Celsius to Kelvin Converter for Canadian Students & Engineers

Convert Celsius to Kelvin in seconds with our free online tool — built for Canadian university coursework, lab work, and engineering calculations from coast to coast to coast.

Canadian Temperature Converter - Celsius & Fahrenheit

1 c = 274.15 k

The quick answer for 1 Celsius — type any value below for the exact result

Enter Celsius

Celsius

Result in Kelvin

Kelvin

Celsius to Kelvin Conversion Formula

K = °C + 273.15

Celsius and Kelvin Explained

Celsius (c)

The Celsius scale (symbol °C) measures temperature with water freezing at 0° and boiling at 100° at one standard atmosphere. Each Celsius degree is exactly the same interval as one kelvin, so the scale differs from Kelvin only by the fixed offset of 273.15. Everyday values run from -30° in a Winnipeg January to +30° during a Toronto heat wave, making Celsius the daily temperature language of Canada — and nearly every country outside the United States, where Fahrenheit forecasts still rule just across the border.

Where it is used: Canadian weather forecasts, kitchens, thermostats, and clinics; science courses also use it for everyday measurements before converting into SI units.

Origin: Swedish astronomer Anders Celsius proposed the scale in 1742 with 0° at boiling and 100° at freezing; it was reversed to the modern direction shortly after his death.

Kelvin (k)

The kelvin (symbol K, never °K) is the SI base unit of thermodynamic temperature, defined since 2019 by an exact value of the Boltzmann constant. Zero kelvin is absolute zero — the point of minimum thermal motion — and its degrees are the same size as Celsius degrees: water freezes at 273.15 K and boils at 373.15 K. The scale spans from millikelvin experiments in Canadian quantum research labs to stellar interiors at millions of kelvin.

Where it is used: Physics, chemistry, and engineering wherever absolute temperature matters: gas laws, radiation laws, cryogenics, astronomy, and materials science — the standard across Canadian universities and government research institutions.

Origin: William Thomson (Lord Kelvin) proposed an absolute temperature scale in 1848; the kelvin became an SI base unit in 1960 and dropped its degree sign in 1968.

Celsius to Kelvin Conversion Table

Celsius (c)	Kelvin (k)
-273.15 c	0 k
-196 c	77.15 k
-78.5 c	194.65 k
-40 c	233.15 k
-18 c	255.15 k
0 c	273.15 k
10 c	283.15 k
20 c	293.15 k
25 c	298.15 k
30 c	303.15 k
37 c	310.15 k
50 c	323.15 k
100 c	373.15 k
150 c	423.15 k
200 c	473.15 k
300 c	573.15 k
500 c	773.15 k
1000 c	1273.15 k
1538 c	1811.15 k

Kelvin to Celsius Conversion Table

Kelvin (k)	Celsius (c)
0 k	-273.15 c
4.2 k	-268.95 c
77 k	-196.15 c
194.65 k	-78.5 c
233.15 k	-40 c
273.15 k	0 c
288.15 k	15 c
293.15 k	20 c
298.15 k	25 c
300 k	26.85 c
310.15 k	37 c
373.15 k	100 c
1811 k	1537.85 c

Celsius to Kelvin in Everyday Objects

Common real-world examples that make Celsius and Kelvin easy to picture at a glance.

	Celsius (c)	Kelvin (k)
Water freezing point	0 c	273.15 k
Water boiling point	100 c	373.15 k
Standard lab temperature	25 c	298.15 k
Human body temperature	37 c	310.15 k
Dry ice sublimation	-78.5 c	194.65 k
Liquid nitrogen boiling	-196.15 c	77 k
Iron melting point	1538 c	1811.15 k
Absolute zero	-273.15 c	0 k

When You Need Celsius to Kelvin Conversions

Thermodynamics problem sets

Gas-law equations such as PV = nRT only accept absolute temperature. Typing 27°C gives 300.15 K instantly, and a chest freezer at the standard Canadian setting of -18°C becomes 255.15 K without touching a calculator.

Cryogenic storage and shipping

Dewar specs and cell-banking protocols quote temperatures in Kelvin — liquid nitrogen sits near 77 K, and the -80°C ultra-low freezers used in Canadian hospitals and vaccine cold chains hold 193.15 K — so converting Celsius readings keeps inventory logs consistent.

Reading phase diagrams

Metallurgy references plot melting curves in Kelvin: iron melts at 1811.15 K and aluminum at 933.15 K, while a Hamilton steel mill or a Saguenay smelter reports pyrometer readings in Celsius — this converter bridges the two instantly.

Writing lab reports in SI units

Canadian journals and university labs expect absolute temperatures: an experiment run at room conditions of 23°C is reported as 296.15 K, and a water bath held at 60°C as 333.15 K.

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How to Use

1

Enter the Temperature in Celsius

Type the Celsius value — for example, enter -20 for a January morning in Ottawa, or 27 for a standard gas-law problem
2

See the Kelvin Result

The absolute temperature appears instantly: -20°C = 253.15 K, exactly what you need to plug into PV = nRT
3

Copy or Swap

Copy the result into your lab report or click Swap to convert Kelvin back to Celsius
4

Check the Reference Table

Browse common anchors like 0°C = 273.15 K (water freezing on Canadian lakes) or 100°C = 373.15 K (water boils at sea level)

Why Use Be Converter?

