Formula
Π=i c RT; c in mol/L is multiplied by 1000 for SI pressure.
- 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.
- Dilute ideal solution separated by a semipermeable membrane; not a clinical tonicity model.
Example Calculation
Example inputs
- Solute molarity: 0.1 mol/L
- Temperature: 300 K
- van ’t Hoff factor: 1
0.1 mol/L at 300 K with i=1 gives about 249.434 kPa.
Method references
Frequently asked questions
How do I use this calculator?
Enter solute molarity, temperature, van ’t hoff factor. The result updates automatically. Use Reset to restore the example values.
What method does it use?
Π=i c RT; c in mol/L is multiplied by 1000 for SI pressure.. Dilute ideal solution separated by a semipermeable membrane; not a clinical tonicity model.
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.