Convert 25°C to Kelvin
Temperature converter
25°C equals
298.15 K
Warm: Pleasant summer weather
How to convert 25°C to K
Follow these steps to check the answer yourself.
- 1
Write the conversion formula
Kelvin is Celsius shifted by 273.15.
K = °C + 273.15
- 2
Substitute the Celsius value
Replace °C with 25.
K = 25 + 273.15
- 3
Add 273.15
This gives the temperature in kelvin.
25 + 273.15 = 298.15
Answer: 25°C = 298.15 K
25°C and nearby temperatures
Celsius values from 20°C to 30°C converted to Kelvin and Fahrenheit. Linked values open their own conversion page.
Celsius to Kelvin conversion chart
Common temperatures from -40°C to 200°C. Bookmark or print this chart for quick reference.
| °C | K |
|---|---|
| -40°C | 233.15 K |
| -30°C | 243.15 K |
| -20°C | 253.15 K |
| -10°C | 263.15 K |
| -5°C | 268.15 K |
| 0°C | 273.15 K |
| 5°C | 278.15 K |
| 10°C | 283.15 K |
| °C | K |
|---|---|
| 15°C | 288.15 K |
| 20°C | 293.15 K |
| 25°C | 298.15 K |
| 30°C | 303.15 K |
| 35°C | 308.15 K |
| 37°C | 310.15 K |
| 40°C | 313.15 K |
| 45°C | 318.15 K |
| °C | K |
|---|---|
| 50°C | 323.15 K |
| 60°C | 333.15 K |
| 70°C | 343.15 K |
| 80°C | 353.15 K |
| 90°C | 363.15 K |
| 100°C | 373.15 K |
| 150°C | 423.15 K |
| 200°C | 473.15 K |
Is 25°C hot or cold?
25°C (298.15 K) reads as warm on the thermometer: pleasant summer weather. Typical context: warm summer weather.
25°C is 5°C warmer than typical room temperature (20°C), and 12°C cooler than average human body temperature (37°C). On the water scale it sits 25% of the way from freezing to boiling.
Quick mental math
To estimate Celsius to Kelvin in your head, add 273 to the Celsius value.
25 + 273 = 298 K (exact answer: 298.15 K)
Dropping the 0.15 is fine for everyday use, but keep it for lab and engineering work.
To go the other way, use the Kelvin converter: 298.15 K converts back to 25°C.
Frequently asked questions
What is 25°C in Kelvin?
25°C equals 298.15 K. This is calculated with the standard Celsius to Kelvin formula.
How do I convert 25 Celsius to Kelvin?
To convert Celsius to Kelvin, add 273.15. For 25°C the result is 298.15 K.
Is 25°C hot or cold?
25°C is warm - comfortable summer weather for most people.
What is the formula for Celsius to Kelvin conversion?
The formula is: K = °C + 273.15
Good to know
- Anders Celsius proposed his scale in 1742. It was originally inverted, with 0 for boiling water and 100 for freezing; the order was flipped soon after his death.
- The kelvin is the SI base unit of temperature. Since 2019 it has been defined by fixing the value of the Boltzmann constant, not by the properties of water.
- Kelvin is written without a degree sign: 300 K, not 300°K.
- A change of 1°C or 1 K equals a change of 1.8°F.
Sources
- SI Units – Temperature (NIST (US National Institute of Standards and Technology))
Conversion formulas between °C, °F and K, and the 273.15 offset.
- The kelvin (BIPM (International Bureau of Weights and Measures))
Definition of the kelvin and absolute zero.
Written and checked by Abdul Manan.
Last updated . Results are for general information; see the disclaimer.