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Diffusion Coefficient Calculator
Diffusion coefficient from the Stokes-Einstein equation and mean displacement over time.
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Diffusion coefficient
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Diffusion coefficient from the Stokes-Einstein equation and mean displacement over time.
Diffusion Coefficient Estimator
Enter your numbers below for an instant estimate.
0
💡 Tip: D = kT / (6 pi eta r).
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
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3
Review
Read the breakdown and the explanation.
4
Adjust
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Quick Reference Guide
Diffusion Quick Guide
Typical values for reference.
| T K | Viscosity | Radius nm | D |
|---|---|---|---|
| 298 | 0.89 | 1 | 2.452e-10 m2/s |
| 310 | 0.69 | 5 | 6.581e-11 m2/s |
| 298 | 0.89 | 50 | 4.905e-12 m2/s |
| 350 | 0.37 | 2 | 3.464e-10 m2/s |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
Diffusion Coefficient Calculator FAQ
Answers to common questions about this calculator.
How quickly particles spread through a medium.
D = kT / (6 pi eta r) for spheres in a fluid.
Yes, D rises with temperature.
Only roughly.