Charles’s Law Calculator
💨 Gas Laws & Fluids. Use the Charles’s law formula to find new volume, starting volume, starting temperature, new temperature: pick the value you want, type the others, and the answer updates as you go.
At constant pressure, with T in kelvin.
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 volume | L |
| Starting volume | L |
| Starting temperature | K |
| New temperature | K |
Worked example
Find the new volume when Starting volume = 2 L, Starting temperature = 300 K, New temperature = 330 K.
Using V1/T1 = V2/T2: New volume = 2.2 L.
Frequently asked questions
What is the formula for Charles’s law?
V1/T1 = V2/T2. At constant pressure, with T in kelvin.
What do the letters stand for, and what units are used?
New volume in L, Starting volume in L, Starting temperature in K, New temperature in K.
How do you calculate new volume?
Put the values into V1/T1 = V2/T2. For example, with Starting volume = 2 L, Starting temperature = 300 K, New temperature = 330 K, new volume = 2.2 L.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (new volume, starting volume, starting temperature, new temperature) and fill in the others: it rearranges the formula for you.
