When to use this calculator
Find a gas component’s partial pressure from its mole fraction. Ideal gas mixture model without reactions or condensation.
Explore the gas laws calculators for other questions in this topic. For a related calculation, use the Gas Density Calculator: Estimate ideal-gas density from absolute pressure, molar mass and temperature.
PUTTING IT INTO PRACTICE
Daltons Partial Pressure: a worked example
The values below are an illustrative example, not a recommendation. Replace them with measurements or assumptions that match your question.
| Input | Example value |
|---|---|
| Total absolute pressure | 100 |
| Mole fraction of component | 0.2 |
| Result | 20 input pressure units |
- Check the input labels and enter the example values above.
- Apply the relationship: Partial pressure = mole fraction × total pressure.
- The result is 20 input pressure units, rounded for display.
How to interpret your result
Ideal gas mixture model without reactions or condensation.
Gas-law ratios require absolute pressure and kelvin temperature. Hold the quantities specified by each law constant. Real gases can depart from ideal behaviour, especially at high pressure or low temperature.
Frequently asked questions
Can I enter Celsius in a gas-law temperature ratio?
No. Convert to absolute temperature in kelvins first. The Celsius zero point is not absolute zero.
When is the daltons partial pressure calculator useful?
Find a gas component’s partial pressure from its mole fraction. Ideal gas mixture model without reactions or condensation.
How do I use the daltons partial pressure calculator?
Enter total absolute pressure, mole fraction of component. The result updates automatically. Use the units shown beside each input; the example values illustrate the method.
Which formula does this calculator use?
Partial pressure = mole fraction × total pressure.
What should I check before using the result?
Ideal gas mixture model without reactions or condensation.
How are results rounded?
Scalar numbers display up to six decimal places, with scientific notation for very large or small values. Text, fraction, date and schedule outputs use the format described on the tool. Intermediate calculations use JavaScript floating-point arithmetic. Keep sensible precision for your measurements.
Further reading
For background on this topic, see OpenStax: gases and the ideal gas law ↗. This is a topic reference, not an external review or endorsement of this tool.
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