Kelvin Converter
Convert between kelvin, Celsius and Fahrenheit in either direction. Pick the units with the buttons above each box; the kelvin charts are further down the page.
Temperature converter
How to convert 300 K to °C
Follow these steps to check the answer yourself.
- 1
Write the conversion formula
Celsius is kelvin shifted by 273.15.
°C = K − 273.15
- 2
Substitute the Kelvin value
Replace K with 300.
°C = 300 − 273.15
- 3
Subtract 273.15
This gives the temperature in Celsius.
300 − 273.15 = 26.85
Answer: 300 K = 26.85°C
Converting to and from kelvin
Kelvin and Celsius use degrees of the same size; only the starting point differs. So K = °C + 273.15 and °C = K − 273.15. For example, 25°C is 298.15 K, and 500 K is 226.85°C.
Fahrenheit takes one extra step, because its degrees are smaller. To go from °F to K, subtract 32, multiply by 5/9 and add 273.15: 98.6°F gives 310.15 K. To go the other way, subtract 273.15, multiply by 1.8 and add 32.
Why kelvin has no negative numbers
The scale starts at absolute zero (0 K, or −273.15°C), the point at which a substance has the least thermal energy it can have. Nothing can be colder, so a negative kelvin value is a sign of a typing or conversion error.
That fixed starting point is why physics and chemistry formulas use kelvin. In an ideal gas, doubling the temperature in kelvin doubles the average kinetic energy of its molecules; going from 10°C to 20°C does not. Write kelvin without the degree sign: 300 K, not 300°K.
Conversion formulas
Kelvin to Celsius
°C = K − 273.15
Celsius to Kelvin
K = °C + 273.15
Kelvin to Fahrenheit
°F = (K − 273.15) × 9/5 + 32
Fahrenheit to Kelvin
K = (°F − 32) × 5/9 + 273.15
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.
Kelvin conversion charts
Kelvin against Celsius and Fahrenheit, from absolute zero upward. Select a value for its worked conversion.
Kelvin to Celsius and Fahrenheit: 0 K to 500 K
Scientific data is usually reported in kelvin. The first row is absolute zero; around 293 K to 298 K is ordinary room temperature.
| Kelvin (K) | Celsius (°C) | Fahrenheit (°F) |
|---|---|---|
| 0 K | -273.15 °C | -459.67 °F |
| 10 K | -263.15 °C | -441.67 °F |
| 20 K | -253.15 °C | -423.67 °F |
| 30 K | -243.15 °C | -405.67 °F |
| 40 K | -233.15 °C | -387.67 °F |
| 50 K | -223.15 °C | -369.67 °F |
| 60 K | -213.15 °C | -351.67 °F |
| 70 K | -203.15 °C | -333.67 °F |
| 80 K | -193.15 °C | -315.67 °F |
| 90 K | -183.15 °C | -297.67 °F |
| 100 K | -173.15 °C | -279.67 °F |
| 110 K | -163.15 °C | -261.67 °F |
| 120 K | -153.15 °C | -243.67 °F |
| 130 K | -143.15 °C | -225.67 °F |
| 140 K | -133.15 °C | -207.67 °F |
| 150 K | -123.15 °C | -189.67 °F |
| 160 K | -113.15 °C | -171.67 °F |
| 170 K | -103.15 °C | -153.67 °F |
| 180 K | -93.15 °C | -135.67 °F |
| 190 K | -83.15 °C | -117.67 °F |
| 200 K | -73.15 °C | -99.67 °F |
| 210 K | -63.15 °C | -81.67 °F |
| 220 K | -53.15 °C | -63.67 °F |
| 230 K | -43.15 °C | -45.67 °F |
| 240 K | -33.15 °C | -27.67 °F |
| 250 K | -23.15 °C | -9.67 °F |
| 260 K | -13.15 °C | 8.33 °F |
| 270 K | -3.15 °C | 26.33 °F |
| 280 K | 6.85 °C | 44.33 °F |
| 290 K | 16.85 °C | 62.33 °F |
| 300 K | 26.85 °C | 80.33 °F |
| 310 K | 36.85 °C | 98.33 °F |
| 320 K | 46.85 °C | 116.33 °F |
| 330 K | 56.85 °C | 134.33 °F |
| 340 K | 66.85 °C | 152.33 °F |
| 350 K | 76.85 °C | 170.33 °F |
| 360 K | 86.85 °C | 188.33 °F |
| 370 K | 96.85 °C | 206.33 °F |
| 380 K | 106.85 °C | 224.33 °F |
| 390 K | 116.85 °C | 242.33 °F |
| 400 K | 126.85 °C | 260.33 °F |
| 410 K | 136.85 °C | 278.33 °F |
| 420 K | 146.85 °C | 296.33 °F |
| 430 K | 156.85 °C | 314.33 °F |
| 440 K | 166.85 °C | 332.33 °F |
| 450 K | 176.85 °C | 350.33 °F |
| 460 K | 186.85 °C | 368.33 °F |
| 470 K | 196.85 °C | 386.33 °F |
| 480 K | 206.85 °C | 404.33 °F |
| 490 K | 216.85 °C | 422.33 °F |
| 500 K | 226.85 °C | 440.33 °F |
Celsius to Kelvin: −270°C to 300°C
Add 273.15 to any Celsius value to get kelvin. One kelvin and one degree Celsius are the same size, so only the starting point differs.
