What equation is used?

The calculator uses RMS length = sqrt(2 * dimensions * D * t).

Enter D in um2/s and time in seconds. Output length is in um.

Is boundary diffusion modeled?

No. This is a simple free-diffusion estimate.

ToolsConductScience tool

DiffusionFree in-browser calculator

Diffusion Length Calculator.

Estimate RMS diffusion distance from diffusivity and time. For materials research, education, and protocol documentation only. Not a certified inspection, compliance, asset-integrity, or final acceptance tool.

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Validated2026-05-24

CitableMethods and citation included

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Load example diffusion length data to see the full workflow

Diffusion Length inputs

Diffusivity

um2/s

Time

Dimensions

Results

RMS length

75.895 um

Dimensions

0.8

Length

75.895

Review notes

This does not model boundaries, reactions, concentration dependence, or anisotropic diffusion.

Methods note

Uses RMS length = sqrt(2 * dimensions * diffusivity * time).

Scope and limitations

For materials research, education, and protocol documentation only. Not a certified inspection, compliance, asset-integrity, or final acceptance tool.

Results are deterministic calculations from the values entered here. Review units, assumptions, and measurement quality before using outputs in reports or protocols.

Method

Uses the tool-specific formulas and assumptions shown in the calculator output.

Validated

Last validated 2026-05-24. Calculations are designed for planning and documentation support; verify procurement decisions against manufacturer specifications or institutional SOPs.

How to cite

How to Cite

Diffusion Length Calculator (1.2.0). ConductScience, Inc. 2026. Available at: https://conductscience.com/tools/diffusion-length-calculator

For materials research, education, and protocol documentation only. Not a certified inspection, compliance, asset-integrity, or final acceptance tool.

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