calculate
lock Free · Private · In-Browser
Combined Gas Law Calculator
Solve P1V1/T1 = P2V2/T2 for the missing value.
Leave the value you want to find as 0.
All three gas variables
The combined gas law ties pressure, volume, and temperature together in one relationship, so a change in any of them predicts the others for a fixed amount of gas.
With five of the six values, the sixth follows from P1V1 over T1 equals P2V2 over T2, temperatures in kelvin. Set the unknown to zero to solve it.
Complete and private
The calculation runs in your browser, so nothing you enter is uploaded.
Frequently Asked Questions
What is the combined gas law?
It merges Boyle’s and Charles’s laws: pressure times volume over temperature stays constant for a fixed amount of gas.
Which temperature units?
Kelvin. Convert from Celsius by adding 273.15.
What does it solve?
Any one of the six values. Leave the unknown as zero.
Take it further
All Free Tools
Browse the full set of free, private, in-browser tools.