7 °C = 280.15 K (degree Celsius → kelvin)
7 °C = 280.15 K
7 degrees Celsius (°C) equals 280.15 kelvins (K). Temperature conversions are affine — the answer follows the standard scale formula, not a single multiplier.
Kelvins = Degrees Celsius × 1How 7 degrees Celsius compares to its arithmetic neighbours, converted to kelvins.
| Relation | degrees Celsius | kelvins |
|---|---|---|
| ÷10 | 0.7 °C | 273.85 K |
| ÷2 (half) | 3.5 °C | 276.65 K |
| ×1 (this value) | 7 °C | 280.15 K |
| ×2 (double) | 14 °C | 287.15 K |
| ×5 | 35 °C | 308.15 K |
| ×10 | 70 °C | 343.15 K |
Celsius to Kelvin is a pure offset: K = C + 273.15. The scales share a degree size; only the zero point differs. Water freezes at 0 °C = 273.15 K and boils at 100 °C = 373.15 K. Absolute zero is 0 K = −273.15 °C. Kelvin is the SI base unit of thermodynamic temperature, mandatory for physics calculations involving ideal gases, black-body radiation, or any expression where the temperature is raised to a power.
Laboratory freezers and cryogenic storage logs record temperature in Celsius but scientific instruments and gas-law calculations need Kelvin: liquid nitrogen at −196 °C is 77.15 K, dry ice at −78.5 °C is 194.65 K, and a −20 °C lab freezer is 253.15 K. The offset is exact and constant — 273.15 — so unlike the Fahrenheit conversion there's no scaling step to get wrong, only the arithmetic of adding a fixed number, which is why Kelvin is the unit of choice whenever a formula needs an absolute reference.
Begin with your temperature in degrees Celsius.
K = °C + 273.15
The result is the equivalent temperature in kelvins. For example, 100 °C = 373.15 K.
Temperature conversion is affine, not a single multiplication. The exact formula is shown below — it follows directly from the definitions of the degree Celsius and kelvin scales.
K = °C + 273.15
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
| Degrees Celsius (°C) | Kelvins (K) |
|---|---|
| -50 °C | 223.15 K |
| -40 °C | 233.15 K |
| -30 °C | 243.15 K |
| -25 °C | 248.15 K |
| -20 °C | 253.15 K |
| -15 °C | 258.15 K |
| -10 °C | 263.15 K |
| -5 °C | 268.15 K |
| -2 °C | 271.15 K |
| -1 °C | 272.15 K |
| 0 °C | 273.15 K |
| 1 °C | 274.15 K |
| 2 °C | 275.15 K |
| 5 °C | 278.15 K |
| 10 °C | 283.15 K |
| 15 °C | 288.15 K |
| 18 °C | 291.15 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 |
| 27 °C | 300.15 K |
| 28 °C | 301.15 K |
| 30 °C | 303.15 K |
| 32 °C | 305.15 K |
| 35 °C | 308.15 K |
| 37 °C | 310.15 K |
| 40 °C | 313.15 K |
| 45 °C | 318.15 K |
| 50 °C | 323.15 K |
| 55 °C | 328.15 K |
| 60 °C | 333.15 K |
| 65 °C | 338.15 K |
| 70 °C | 343.15 K |
| 75 °C | 348.15 K |
| 80 °C | 353.15 K |
| 85 °C | 358.15 K |
| 90 °C | 363.15 K |
| 95 °C | 368.15 K |
| 100 °C | 373.15 K |
| 110 °C | 383.15 K |
| 120 °C | 393.15 K |
| 150 °C | 423.15 K |
| 180 °C | 453.15 K |
| 200 °C | 473.15 K |
| 250 °C | 523.15 K |
| 300 °C | 573.15 K |
| 500 °C | 773.15 K |
Water freezes at 0 °C. Room temperature is around 20–22 °C. Healthy human body temperature is about 37 °C. In kelvins, that gives you: 1 °C = 274.15 K, 10 °C = 283.15 K, 100 °C = 373.15 K.
The degree Celsius (°C) is the SI-derived unit of temperature on a scale where 0 °C is the freezing point of water at standard pressure and 100 °C is the boiling point. Defined in 1742 by Anders Celsius (originally with the scale inverted) and refined repeatedly since, it shares its size of degree with the Kelvin: a change of 1 °C is identical to a change of 1 K. It is the everyday temperature unit almost everywhere outside the United States.
The kelvin (K) is the SI base unit of thermodynamic temperature. Since the 2019 SI redefinition it is defined by fixing the Boltzmann constant to exactly 1.380649 × 10⁻²³ J/K. Zero kelvin is absolute zero, the lowest temperature theoretically possible. The kelvin is preferred in science and engineering because it has a true zero — temperature ratios become physically meaningful, unlike on the Celsius or Fahrenheit scales. Note: by convention there is no degree sign — 300 K, not 300 °K.
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