What is 0 degrees Celsius in kelvin?
0 °C equals 273.15 K.
Convert Celsius (°C) to Kelvin (K) instantly.
Formula
value + 273.15
| Sample | Converted |
|---|---|
| -40 °C | 233.15 K |
| 0 °C | 273.15 K |
| 25 °C | 298.15 K |
| 100 °C | 373.15 K |
| 300 °C | 573.15 K |
Convert Celsius to Kelvin when a metric temperature needs to be used in scientific formulas, thermodynamics, chemistry, physics, or engineering calculations.
Celsius is convenient for everyday metric temperatures, while kelvin is the absolute temperature scale used in science.
The conversion is a direct offset because Celsius and kelvin have the same interval size.
A value of -273.15 °C equals 0 K, known as absolute zero.
Use kelvin when a formula depends on absolute temperature rather than relative comfort or weather values.
Use Celsius when communicating everyday temperatures, lab setpoints, or metric temperature readings.
Do not use negative kelvin values for physical temperatures; kelvin starts at absolute zero.
Kelvin starts at absolute zero, the theoretical point where thermal motion is minimized.
Celsius starts from a water-based reference point.
Adding 273.15 moves a Celsius value onto the absolute kelvin scale.
Gas laws, thermodynamics, radiation formulas, and many material equations require kelvin.
Using Celsius directly in those formulas can produce incorrect results.
Convert to kelvin before performing calculations that depend on absolute temperature.
A change of 1 °C is the same size as a change of 1 K.
That makes Celsius-to-kelvin conversion an offset rather than a scaling operation.
Temperature differences can be compared directly, but absolute temperatures need the 273.15 shift.
Definition: Celsius is a temperature scale where water freezes at 0 °C and boils at 100 °C under standard atmospheric pressure.
History/Origin: Celsius became the standard metric temperature scale for science, weather, medicine, and daily use in most countries.
Current use: Celsius is used in weather reports, medicine, cooking, laboratories, engineering specifications, and everyday metric temperature readings.
Definition: Kelvin is the SI base unit of thermodynamic temperature, starting at absolute zero.
History/Origin: The kelvin scale is named after Lord Kelvin and was developed to provide an absolute temperature scale for scientific work.
Current use: Kelvin is used in physics, chemistry, thermodynamics, astronomy, engineering, material science, gas laws, and heat-transfer calculations.
| Celsius [°C] | Kelvin [K] |
|---|---|
| -40 °C | 233.15 K |
| 0 °C | 273.15 K |
| 10 °C | 283.15 K |
| 25 °C | 298.15 K |
| 37 °C | 310.15 K |
| 100 °C | 373.15 K |
1 °C = 274.15 K
1 K = -272.15 °C
Formula: value + 273.15
Example: 25 °C = 298.15 K
Precision note: Use Kelvin = Celsius + 273.15. Celsius and kelvin have the same temperature interval size, so only the zero point changes.
0 °C equals 273.15 K.
25 °C equals 298.15 K.
No. The unit is written K, not °K.