## Celsius to Kelvin (°C to K) conversion calculator

Kelvin to Celsius (K to °C) (Swap units)

20°C = 293.15K

Accuracy

Note: You can increase or decrease the accuracy of this answer by selecting the number of significant figures required from the options above the result.

### Celsius to Kelvin (°C to K) conversion formula

**Kelvin** = **Celsius** + 273.15

### Celsius to Kelvin calculation

**Kelvin** = **Celsius** + 273.15

**Kelvin** = 0 + 273.15

**Kelvin** = 273.15

## Converting from Celsius to Kelvin

Celsius to Kelvin conversions are easy as the degree interval between both scales are identical. To convert Celsius to Kelvin simply add 273.15 to the value.

For example, if you had a temperature of 25 degrees Celsius, add 273.15 to this as follows: 25 + 273.15 = 298.15K.

For every change of a degree Celsius, it is equivalent to a change of one degree in Kelvin.

## Why convert from Celsius to Kelvin?

Celsius is commonly used for everyday measurements whereas Kelvin is preferred for scientific calculations- the scales are essentially the same but start in a different place. The Kelvin scale is an absolute temperature scale that starts at absolute zero.

One of the reasons that you might want to convert from Celsius to Kelvin is to get rid of negative values. In the Celsius scale zero degrees represents the freezing point of water so everything below this has a negative value which can make certain calculations tricky. By converting to Kelvin you eliminate all negative values (as you cannot have a negative Kelvin temperature) which can make calculations easier.

Also, Kelvin is used extensively in science equations such as the ideal gas law and thermodynamics. Equations on this subject involve temperature differences or ratios and using Kelvin ensures that the calculations are consistent

## About the Celsius scale

Celsius is a unit of temperature also known as centigrade. It is named after the Swedish astronomer Anders Celsius who created the scale in 1742. The Celsius scale is the most commonly used temperature scale worldwide despite not being widespread in the US.

Celsius divides the range between the freezing and boiling points of water into 100 equal degrees. The freezing point of water is 0 degrees Celsius (0°C) and the boiling point of water is 100 degrees Celsius (100°C). This makes it convenient for measuring everyday temperatures.

Celsius is normally used in weather forecasts (apart from in the US), science and general temperature measurements. It provides a simple way to express temperature with positive values indicating temperatures above freezing and negative values for temperatures below freezing.

## About the Kelvin scale

Kelvin is based on Celsius but with a different starting point. It is an absolute scale meaning that it starts at absolute zero; the point at which all molecular motion ceases. The Celsius scale starts at the freezing point of water.

Each increment of the Kelvin scale is the same as a Celsius degree. The difference is the zero point; on the Kelvin scale is absolute zero which is equivalent to -273.15 degrees Celsius. This means that the Kelvin scale doesn't have negative values as all temperatures are measured relative to absolute zero.

The Kelvin scale is almost exclusively used in science such as physics and chemistry.

## What happens at absolute zero (0K)?

At absolute zero, 0 Kelvin (0K) or -273.15 degrees Celsius, the temperature is at the lowest possible point anything can possibly be. At this temperature the kinetic energy of atoms and molecules is zero causing them to come to a complete standstill. All molecular motion ceases and matter becomes still.

Several amazing phenomena occur here. As there is no molecular motion there is no heat energy and this has significant implications for the physical properties of the substance. For example, materials become very brittle and their electrical resistance becomes zero. Gases and liquids freeze into solids.

Scientists have never cooled anything down to absolute zero. However they have been able to see the effects of approaching absolute zero. This has provided insights into the behavior of matter and have led to the understanding of superconductors and Bose-Einstein condensates.

## Celsius to Kelvin table

Starting value

Increment

Accuracy

Celsius

Kelvin

0°C

273.15000K

1°C

274.15000K

2°C

275.15000K

3°C

276.15000K

4°C

277.15000K

5°C

278.15000K

6°C

279.15000K

7°C

280.15000K

8°C

281.15000K

10°C

283.15000K

11°C

284.15000K

12°C

285.15000K

13°C

286.15000K

14°C

287.15000K

15°C

288.15000K

16°C

289.15000K

17°C

290.15000K

18°C

291.15000K

19°C

292.15000K

Celsius

Kelvin

20°C

293.15000K

21°C

294.15000K

22°C

295.15000K

23°C

296.15000K

24°C

297.15000K

25°C

298.15000K

26°C

299.15000K

27°C

300.15000K

28°C

301.15000K

29°C

302.15000K

30°C

303.15000K

31°C

304.15000K

32°C

305.15000K

33°C

306.15000K

34°C

307.15000K

35°C

308.15000K

36°C

309.15000K

37°C

310.15000K

38°C

311.15000K

39°C

312.15000K

Celsius

Kelvin

40°C

313.15000K

41°C

314.15000K

42°C

315.15000K

43°C

316.15000K

44°C

317.15000K

45°C

318.15000K

46°C

319.15000K

47°C

320.15000K

48°C

321.15000K

49°C

322.15000K

50°C

323.15000K

51°C

324.15000K

52°C

325.15000K

53°C

326.15000K

54°C

327.15000K

55°C

328.15000K

56°C

329.15000K

57°C

330.15000K

58°C

331.15000K

59°C

332.15000K

Celsius

Kelvin

60°C

333.15000K

61°C

334.15000K

62°C

335.15000K

63°C

336.15000K

64°C

337.15000K

65°C

338.15000K

66°C

339.15000K

67°C

340.15000K

68°C

341.15000K

69°C

342.15000K

70°C

343.15000K

71°C

344.15000K

72°C

345.15000K

73°C

346.15000K

74°C

347.15000K

75°C

348.15000K

76°C

349.15000K

77°C

350.15000K

78°C

351.15000K

79°C

352.15000K

## Popular links

- Celsius to Fahrenheit
- Fahrenheit to Celsius
- Celsius to Kelvin (°C to K)
- Kelvin to Celsius (K to °C)
- Fahrenheit to Kelvin
- Kelvin to Fahrenheit