Boyle's Law Calculator
Pressure and volume at constant temperature.
Enter your values
Results update instantly as you type — no submit needed.
Results
- Final pressure
- 2.4 atm
- Pressure change
- 0.9 atm
- Volume ratio
- 1.6
- Constant P×V
- 6
Working
- 1P₂ = (1.5 × 4) ÷ 2.5 = 2.4 atm
Quick answer
At constant temperature, gas pressure and volume are inversely proportional, so P₁V₁ = P₂V₂.
P₁V₁ = P₂V₂
How to use the Boyle's Law Calculator
- 1Enter the initial pressure and volume.
- 2Enter the new volume.
- 3Keep units consistent throughout.
Frequently asked questions
Does temperature matter?
Boyle's law assumes it is constant; otherwise use the combined gas law.
Is it exact?
It is an ideal-gas approximation — real gases deviate at high pressure.