Boyle's Law Calculator

Find the new pressure of a gas when its volume changes at constant temperature.

Initial pressure (kPa)

Initial volume

Final volume

Final pressure (kPa) 200

Formula: P₁V₁ = P₂V₂

Step-by-step with your numbers:

1. Values used:

2. Initial pressure = 100 kPa

3. Initial volume = 2

4. Final volume = 1

6. Final pressure = Initial pressure x Initial volume = 100 x 2 = 200kPa

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Boyle's law: at constant temperature, gas pressure and volume are inversely related.

The math behind it

P₁V₁ = P₂V₂. Halving the volume doubles the pressure.

100 kPa at 2 L compressed to 1 L → 200 kPa.

What must stay constant?

Temperature and the amount of gas.