Why must temperature be Kelvin?

The law uses absolute temperature; Celsius has an arbitrary zero.

Can pressure units differ?

Convert them to a common unit before applying the equation.

Relate pressure, volume, and absolute temperature between two states of a fixed amount of gas.

For a fixed amount of gas, P₁V₁/T₁ = P₂V₂/T₂. Convert temperatures to Kelvin before solving the one blank value.

P₁V₁/T₁ = P₂V₂/T₂

Enter your values in the browser tool to see the result, worked steps, assumptions, and related learning guides.