To convert from Kelvin to Celsius, we use the formula:

Celsius = Kelvin – 273.15

So, to convert 251 Kelvin to Celsius:

Celsius = 251 – 273.15

Celsius ≈ -22.15

This means that 251 Kelvin is approximately equal to -22.15 degrees Celsius.

Kelvin is a unit of temperature in the metric system and is commonly used in scientific contexts. It is often used in conjunction with Celsius, another unit of temperature measurement. To convert from Kelvin to Celsius, we subtract 273.15 from the given temperature in Kelvin. This is because the zero point on the Kelvin scale is equivalent to -273.15 degrees Celsius.

For example, if we have a temperature of 300 Kelvin, we would convert it to Celsius using the formula:

Celsius = 300 – 273.15

Celsius ≈ 26.85

So, 300 Kelvin is approximately equal to 26.85 degrees Celsius.

In summary, to convert from Kelvin to Celsius, simply subtract 273.15 from the given temperature in Kelvin. This will give you the temperature in Celsius. Remember that Kelvin is an absolute temperature scale, so it does not have negative values, whereas Celsius can have negative values.