How to use this calculator
- Select V1, V2, T1, or T2 as the unknown.
- Enter the other volume and temperature values.
- Select the units and calculate.
Formula and variables
V1/T1 = V2/T2
| Symbol | Meaning | Unit |
|---|---|---|
| V1, V2 | initial/final volume | compatible volume |
| T1, T2 | absolute temperature | K |
Worked example
A gas occupying 1 L at 300 K occupies 2 L at 600 K at constant pressure.
Interpretation
Volume is proportional to absolute temperature at fixed pressure and amount.
Common mistakes
- Use absolute temperature in Kelvin.
- This relation assumes constant pressure and gas amount.
Frequently asked questions
What stays constant in Charles's law?
Pressure and amount of gas stay constant.
Can I enter a Celsius temperature?
Yes. The calculator converts Celsius to Kelvin before it uses the ratio.
Can the calculator solve for temperature?
Yes. It can solve for either initial or final absolute temperature.
Can I use scientific notation?
Yes. Enter values such as 6.022e23 or 1.0e-6 in a numeric field.
How should I round the result?
Keep extra digits during the calculation. Round the final result to the precision required by your data.