Partial Pressure Calculator
Calculate partial pressure with explicit inputs and a worked example.
Formula
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- Educational calculation using the stated ideal model. Inputs must describe the same system; not a dosing or laboratory procedure.
Example Calculation
- Total pressure: 100 kPa
- Mole fraction: 0.2
Mole fraction 0.2 in an ideal gas mixture at 100 kPa gives 20 kPa.
Method references
Frequently asked questions
How do I use this calculator?
Enter total pressure, mole fraction. The result updates automatically. Use Reset to restore the example values.
What method does it use?
partial pressure = mole fraction × total pressure. Educational calculation using the stated ideal model. Inputs must describe the same system; not a dosing or laboratory procedure.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.