RF Exposure Calculator

Professional RF exposure safety assessment tool that accurately calculates specific absorption rate (SAR) and incident power density (IPD) values

Bug report

Browser execution mode: Your data is processed in your browser and is not uploaded to the server.

Speed and Stability: Processing speed depends on your device and browser. For large batch work, the desktop version may be more stable.

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If the online tool fails to load or run, try the desktop tool.https://tools.yikeaigc.com/

Tool Usage

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Set the evaluation scenario, enter parameters, then compare SAR and power density with standards.

Calculate from measured electric field, or estimate far-field power density from transmit power, antenna gain, and distance. Parameters, examples, and history stay local.

SAR = sigma x E^2 / rho S = E^2 / 377 FCC / ICNIRP comparison CSV batch calculation

Current settings overview

Input modeElectric field strength

Tissue presetMuscle

Evaluation standardFCC / ICNIRP

Set evaluation scenario

First choose the input method, exposure category, and tissue parameters. Frequency affects MPE power density limits; tissue parameters affect SAR.

Input methodChoose by available data

Tissue presetCan be adjusted manually

Exposure category and limitsAlso show margin in results

Evaluation standardComparable

SAR Assessment SiteLimit Type

FCC SAR LimitW/kg

ICNIRP SAR LimitW/kg

Enter Calculation Parameters

Electric field mode is for existing field meter data; transmit mode is for far-field estimates. You can also paste CSV for batch calculation.

Basic ParametersFrequency is used for power density limits

FrequencyMHz

Conductivity sigmaS/m

Mass Density rhokg/m3

Measured Electric Field InputRMS Value

Electric Field Strength EV/m

IPD is calculated by the plane-wave approximation S = E^2 / 377.

Magnetic Field Strength HA/m, optional

Estimate from transmit parametersFar-Field Free-Space Model

Transmit PowerW

Antenna GaindBi

Evaluation Distancem

Duty Cycle%

Feedline/Matching LossdB

Reflection Coefficient Correctionx

Far-field estimate: S = P x G / (4 x pi x R^2), then derive electric field with E = sqrt(S x 377). Near-field, body coupling, and device enclosure effects require professional measurement or simulation.

Batch CSVOptional, calculate line by line

CSV DataFirst row can be a header

Field order: name, mode, frequency, electricField, conductivity, density, power, gain, distance, dutyCycle, cableLoss, reflection.

Results & Export

After calculating, view SAR, IPD, MPE ratios, and recommendations. History can restore parameters or export a CSV report.

Output ActionsCalculate before downloading report

Batch ResultsNo batch data

Name	Mode	Frequency (MHz)	E(V/m)	SAR(W/kg)	IPD(mW/cm2)	FCC Margin	ICNIRP Margin

Waiting for batch calculationPaste CSV data in the previous step, then click “Calculate RF Exposure”.

HistoryKeeps latest 20

Time	Mode	Frequency	E	SAR	IPD	Evaluation	Actions

No historyAfter calculation, results are saved to local history automatically.

Live Preview

FCC SAR Ratio-

ICNIRP SAR Ratio-

SAR-W/kg

IPD-mW/cm2

Electric field strength-V/m

Power Density-W/m2

Waiting Complete scenario setup and parameter input before calculating.

This tool is for engineering estimates and parameter comparison. For compliance certification, product launch, or exposure assessment, refer to the standards, test lab data, and professional judgment.

Instructions

Software Usage Instructions

Set the evaluation scenario: Choose either measured electric field strength or transmit-parameter estimation mode, and select tissue presets such as muscle, brain, skin, or fat.
Select evaluation standards: You can compare against both FCC and ICNIRP limits at the same time, choose only one standard, or enter a custom SAR limit.
Enter basic parameters: Fill in parameters such as frequency, conductivity, and mass density; tissue presets automatically populate common parameters, which can still be manually modified.
Enter exposure data:
- Measured electric field mode: Enter the RMS electric field strength; the magnetic field strength can be left blank.
- Transmit estimation mode: Enter parameters such as transmit power, antenna gain, evaluation distance, duty cycle, and feeder loss.
Batch calculation: You can paste CSV data to calculate multiple scenarios by row; the interface displays the first 20 entries, while exports include all results.
Calculate and export: Click “Calculate RF Exposure” to view SAR, IPD, MPE percentage, standard margin, and evaluation notes. You can download a CSV report or copy the summary.
Save settings: Click “Save Settings” to retain commonly used parameters for future evaluations.

FAQ

A: SAR represents the rate at which tissue absorbs RF energy, measured in W/kg; IPD represents incident power density, measured in mW/cm²; MPE represents the maximum permissible exposure limit and is commonly used in RF safety evaluations.

A: If you have measurement data from a field strength meter, measured electric field mode is recommended; if you only have engineering parameters such as transmit power, antenna gain, and distance, use transmit estimation mode for far-field approximate calculations.

A: Yes. Presets automatically fill in conductivity and mass density, and users can continue to adjust them manually based on the test frequency band, reference data, or project requirements.

A: They differ in applicable regions, evaluation criteria, and limit settings. The tool calculates the SAR ratio and MPE ratio separately for comparison against different standard requirements.

A: First check the input parameters, units, and frequency range. Then consider reducing transmit power, increasing the evaluation distance, adjusting antenna direction, or performing professional testing and simulation analysis.

A: They are suitable for solution estimation, distance screening, and parameter comparison. Near fields, human body coupling, enclosure structures, and complex environments may introduce deviations, so compliance conclusions should still be based on test data and standard methods.