Avogadro
Avogadro's Law Calculator finds a final gas volume from an initial volume, initial moles, and final moles using V2 = V1 times n2 divided by n1.
What this calculator does
The Avogadro estimates your result instantly from the values you enter, using standard science & engineering formulas. Avogadro's Law Calculator finds a final gas volume from an initial volume, initial moles, and final moles using V2 = V1 times n2 divided by n1. 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 Avogadro
Avogadro's Law says a gas volume is proportional to its number of moles when temperature and pressure stay constant.
Enter the initial volume with the initial and final moles, and the tool scales the volume to its new value.
Formula & Mathematical Calculation
Final Volume (V2) = f(Initial Volume (V1), Initial Moles (n1), Final Moles (n2))
Calculated according to standard science formulas implemented in the calculator core.
Calculation Example
For V1 = 2, n1 = 1 mol and n2 = 2 mol:
V2 = 2 × 2 ÷ 1 = 4 at constant temperature and pressure.
Key Benefits
- Scales gas volume directly with the mole ratio
- Requires positive initial moles to keep the ratio valid
- Works with any volume unit you choose
- Assumes constant temperature and pressure as Avogadro's Law states
How to Use this Calculator
-
Enter initial volume
Type the starting volume in the Initial Volume field. -
Enter initial moles
Type the starting number of moles in the Initial Moles field. -
Enter final moles
Type the new number of moles in the Final Moles field. -
Calculate
Select Calculate and read Final Volume (V2) in the result box.
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
- Avogadro 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.