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Solve for the missing pressure or volume value using Boyle's Law, at constant temperature.

How It Works

How Boyle's Law Calculator Works

Boyle's Law describes how a gas's pressure and volume trade off against each other when temperature stays constant — their product stays the same, so compressing a gas into a smaller volume proportionally raises its pressure. Enter any three of the four values (P1, V1, P2, V2) to solve for the missing one.

FAQ

Frequently Asked Questions

Why does this only apply at constant temperature?
Boyle's Law isolates the pressure-volume relationship specifically by holding temperature fixed — if temperature also changes, the more general ideal gas law is needed instead to capture all three variables at once.