Home › Unit Converters › Celsius to Kelvin Converter

Celsius to Kelvin Converter

Enter any number of degrees Celsius and the kelvins appear as you type. Press ⇄ to swap the direction, and see the step-by-step math under the result.

CelsiusFrom

°C

KelvinTo

Decimal places

Step-by-step calculation

How to use the Celsius to Kelvin Converter

Type a value in the Celsius box. The kelvin result appears instantly.
Going the other way? Type in the Kelvin box, or press the ⇄ swap button.
Set the precision with the decimal places menu.
Check the working in the step-by-step box, then press Copy result or click any row in the tables below.

Celsius to kelvin formula

K = °C + 273.15

Take the temperature in degrees Celsius.
Add 273.15. The result is in kelvins.

Example: 25 °C + 273.15 = 298.15 K.

Reverse formula: °C = K − 273.15. Example: 300 K − 273.15 = 26.85 °C.

A change of 1 °C is exactly a change of 1 K, so temperature differences are the same number in both scales.

°C to K conversion table (1–100)

Click any row to load it into the converter.

Celsius to kelvin

Celsius	Kelvin
1 °C	274.15 K
2 °C	275.15 K
3 °C	276.15 K
4 °C	277.15 K
5 °C	278.15 K
6 °C	279.15 K
7 °C	280.15 K
8 °C	281.15 K
9 °C	282.15 K
10 °C	283.15 K
11 °C	284.15 K
12 °C	285.15 K
13 °C	286.15 K
14 °C	287.15 K
15 °C	288.15 K
16 °C	289.15 K
17 °C	290.15 K
18 °C	291.15 K
19 °C	292.15 K
20 °C	293.15 K
21 °C	294.15 K
22 °C	295.15 K
23 °C	296.15 K
24 °C	297.15 K
25 °C	298.15 K
26 °C	299.15 K
27 °C	300.15 K
28 °C	301.15 K
29 °C	302.15 K
30 °C	303.15 K
31 °C	304.15 K
32 °C	305.15 K
33 °C	306.15 K
34 °C	307.15 K
35 °C	308.15 K
36 °C	309.15 K
37 °C	310.15 K
38 °C	311.15 K
39 °C	312.15 K
40 °C	313.15 K
41 °C	314.15 K
42 °C	315.15 K
43 °C	316.15 K
44 °C	317.15 K
45 °C	318.15 K
46 °C	319.15 K
47 °C	320.15 K
48 °C	321.15 K
49 °C	322.15 K
50 °C	323.15 K
51 °C	324.15 K
52 °C	325.15 K
53 °C	326.15 K
54 °C	327.15 K
55 °C	328.15 K
56 °C	329.15 K
57 °C	330.15 K
58 °C	331.15 K
59 °C	332.15 K
60 °C	333.15 K
61 °C	334.15 K
62 °C	335.15 K
63 °C	336.15 K
64 °C	337.15 K
65 °C	338.15 K
66 °C	339.15 K
67 °C	340.15 K
68 °C	341.15 K
69 °C	342.15 K
70 °C	343.15 K
71 °C	344.15 K
72 °C	345.15 K
73 °C	346.15 K
74 °C	347.15 K
75 °C	348.15 K
76 °C	349.15 K
77 °C	350.15 K
78 °C	351.15 K
79 °C	352.15 K
80 °C	353.15 K
81 °C	354.15 K
82 °C	355.15 K
83 °C	356.15 K
84 °C	357.15 K
85 °C	358.15 K
86 °C	359.15 K
87 °C	360.15 K
88 °C	361.15 K
89 °C	362.15 K
90 °C	363.15 K
91 °C	364.15 K
92 °C	365.15 K
93 °C	366.15 K
94 °C	367.15 K
95 °C	368.15 K
96 °C	369.15 K
97 °C	370.15 K
98 °C	371.15 K
99 °C	372.15 K
100 °C	373.15 K

