What shape assumption is used?

The calculator assumes smooth spherical particles.

How does size affect SSA?

Smaller particles produce higher surface area per mass for the same density.

Is this a BET replacement?

No. It is a geometric estimate, not a gas-adsorption measurement.

ToolsConductScience tool

PowdersFree in-browser calculator

Specific Surface Area Calculator.

Estimate powder specific surface area from particle diameter and density. 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 specific surface data to see the full workflow

Specific Surface inputs

Particle diameter

Density

g/cm3

Results

Specific surface area

0.096 m2/g

Diameter

SSA

0.096

Review notes

Porosity, roughness, agglomeration, and non-spherical shape can make real surface area much higher.

Methods note

For smooth spheres, SSA in m2/g is approximated by 6 / (density g/cm3 * diameter um).

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

Specific Surface Area Calculator (1.2.0). ConductScience, Inc. 2026. Available at: https://conductscience.com/tools/specific-surface-area-calculator

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

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