1 C to Kelvin – Answer and Calculator Tool

1 degree Celsius is equal to 274.15 kelvin.

To convert 1 °C to kelvin, you add 273.15 to the Celsius temperature. The kelvin scale starts at absolute zero, where all molecular motion stops. Celsius and kelvin degrees are exactly the same size—so the difference is only the zero point. The result for 1 °C is 274.15 K.

Conversion Tool

Conversion Formula

To change Celsius (°C) into kelvin (K), you use this formula:

K = °C + 273.15

The Celsius scale starts at the freezing point of water, but kelvin starts at absolute zero. Both scales increase at the same rate—so you just add 273.15, nothing else needed. Here is a step-by-step for 1 °C:

• Start with your Celsius value: 1
• Add 273.15 to it: 1 + 273.15
• The answer is 274.15 kelvin

No need for multiplication or any complex steps. It’s just a shift upward by 273.15 units. That’s because zero kelvin is -273.15 °C.

Conversion Example

• Convert 5 °C to kelvin.
  • Start with 5 °C.
  • Add 273.15: 5 + 273.15
  • The result is 278.15 K
• Convert -10 °C to kelvin.
  • Start with -10 °C.
  • Add 273.15: -10 + 273.15
  • Result is 263.15 K
• Convert 100 °C to kelvin.
  • Begin at 100 °C.
  • Add 273.15: 100 + 273.15
  • That gives 373.15 K
• Convert 0 °C to kelvin.
  • Start with 0 °C.
  • Add 273.15: 0 + 273.15
  • Final result is 273.15 K

Conversion Chart

This chart shows Celsius values from -24.0 to 26.0 and their kelvin equivalents. Read the left column for Celsius, right for kelvin. Use the chart to quickly look up conversions, no math required. Just match your Celsius value to the kelvin result.

Related Conversion Questions

• How much is 1 degree Celsius in kelvin exactly?
• What do I get if I add 273.15 to 1 Celsius?
• Is 1 Celsius equal to 274.15 kelvin every time?
• How do you convert 1 °C to kelvin step by step?
• What is the difference between 1 °C and 1 kelvin?
• If I have 1 Celsius, how many kelvin is that for laboratory work?
• Does 1 Celsius mean the same thing in kelvin for scientific calculations?

Conversion Definitions

c (Celsius): Celsius is a temperature scale based on the freezing point of water at 0 degrees and boiling at 100 degrees under standard atmospheric conditions. It’s widely used around the world for weather, industry, and science. One Celsius degree represents the same change as one kelvin.

kelvin: Kelvin is the base unit of temperature in the International System (SI). It begins at absolute zero, where particles has minimum thermal energy. No negative kelvin values exists. Each kelvin degree matches a Celsius degree, but the zero point is offset by 273.15 units.

Conversion FAQs

Why do you add exactly 273.15 when converting Celsius to kelvin?

273.15 is the exact temperature difference between the zero points of the Celsius and kelvin scales. Since kelvin starts at absolute zero, and Celsius at water’s freezing, you add 273.15 to align the two. That number never changes, even at high or low temperatures.

Can you convert negative Celsius values to kelvin?

Yes, any Celsius value could be converted to kelvin by adding 273.15. Negative Celsius numbers will result in positive kelvin numbers, unless you go below -273.15 °C, which is physically impossible. All natural temperatures in kelvin are above zero.

Is there a difference in degree size between Celsius and kelvin?

No difference exists in the size of one degree, both scales increase by the same amount per unit. The only difference is their starting point, so the conversion is just a simple addition, not multiplication or any scaling. Each step up or down is identical in size.

Are decimals important when converting to kelvin?

Decimals are very important, especially in science or engineering. Omitting the .15 could cause errors or confusion, especially when dealing with precise experiments. Always include the decimal for accurate conversions, even if it seems small sometimes.