Boyles Law Calculator
Calculate final gas volume at constant temperature.
Boyles Law measurements
Enter your values, then calculate.
Result
How to calculate boyles law
Boyle's Law describes the inverse relationship between pressure and volume for a gas at constant temperature — one of the foundational gas laws in chemistry and physics.
How the calculation works
P₁V₁ = P₂V₂, solved for final volume: V₂ = (P₁ × V₁) ÷ P₂.
Example
A gas at initial pressure 2 atm and volume 5 L, compressed to a final pressure of 4 atm: V₂ = (2 × 5) ÷ 4 = 2.5 L.
Frequently asked questions
How is Result calculated?
Result = [Initial pressure] × [Initial volume] ÷ [Final pressure].
Is the Boyles Law Calculator free to use?
Yes — every calculator on Simple Calculator Tools is free, runs in your browser, and does not require an account.
Boyles Law Calculator
P₁V₁ = P₂V₂, solved for final volume: V₂ = (P₁ × V₁) ÷ P₂.
Let's understand your boyles law result.
Calculate a result above and this guide will help you interpret it using this calculator's own formula and explanation.
Pro Tips for Boyles Law
- Boyle's Law only applies when temperature and the amount of gas stay constant — if temperature changes too, you'd need the combined gas law instead.
- Keep pressure units consistent between initial and final values (both in atm, or both in kPa, etc.) since the ratio is what matters, not the absolute units.
Common Boyles Law Mistakes to Avoid
- Applying Boyle's Law to a situation where temperature also changes, which requires the combined gas law (or ideal gas law) instead of Boyle's Law alone.
When to Use This Calculator
Boyle's Law describes the inverse relationship between pressure and volume for a gas at constant temperature — one of the foundational gas laws in chemistry and physics.