Charles
Use Charles's law to find a gas's final volume at constant pressure. Enter the initial volume and the initial and final temperatures in kelvin, and the tool returns V2 = V1 x T2 / T1. Free and browser-based.
What this calculator does
The Charles estimates your result instantly from the values you enter, using standard science & engineering formulas. Use Charles's law to find a gas's final volume at constant pressure. Enter the initial volume and the initial and final temperatures in kelvin, and the tool returns V2 = V1 x T2 / T1. Free and browser-based. Calculations run in your browser, so nothing you type is sent to a server, and the output is an estimate rather than a certified or official figure.
Result
About Charles
The Charles's Law Calculator applies the constant-pressure relationship V₁ ÷ T₁ = V₂ ÷ T₂ to solve for the final volume. Enter the initial volume V1 and the initial and final temperatures in kelvin.
The final volume is V2 = V1 × T2 ÷ T1, rounded to four decimal places.
Formula & Mathematical Calculation
Final Volume (V2) = f(Initial Volume (V1), Initial Temp (K), Final Temp (K))
Calculated according to standard science formulas implemented in the calculator core.
Calculation Example
With V1 = 2, T1 = 300 K, and T2 = 350 K:
V2 = 2 × 350 ÷ 300 = 2.3333
Key Benefits
- Solves Charles's law for the final volume at constant pressure
- Requires temperatures in kelvin, matching how the gas law behaves
- Rounds the final volume to four decimal places
- Free, runs in the browser, and needs no sign-up
How to Use this Calculator
-
Enter the initial volume
Type V1 into the Initial Volume (V1) field, for example 2. -
Enter the temperatures
Type the starting temperature into Initial Temp (K) and the ending temperature into Final Temp (K), such as 300 and 350. -
Calculate
Select Calculate to read the final volume V2, rounded to four decimals.
Assumptions & Limitations
What the calculation assumes
- Every value you enter is treated as an exact, known amount.
- Any rate or interval you enter is assumed to hold for the whole period unless the form asks for it separately.
- Results use standard published formulas and account only for the values entered above.
- Rounding is applied for display; the underlying calculation uses your full precision.
- Results are returned in the same units you enter, unless the tool states the output unit.
What it does not cover
- Charles produces a calculated result for reference and learning, not a certified or official measurement.
- Real-world outcomes differ when tolerances, rounding rules or local standards apply.
- Definitions and standards vary by region and change over time; verify the convention that applies to your case.
- Figures are only as accurate as the inputs you supply — check them before acting on the result.
- For work where the result carries real consequences, confirm it against an authoritative source.
Frequently Asked Questions
Free to use, no account needed. Calculations run in your browser, so nothing you type is sent to a server. Results are estimates — how we build and check our calculators.