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Boyle's Law Calculator

Boyle's Law Calculator is part of Toolspire and is ready as soon as this page loads. Temperature and the amount of gas are assumed constant. The pressures must use the same unit, and the volumes come back in the unit of V1.

Runs in this tabFreeNo account

On this page

What you can do here

Solves for the second volume

The unknown is V2. Swap the story if you already know both volumes and want a pressure.

Doubling is the check

Pressure ×2 means volume ÷2 when temperature is held.

No Charles’s law term

A temperature change would need V/T, which is not in this product.

The sequence

How to use the Boyle's Law Calculator

  1. 1

    Use one pressure unit

    Atmospheres with atmospheres, or kilopascals with kilopascals.

  2. 2

    Hold the temperature story fixed

    If you heated the gas as well, Boyle’s law alone is the wrong tool.

  3. 3

    Check 1 litre

    From 2 litres at 1 pressure unit to 2 pressure units.

Worth knowing

  • Boyle's Law Calculator on Toolspire: P1 V1 = P2 V2, so V2 = P1 V1 / P2.
  • 1 × 2 / 2 = 1. Doubling the pressure halves the volume.
  • Pressure and volume units are not converted. 1 atm and 2 atm stay consistent if you do.
  • A second pressure of 0 is rejected.

The product stays constant

Boyle’s law says that for a fixed amount of gas at a fixed temperature, pressure times volume is constant. Compressing 2 litres at 1 atmosphere into 2 atmospheres leaves 1 litre. The page multiplies and divides those three inputs. It does not know whether the gas is ideal, and it does not apply a temperature ratio.

FAQ

Questions about Boyle's Law Calculator

Where does Boyle's Law Calculator run?

Boyle's Law Calculator runs in this tab on Toolspire. What you type or drop in is not sent to us and is not stored on a server.

What volume is 2 L at 1 atm when the pressure becomes 2 atm?

1 L, if the temperature and the amount of gas stay the same.

What if I mix atm and kPa?

The number will be wrong. Convert to one unit first.

Does this include temperature?

No. Charles’s law is the temperature relationship. This product has no T.

Can pressure be zero?

The second pressure cannot. Division by zero is not a volume.

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