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Boyle Law calculator
Boyle's law says that for a fixed amount of gas at constant temperature, pressure and volume are inversely related. Use it to find any one of the four values.
Boyle Law calculatorBoyle's Law
P₁V₁ = P₂V₂ · Isothermal Gas Behavior Engine
Boyle's law describes the spring in a gas: at constant temperature, pressure and volume trade against each other, so squeezing a gas into half the space doubles its pressure. This calculator solves any one unknown in the P1V1 = P2V2 relationship.
How to use this calculator
- Enter any three of: initial pressure, initial volume, final pressure, final volume.
- Leave the value you want to find empty.
- Press calculate to see the missing value.
The condition everyone forgets
The law holds only while temperature and the amount of gas stay fixed. Warm the gas or let some escape and the simple product no longer stays constant. Real exam and lab questions hide those changes deliberately, so check the conditions before trusting the arithmetic.
Frequently asked questions
What is Boyle's law formula?
P1V1 = P2V2, where P is pressure and V is volume, at constant temperature and amount of gas.
Do the units matter?
Any pressure unit and any volume unit work, as long as both sides use the same ones. The answer comes out in the unit of the side you solved for.
Where is Boyle's law visible in real life?
A syringe (pulling the plunger lowers pressure and draws fluid in), a diver's expanding air on ascent, and weather balloons growing as outside pressure falls.