Dalton
Dalton's Law Calculator adds a comma-separated list of partial pressures to give the total pressure and reports how many gases were entered.
What this calculator does
The Dalton estimates your result instantly from the values you enter, using standard science & engineering formulas. Dalton's Law Calculator adds a comma-separated list of partial pressures to give the total pressure and reports how many gases were entered. 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 Dalton
Dalton's Law states that the total pressure of a gas mixture equals the sum of the partial pressures of its components.
List each partial pressure separated by commas and the tool adds them and counts how many you supplied.
Formula & Mathematical Calculation
Total Pressure = f(Partial Pressures (comma-separated))
Calculated according to standard science formulas implemented in the calculator core.
Calculation Example
For partial pressures of 1.2, 0.8 and 0.5:
total = 1.2 + 0.8 + 0.5 = 2.5 across 3 gases.
Key Benefits
- Sums any number of partial pressures at once
- Counts the gases in the mixture automatically
- Rejects negative pressures with an inline message
- Works with any consistent pressure unit you use
How to Use this Calculator
-
List the partial pressures
Enter each partial pressure separated by commas in the Partial Pressures field. -
Calculate
Select Calculate to total them. -
Read the totals
Read Total Pressure and Number of Gases in the result boxes.
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
- Dalton 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.