Pressure Law Calculator
ALWAYS use absolute temperature with this calculator.

P1               P2
------     =     ------
T1               T2

The above formula is the Pressure Law, which states that the pressure of a fixed mass of gas at a constant volume is directly proportional to its absolute temperature.

In other words, when temperature increases, pressure increases.
When pressure decreases, temperature decreases.

This law is sometimes referred to as Gay-Lussac's Law named after the French chemist and physicist Joseph Louis Gay-Lussac (1778 - 1850).

As a practice example, a gas at 2 atmospheres of pressure has a temperature of 250 degrees Kelvin.
Calculate the pressure if the temperature increases to 300 degrees Kelvin. Your answer should equal 2.4 atmospheres.


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Significant Figures >>>
The default setting is for 5 significant figures but you can change that by inputting another number in the box above.

Answers are displayed in scientific notation and for easier readibility, numbers between .001 and 1,000 will be displayed in standard format (with the same number of significant figures.)
The answers should display properly but there are a few browsers that will show no output whatsoever. If so, enter a zero in the box above. This eliminates all formatting but it is better than seeing no output at all.
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