What is the formula for Kelvin?

What is the formula for Kelvin?

• A. K = °F + 273
• B. K = °C - 273
• C. K = °C
• D. K = °C + 273

Answer: (D)

Kelvin is found by shifting the Celsius scale up by a constant amount. To go from Celsius to Kelvin, you add about 273.15 degrees (often approximated as 273 in basic problems). So the relationship is K = C + 273.15, meaning you take the Celsius temperature and add a fixed offset to get Kelvin. Among the given options, the form that adds a constant to Celsius best matches this idea, which is why it’s the correct choice. The others either use the wrong sign, mix up units, or set Kelvin equal to Celsius directly, which ignores the necessary offset between the scales.

Kelvin is found by shifting the Celsius scale up by a constant amount. To go from Celsius to Kelvin, you add about 273.15 degrees (often approximated as 273 in basic problems). So the relationship is K = C + 273.15, meaning you take the Celsius temperature and add a fixed offset to get Kelvin.

Among the given options, the form that adds a constant to Celsius best matches this idea, which is why it’s the correct choice. The others either use the wrong sign, mix up units, or set Kelvin equal to Celsius directly, which ignores the necessary offset between the scales.