Kelvin to celsius

Kelvin	Celsius
1 K	-272.15 °C
2 K	-271.15 °C
3 K	-270.15 °C
4 K	-269.15 °C
5 K	-268.15 °C
6 K	-267.15 °C
7 K	-266.15 °C
8 K	-265.15 °C
9 K	-264.15 °C
10 K	-263.15 °C
11 K	-262.15 °C
12 K	-261.15 °C
13 K	-260.15 °C
14 K	-259.15 °C
15 K	-258.15 °C
16 K	-257.15 °C
17 K	-256.15 °C
18 K	-255.15 °C
19 K	-254.15 °C
20 K	-253.15 °C
21 K	-252.15 °C
22 K	-251.15 °C
23 K	-250.15 °C
24 K	-249.15 °C
25 K	-248.15 °C
26 K	-247.15 °C
27 K	-246.15 °C
28 K	-245.15 °C
29 K	-244.15 °C
30 K	-243.15 °C
31 K	-242.15 °C
32 K	-241.15 °C
33 K	-240.15 °C
34 K	-239.15 °C
35 K	-238.15 °C
36 K	-237.15 °C
37 K	-236.15 °C
38 K	-235.15 °C
39 K	-234.15 °C
40 K	-233.15 °C
41 K	-232.15 °C
42 K	-231.15 °C
43 K	-230.15 °C
44 K	-229.15 °C
45 K	-228.15 °C
46 K	-227.15 °C
47 K	-226.15 °C
48 K	-225.15 °C
49 K	-224.15 °C
50 K	-223.15 °C
51 K	-222.15 °C
52 K	-221.15 °C
53 K	-220.15 °C
54 K	-219.15 °C
55 K	-218.15 °C
56 K	-217.15 °C
57 K	-216.15 °C
58 K	-215.15 °C
59 K	-214.15 °C
60 K	-213.15 °C
61 K	-212.15 °C
62 K	-211.15 °C
63 K	-210.15 °C
64 K	-209.15 °C
65 K	-208.15 °C
66 K	-207.15 °C
67 K	-206.15 °C
68 K	-205.15 °C
69 K	-204.15 °C
70 K	-203.15 °C
71 K	-202.15 °C
72 K	-201.15 °C
73 K	-200.15 °C
74 K	-199.15 °C
75 K	-198.15 °C
76 K	-197.15 °C
77 K	-196.15 °C
78 K	-195.15 °C
79 K	-194.15 °C
80 K	-193.15 °C
81 K	-192.15 °C
82 K	-191.15 °C
83 K	-190.15 °C
84 K	-189.15 °C
85 K	-188.15 °C
86 K	-187.15 °C
87 K	-186.15 °C
88 K	-185.15 °C
89 K	-184.15 °C
90 K	-183.15 °C
91 K	-182.15 °C
92 K	-181.15 °C
93 K	-180.15 °C
94 K	-179.15 °C
95 K	-178.15 °C
96 K	-177.15 °C
97 K	-176.15 °C
98 K	-175.15 °C
99 K	-174.15 °C
100 K	-173.15 °C

Common values

Celsius	Kelvin	Example
-273.15 °C	0 K	Absolute zero
-40 °C	233.15 K	−40 °C = −40 °F
-18 °C	255.15 K	Freezer
0 °C	273.15 K	Water freezes
4 °C	277.15 K	Fridge
20 °C	293.15 K	Room temperature
25 °C	298.15 K	Standard lab temperature
37 °C	310.15 K	Body temperature
100 °C	373.15 K	Water boils (sea level)
180 °C	453.15 K	Moderate oven
1,000 °C	1,273.15 K	1,000 °C

About celsius and kelvin

Celsius (°C). The Celsius scale sets 0 °C at the freezing point and 100 °C at the boiling point of water at sea level. One Celsius degree is the same size as one kelvin.

Kelvin (K). The kelvin is the SI unit of temperature. It starts at absolute zero (0 K = −273.15 °C), so it never goes negative and has no degree sign.

Frequently asked questions

How do you convert Celsius to Kelvin?

Add 273.15 to the Celsius temperature. For example, 25 °C + 273.15 = 298.15 K.

Is a kelvin the same size as a degree Celsius?

Yes. Both scales have the same step size, so a rise of 10 °C is a rise of 10 K. Only the starting point differs: 0 K is absolute zero, −273.15 °C.

Why don't we say 'degrees Kelvin'?

Since 1967 the unit is simply the kelvin (symbol K, no degree sign), because it is an absolute scale rather than a relative one.

What is 20 degrees Celsius in kelvins?

20 °C is 293.15 K (room temperature).

How much is 180 degrees Celsius in kelvins?

180 degrees Celsius equals 453.15 kelvins.

Is this converter free and private?

Yes. It is free with no sign-up, and every calculation runs in your browser, so nothing you type is sent to a server.

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