How to Convert Celsius to Kelvin (°C to K)
Temperature conversions help with American oven recipes in Fahrenheit, weather apps set to the wrong unit, and science homework that uses kelvin. This guide shows how to convert celsius into kelvin by hand, with examples and a quick-reference table.
The conversion
Temperature scales have different zero points, so you cannot use a single multiplier. Convert through kelvin: °C converted through kelvin: ((°C+273.15)).
°C converted through kelvin: ((°C+273.15))
Worked examples
- 15 °C = 288.15 K
- 32 °C = 305.15 K
- 100 °C = 373.15 K
Celsius to Kelvin table
| Celsius | Kelvin |
|---|---|
| -40 °C | 233.15 K |
| -10 °C | 263.15 K |
| 0 °C | 273.15 K |
| 10 °C | 283.15 K |
| 20 °C | 293.15 K |
| 25 °C | 298.15 K |
| 30 °C | 303.15 K |
| 37 °C | 310.15 K |
| 50 °C | 323.15 K |
| 100 °C | 373.15 K |
| 200 °C | 473.15 K |
Common questions
Is °C to K exact?
The factors used here are the internationally defined values where they exist; results are rounded for display only.
How do I convert back?
Use the Kelvin to Celsius converter.
Mistakes to avoid
Rounding the factor too early
Using 3 instead of 3.28 for feet per metre introduces an error of almost 9% before you have started.
Forgetting squared and cubed units
Area and volume factors are the length factor squared or cubed, so 1 m² is about 10.76 sq ft, not 3.28.
Dropping the units
A bare number without a unit is easy to misread later. Always write the unit with the result.
Background
A conversion table is handy for common values, but a calculator is faster and avoids interpolation errors for anything in between.
Writing the units next to every number while you work is the simplest way to avoid mistakes. If the units do not cancel to leave the one you want, the calculation is set up wrongly.
Singapore adopted the metric system in the 1970s, replacing imperial units and traditional Chinese measures in most official uses. Metric units are now standard in schools, trade and government, but older units survive in property, markets and imported goods.
For any value, use the Celsius to Kelvin Converter or browse all temperature converters.
Run your own numbers: Celsius to Kelvin Converter