Instant Absolute-Scale Conversion

Kelvin results appear in real time as you type — no more adding 273.15 by hand halfway through a thermodynamics assignment

Exact SI Definition

Uses the fixed offset K = °C + 273.15, so 0°C returns precisely 273.15 K — no rounding drift in lab reports for your chemistry or physics courses

Scientific Reference Table

Key anchors at a glance — absolute zero (-273.15°C = 0 K), liquid nitrogen (-196°C = 77.15 K), and a -30°C prairie cold snap (243.15 K)

Swap with One Click

Flip to Kelvin to Celsius instantly — handy when a journal quotes 298 K and your bench thermometer in the lab reads 24.85°C

Free & No Signup

Unlimited conversions for coursework at any Canadian college or university, lab notebooks, and research — always free, no account needed

Runs Locally

Every calculation happens right in your browser. No temperature data is sent to any server, in Canada or anywhere else

Frequently Asked Questions

What is the formula to convert Celsius to Kelvin?

The formula is K = °C + 273.15. Simply add 273.15 to the Celsius value. For example, 20°C + 273.15 = 293.15 K. There is no multiplication involved — the two scales use identical-sized degrees.

What is 0°C in Kelvin?

0°C equals 273.15 K. This is the freezing point of water at standard atmospheric pressure — Environment Canada's rain-versus-snow line — and one of the most-used reference points in science.

What is absolute zero on the Celsius scale?

Absolute zero is 0 K, which equals -273.15°C. It is the theoretical point where particles reach minimum thermal motion — no substance can be cooled below it, though cryogenics and quantum labs such as those in Waterloo get remarkably close.

What is 25°C in Kelvin?

25°C equals 298.15 K. This is the standard reference temperature in thermodynamics tables, so the value 298.15 K appears constantly in chemistry problems and property tables in courses across Canadian universities.

Is a Kelvin degree the same size as a Celsius degree?

Yes. One kelvin and one Celsius degree represent the same temperature interval, so a rise of 10°C in Toronto is exactly a rise of 10 K. The scales differ only by the 273.15 offset, which is why conversion is simple addition.

What is 37°C in Kelvin?

37°C equals 310.15 K. Normal human body temperature is often quoted as 310 K in physiology and biomedical literature — the convention followed in Health Canada guidance and medical schools alike — and fever thresholds such as 38°C = 311.15 K are reported the same way.

Why do scientists use Kelvin instead of Celsius?

Because Kelvin is an absolute scale: 0 K is absolute zero, so temperature is directly proportional to thermal energy. Formulas such as the ideal gas law (PV = nRT), the Stefan-Boltzmann law, and Arrhenius rate equations only give correct results when temperature is entered in Kelvin — which is why SI-based engineering and science programs across Canada insist on it.

What is 100°C in Kelvin?

100°C equals 373.15 K, the boiling point of water at sea level. Heads-up for higher elevations: in Calgary (about 1,045 m) or Whitehorse, water boils closer to 96-97°C, though the sea-level 373.15 K anchor is what steam tables and engineering references list.

About Celsius to Kelvin Converter

Our free online Celsius to Kelvin converter adds the exact SI offset of 273.15 to any value you enter, turning everyday Celsius readings into absolute temperatures for physics, chemistry, and engineering. Canada adopted Celsius for weather in 1975 and went metric in the 1970s, so Canadian students and professionals think in °C — but gas-law equations, phase diagrams, and cryogenic specifications all demand Kelvin. Whether you are solving a thermodynamics problem set at McGill, checking an -80°C ultra-low freezer in a Toronto research lab, reviewing Environment Canada data, or preparing an SI-units lab report, this tool gives instant, exact results. The Celsius scale, introduced by Anders Celsius in 1742, and the Kelvin scale, proposed by Lord Kelvin in 1848 and now an SI base unit, use the same size degrees — they differ only by the fixed 273.15 offset.

Expert Tips for Celsius to Kelvin Conversion

The conversion is pure addition: K = °C + 273.15. Never multiply Celsius by any factor — temperature intervals are already identical in size (Δ1°C = Δ1 K).

Memorize the science anchors: 0°C = 273.15 K (freezing), 25°C = 298.15 K (thermodynamic standard), 37°C = 310.15 K (body temperature), 100°C = 373.15 K (boiling).

Cryogenic checkpoints: liquid nitrogen boils at about 77 K (-196°C), dry ice sublimates at 194.65 K (-78.5°C), and an ultra-low lab freezer at -80°C holds 193.15 K — while a -40°C prairie cold snap (where Celsius meets Fahrenheit) is 233.15 K.

Materials data with Canadian industry ties: aluminum melts at 933.15 K (660°C) for Quebec's smelters, nickel at 1728 K (1455°C) for Sudbury ores, iron at 1811.15 K (1538°C) for steel mills, gold at about 1337 K (1064°C), and tungsten at 3695.15 K (3422°C).

Keep the full 273.15 constant through intermediate steps. Since the 2019 SI redefinition the offset is exactly 273.15, and dropping the .15 early is a classic source of wrong answers in graded coursework.