Boyle’s Law Calculator
🔥 Heat & thermodynamics. Use the Boyle’s law formula to find new pressure, pressure, volume, new volume: pick the value you want, type the others, and the answer updates as you go.
Same amount of gas, constant temperature.
Pick the ○ next to the value you want to find, fill in the others, and it solves as you type.
What each letter means
| Quantity | Unit |
|---|---|
| New pressure | kPa |
| Pressure | kPa |
| Volume | L |
| New volume | L |
Worked example
Find the new pressure when Pressure = 100 kPa, Volume = 4 L, New volume = 2 L.
Using p1V1 = p2V2: New pressure = 200 kPa.
Frequently asked questions
What is the formula for Boyle’s law?
p1V1 = p2V2. Same amount of gas, constant temperature.
What do the letters stand for, and what units are used?
New pressure in kPa, Pressure in kPa, Volume in L, New volume in L.
How do you calculate new pressure?
Put the values into p1V1 = p2V2. For example, with Pressure = 100 kPa, Volume = 4 L, New volume = 2 L, new pressure = 200 kPa.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (new pressure, pressure, volume, new volume) and fill in the others: it rearranges the formula for you.
