Charles Law Calculator
Apply Charles law for volume and temperature.
About Charles Law Calculator
The combined gas law for Charles Law holds P*V/T constant between two states, so a rise in temperature with pressure fixed must expand the volume. Gas laws all express the same idea: temperature, pressure and volume move together in a fixed ratio.
Formula
Charles Law
P1V1/T1 = P2V2/T2 with constant pressure
- combined law
- Boyle and Charles laws combined into one relationship
Worked example
With the default values below, Charles Law Calculator returns Final Volume of 1.333. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Initial pressureminimum 0 Pa
- 101,325 Pa
- Initial volumeminimum 0 L
- 1 L
- Initial temperatureminimum 0 K
- 300 K
- Final temperatureminimum 0 K
- 400 K
Results
- Final Volume
- 1.333 L
- Pressure Ratio
- 1.000
- Temperature Ratio
- 1.333
Step by step
- 1Values used
- 2Charles Law
- 3Final Volume= 1.333 L
- 4Pressure Ratio= 1.000
- 5Temperature Ratio= 1.333
Assumptions and limits
- The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Charles Law calculated?
P1V1/T1 = P2V2/T2 with constant pressure The combined gas law for Charles Law holds P*V/T constant between two states, so a rise in temperature with pressure fixed must expand the volume.
Why does Charles Law matter?
Gas laws all express the same idea: temperature, pressure and volume move together in a fixed ratio.
What values do I need to enter?
This calculator takes 4 inputs: Initial pressure, Initial volume, Initial temperature, Final temperature. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.