Single Conversion
K = °C + 273.15. Values below -273.15°C are invalid physically.
Batch Conversion
| # | Celsius (°C) | Kelvin (K) | Actions |
|---|
Example Data
Common checkpoints for quick verification.
| Celsius (°C) | Kelvin (K) | Notes |
|---|---|---|
| -273.15 | 0.00 | Absolute zero |
| -40 | 233.15 | Celsius equals Fahrenheit |
| 0 | 273.15 | Water freezing point |
| 25 | 298.15 | Room temperature |
| 100 | 373.15 | Water boiling point |
Formula Used
The Kelvin scale is absolute, offset from Celsius by 273.15. The linear relation is:
K = °C + 273.15
- Zero Kelvin is absolute zero, the theoretical minimum thermal energy.
- One Kelvin step equals one degree step on the Celsius scale.
- Real measurements should consider sensor resolution and rounding policy.
How to Use This Calculator
- For a quick conversion, enter a Celsius value and click Convert. Adjust decimal precision if needed.
- For multiple values, use Batch Conversion. Add rows, enter Celsius values, then click Compute all.
- Download your results using the CSV or PDF buttons for recordkeeping.
- Use the example dataset to test and verify expected outputs.
Example of Using the Celsius to Kelvin Converter
Goal: Convert 36.6 °C to Kelvin with two decimals.
- Enter 36.6 in the Celsius input.
- Select decimal precision 2.
- Click Convert to compute the result.
- Computation:
K = 36.6 + 273.15 = 309.75K.
| Celsius (°C) | + 273.15 | Kelvin (K) |
|---|---|---|
| 36.6 | 273.15 | 309.75 |
Tip: adjust precision to see rounding effects clearly.
Frequently Asked Questions
What formula does this converter use?
It uses a simple linear offset: K = °C + 273.15. The Kelvin scale shares the same step size as Celsius, differing only by the fixed offset 273.15. The relation is independent of pressure for ordinary conversions.
Can Kelvin be negative?
No. Kelvin is an absolute thermodynamic scale starting at 0 K (absolute zero), which equals −273.15 °C. Inputs below −273.15 °C are physically invalid and should be treated as errors or measurement artifacts.
How precise are the results?
You can select 0–6 decimal places. Internally, calculations use floating‑point arithmetic, then round to your chosen precision. For formal reporting, match the decimal places to your instrument’s resolution or stated uncertainty.
How do I convert many values quickly?
Use the Batch Conversion table. Click “Add row,” enter Celsius values, then “Compute all.” Precision follows the Single Conversion selector. Export your table using the dedicated CSV or PDF buttons when you are done.
Why use Kelvin instead of Celsius?
Kelvin measures absolute temperature, directly tied to thermal energy. Many scientific equations require absolute temperature, including the ideal gas law and Arrhenius rate expressions. Using Kelvin avoids negative values and simplifies proportional relationships.
How can I check if my result seems reasonable?
Remember reference points: 0 °C = 273.15 K, 25 °C ≈ 298.15 K, 100 °C = 373.15 K. Differences stay identical: a 10 °C increase equals a 10 K increase. Compare with the included example dataset to verify.
How do I export and use my data?
“Download CSV” saves comma‑separated values with headers for easy spreadsheets. “Download PDF” creates a formatted report with a timestamped title. Store results with project notes for reproducibility and consistent documentation.