 100°C in Kelvin?
100°C = 373.15 K. This is the boiling point of water.
What is absolute zero in Celsius and Kelvin?
Absolute zero is -273.15°C or 0 K. It is the lowest possible temperature.
What is the difference between Celsius and Kelvin?
The Celsius scale is based on the freezing (0°C) and boiling (100°C) points of water. The Kelvin scale uses the same degree size but starts at absolute zero (0 K). A change of 1 °C equals a change of 1 K.
Do I use a degree symbol with Kelvin?
No. Kelvin is written without a degree symbol. For example, "298.15 K" is correct, not "298.15 °K".
Can I convert negative Celsius temperatures to Kelvin?
Yes. Any Celsius temperature above -273.15 can be converted to Kelvin. For example, -10°C = 263.15 K. The result will always be a positive number (or zero at absolute zero).
How accurate is this calculator?
This calculator provides accurate conversions using the standard formula K = °C + 273.15. You can adjust the decimal precision to suit your needs.
Is this calculator free to use?
Yes, this calculator is completely free to use. No registration or personal data storage is required. All calculations are performed in your browser.
Why is 273.15 used instead of 273?
The value 273.15 is used because it's the exact difference between the Celsius and Kelvin scales. Using 273.15 provides more precise scientific conversions. Some simplified conversions use 273, but 273.15 is the standard scientific value.