| Celsius (°C) | Kelvin (K) |
|---|---|
| -273.15 °C | 0 K |
| -270 °C | 3.15 K |
| -260 °C | 13.15 K |
| -250 °C | 23.15 K |
| -240 °C | 33.15 K |
| -230 °C | 43.15 K |
| -220 °C | 53.15 K |
| -210 °C | 63.15 K |
| -200 °C | 73.15 K |
| -190 °C | 83.15 K |
| -180 °C | 93.15 K |
| -170 °C | 103.15 K |
| -160 °C | 113.15 K |
| -150 °C | 123.15 K |
| -140 °C | 133.15 K |
| -130 °C | 143.15 K |
| -120 °C | 153.15 K |
| -110 °C | 163.15 K |
| -100 °C | 173.15 K |
| -90 °C | 183.15 K |
| -80 °C | 193.15 K |
| -70 °C | 203.15 K |
| -60 °C | 213.15 K |
| -50 °C | 223.15 K |
| -40 °C | 233.15 K |
| -30 °C | 243.15 K |
| -20 °C | 253.15 K |
| -10 °C | 263.15 K |
| 0 °C | 273.15 K |
| 10 °C | 283.15 K |
| 20 °C | 293.15 K |
| 30 °C | 303.15 K |
| 40 °C | 313.15 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 |
| 110 °C | 383.15 K |
| 120 °C | 393.15 K |
| 130 °C | 403.15 K |
| 140 °C | 413.15 K |
| 150 °C | 423.15 K |
| 160 °C | 433.15 K |
| 170 °C | 443.15 K |
| 180 °C | 453.15 K |
| 190 °C | 463.15 K |
| 200 °C | 473.15 K |
| 210 °C | 483.15 K |
| 220 °C | 493.15 K |
| 230 °C | 503.15 K |
| 240 °C | 513.15 K |
| 250 °C | 523.15 K |
| 260 °C | 533.15 K |
| 270 °C | 543.15 K |
| 280 °C | 553.15 K |
| 290 °C | 563.15 K |
| 300 °C | 573.15 K |
Fahrenheit to Kelvin: −459.67°F to 500°F
Useful when engineering or lab data mixes US and SI units. Values are shown in steps of 20°F.
| Fahrenheit (°F) | Kelvin (K) |
|---|---|
| -459.67 °F | 0 K |
| -440 °F | 10.93 K |
| -420 °F | 22.04 K |
| -400 °F | 33.15 K |
| -380 °F | 44.26 K |
| -360 °F | 55.37 K |
| -340 °F | 66.48 K |
| -320 °F | 77.59 K |
| -300 °F | 88.71 K |
| -280 °F | 99.82 K |
| -260 °F | 110.93 K |
| -240 °F | 122.04 K |
| -220 °F | 133.15 K |
| -200 °F | 144.26 K |
| -180 °F | 155.37 K |
| -160 °F | 166.48 K |
| -140 °F | 177.59 K |
| -120 °F | 188.71 K |
| -100 °F | 199.82 K |
| -80 °F | 210.93 K |
| -60 °F | 222.04 K |
| -40 °F | 233.15 K |
| -20 °F | 244.26 K |
| 0 °F | 255.37 K |
| 20 °F | 266.48 K |
| 40 °F | 277.59 K |
| 60 °F | 288.71 K |
| 80 °F | 299.82 K |
| 100 °F | 310.93 K |
| 120 °F | 322.04 K |
| 140 °F | 333.15 K |
| 160 °F | 344.26 K |
| 180 °F | 355.37 K |
| 200 °F | 366.48 K |
| 220 °F | 377.59 K |
| 240 °F | 388.71 K |
| 260 °F | 399.82 K |
| 280 °F | 410.93 K |
| 300 °F | 422.04 K |
| 320 °F | 433.15 K |
| 340 °F | 444.26 K |
| 360 °F | 455.37 K |
| 380 °F | 466.48 K |
| 400 °F | 477.59 K |
| 420 °F | 488.71 K |
| 440 °F | 499.82 K |
| 460 °F | 510.93 K |
| 480 °F | 522.04 K |
| 500 °F | 533.15 K |
Popular conversions
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