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sci.nanoparticle-surface-area Calculator
Calculates nanoparticle surface area per gram from particle diameter and density: SA = 6/(ρd). A 10 nm titanium dioxide nanoparticle has surface area 150 m²/g — 1,000× larger than 10 µm particles, explaining the dramatically different reactivity, catalytic activity, and toxicological profile of nanomaterials.
Inputs
D Nm
Distance across a circle through its centre. Always confirm units match the rest of the calculation.
Rho G Cm3
Mass per unit volume (kg/m³). Water: 1,000. Air: 1.225. Steel: 7,850. Affects buoyancy, flow, and structural loads.
Mass G
Total mass (kg). Distinct from weight — weight = mass × gravity. Mass is constant; weight varies with location.
Results
specific surface area SSA (m²/g)
The computed two-dimensional surface area.
total surface area (m²)
The combined total across all inputs and components.
number of particles per gram
Sample size or count used in the calculation.
SSA = 6/(ρ·d)
Reference formula or conversion factor shown for context.
surface-to-volume ratio (1/m)
The computed three-dimensional volume.
size effect
Reference formula or conversion factor shown for context.