Charles's Law Calculator

Apply Charles's law to find temperature or volume.

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Fill in the fields below to calculate

V₁/T₁ = V₂/T₂

Temperature must be in Kelvin. 0°C = 273.15 K

Initial Volume (V₁)

Initial Temperature (T₁)

Final Volume (V₂)

Final Temperature (T₂)

Enter your values above and tap Calculate to see the result.

V₁ / T₁ = V₂ / T₂

V₁ = Initial volume

T₁ = Initial temperature (K)

V₂ = Final volume

T₂ = Final temperature (K)

Pressure must remain constant

Pro Tips

Results update as you type — change any field to see the effect immediately.

Check that every value uses the same unit before comparing results.

Use the copy button to paste the charles's law figures into a note or spreadsheet.

Nothing is sent to a server, so you can use this with private figures.