ONE FORMULA, ONE ANSWER
Dilute Solution Osmotic Pressure Calculator
Check osmotic pressure with the ideal dilute-solution approximation. Choose input units and calculate one value within the stated conditions.
Inputs
Calculations run in this browser. Scientific notation such as 1.2e-3 is supported. Do not group thousands.
Result
Ideal dilute-solution osmotic pressure Π
Enter values and select Calculate.
Π = i c R T
Assumptions
Use i,T>0 and c≥0. Assume a dilute ideal solution. Dissociation and nonideality are represented only within the valid range of the entered i. Convert mol/L to mol/m³ by multiplying by 1000.
Displayed values are floating-point approximations. Measurement uncertainty and design safety factors are not calculated.
Formula references and credits
NaNa Lab created the code, descriptions, icons and preview images. Text, figures and code from the linked references have not been reproduced.
Physical constants: NIST / CODATA 2022. The values of μ₀ and ε₀ are measured recommendations, not exact defining constants. Values and precision notes are in the source record.
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