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Specific Absorption Rate (SAR) Calculator

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Specific Absorption Rate (SAR) Calculator | RF Safety Tool
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RESULTS
SAR Specific Absorption Rate
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IPD Incident Power Density
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Input Parameters Specification

Electric Field RMS (E) Root-mean-square magnitude strength parameter of the active electromagnetic field wave, measured in Volts per meter (V/m).
Material Conductivity (σ) The electrical induction conductivity index coefficient of the targeted biological material or tissue layer, in Siemens per meter (S/m).
Mass Density (ρ) The physical mass density profile distribution index of the structural target medium layer, natively scaling in kg/m³.

Practical Operational Examples

Example 1: Standard Low-Exposure Tissue Model
• Electric Field RMS (E) = 10.00 V/m | Material Conductivity = 0.65 S/m
• Tissue Mass Density = 1020.00 kg/m³
• Calculated SAR Result: 0.063725 W/kg | Incident Power Density: 0.265252 W/m²
Example 2: High RF Field Exposure Scenario
• Electric Field RMS (E) = 60.00 V/m | Material Conductivity = 1.20 S/m
• Tissue Mass Density = 1050.00 kg/m³
• Calculated SAR Result: 4.114286 W/kg | Incident Power Density: 9.549072 W/m²

Electromagnetic Field Induction Matrix

The layout illustrates how an uniform time-varying magnetic field induction vector inside biological tissues establishes circular induced current paths and peripheral electric fields (E).

ELECTRIC FIELD E(t) E(t) E(t) current I(t) MAGNETIC FIELD B1(t) uniform vector field directed into paper and increasing: B1(t) = B1 cos(ωt) Conductive loop in tissue with area A

Formulas & Mathematical Logic

Specific Absorption Rate (SAR Formulation):
SAR = σ × E² / ρ
Incident Power Density (IPD Formulation):
IPD = E² / 377

Where E represents the baseline Electric field RMS scale profile, σ establishes localized Material Conductivity thresholds, and ρ tracks tissue Mass Density bounds.

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About this tool

Specific Absorption Rate (SAR) Calculator is a free online calculator tool. Use it to get instant, accurate results for your electronics calculations.