Celsius to Kelvin Converter
Convert °C to K
Enter a temperature in Celsius, and this tool will instantly convert it into Kelvin.
Kelvin is the base unit of temperature in the International System of Units (SI). Whether you're solving a chemistry problem, studying physics, or working in engineering, this calculator ensures absolute precision.
How to Use this Converter
Using the converter is simple:
- Standard Input: Enter a temperature in Celsius (e.g., 25).
- Reverse Calculation: Type a temperature in Kelvin to see the Celsius equivalent.
- Quick Select: Check the box to pick from common scientific constants like Absolute Zero or STP.
The converter automatically calculates the exact temperature instantly.
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Celsius to Kelvin Formula
The Kelvin scale is an absolute temperature scale, meaning 0 K is Absolute Zero (the lowest possible temperature). To convert Celsius to Kelvin, you simply add exactly 273.15 to the Celsius temperature.
K = °C + 273.15
Conversely, to calculate Celsius from Kelvin, simply subtract 273.15 from the Kelvin temperature.
°C = K - 273.15
Example
If a chemical reaction takes place at 25°C:
25 + 273.15 = 298.15 K
Therefore, 25°C is exactly 298.15 K.
Common Use Cases & Examples
People frequently need to convert Celsius to Kelvin in scientific and academic fields. Here are some common examples:
| Use Case | Example Search | Why Users Need It | Result (K) |
|---|---|---|---|
| Chemistry Labs | 0 c to k | Calculating Standard Temperature & Pressure (STP) | 273.15 K |
| Physics Problems | 25 c to k | Standard ambient temperature for equations | 298.15 K |
| Thermodynamics | 100 c to k | Calculating energy at the boiling point of water | 373.15 K |
| Astronomy | -270 c to k | Estimating the ambient temperature of deep space | 3.15 K |
| Cryogenics | -196 c to k | Working with liquid nitrogen | 77.15 K |
| Material Science | 1000 c to k | Measuring extreme forging temperatures | 1273.15 K |
Common Temperature Conversions
Here is a quick reference table for everyday and scientific temperature conversions:
| Description | Celsius (°C) | Kelvin (K) |
|---|---|---|
| Absolute Zero | -273.15 °C | 0 K |
| Deep Space | -270 °C | 3.15 K |
| Liquid Nitrogen (Boiling) | -196 °C | 77.15 K |
| Water Freezing Point / STP | 0 °C | 273.15 K |
| Room Temperature | 20 °C | 293.15 K |
| Standard Ambient Temp (SATP) | 25 °C | 298.15 K |
| Normal Body Temp | 37 °C | 310.15 K |
| Water Boiling Point | 100 °C | 373.15 K |