Boyle's Law (P₁V₁ = P₂V₂)
Constant T, constant n: pressure × volume = constant.
Result
V₂
10.0000
100 × 5 / 50 = 10.0000.
- P₁100
- V₁5
- P₂50
- V₂10.000000
- P₁V₁500.0000
- P₂V₂500.0000
Step-by-step
- P₁V₁ = P₂V₂ at constant T, n.
- V₂ = P₁V₁ / P₂ = 100 × 5 / 50 = 10.0000.
How to use this calculator
- Enter P₁, V₁, P₂.
- Read V₂.
About this calculator
Boyle's Law (1662): for fixed n, T, gas pressure × volume is constant. Doubling pressure halves volume. Demonstrated with sealed syringe — push, pressure rises, volume drops. Relevant to scuba diving (air compresses going deep), cylinders + pneumatic systems, and deep-sea creatures (collapsible body cavities).
Frequently asked
Yes — Boyle assumes isothermal. If T changes, use combined gas law.
Related calculators
Ideal Gas Law (PV = nRT)
Solve for any of P, V, n, T given the other three. R = 8.314 J/(mol·K).
Charles's Law (V₁/T₁ = V₂/T₂)
Constant P: volume scales linearly with absolute temperature.
Avogadro's Law (V₁/n₁ = V₂/n₂)
At constant T, P: volume scales with number of moles.
Combined Gas Law (P₁V₁/T₁ = P₂V₂/T₂)
When n is constant, all of P, V, T can change. Solve for any one.
Atomic Mass from Isotopes Calculator
Σ (isotope mass × abundance fraction). Periodic-table atomic mass from isotope mix.
Henderson-Hasselbalch (Buffer pH)
pH = pKa + log([A⁻]/[HA]). Predict buffer pH from acid + conjugate base concentrations.