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# EMC & RF Calculator

Conversion, Equations and Calculations for EMC & Radio testing

## EMC & RF Testing Conversions & Calculators

EMC testing and wireless radio testing use many equations, formulae and conversions. Here are some online free calculators that should make things easier.

## Radiated Power & Electric Field Strength calculator

This calculator allows easy conversion of common measurement units such electric field strength to radiated power including the following:

• dBuV/m at 3m or dBuV/m at 10m to EiRP (mW) or EiRP (dBm)
• dBuV/m at 3m or dBuV/m at 10m to ERP (mw) or ERP (dBm)
• EiRP (mW), EiRP (dBm), to dBuV/m at 3m or dBuV/m at 10m
• ERP (mw) or ERP (dBm) to dBuV/m at 3m or dBuV/m at 10m
• EiRP (mW) or EiRP (dBm) to ERP (mw) or ERP (dBm)

These conversions can be very useful when comparing FCC dBuV/m electric field strength measurements to radio standards such as AS/NZS 4268, allowing easy comparison against the limits that may be defined in terms of EiRP (mW).

Radiated Power Calculator: ERP, EIRP & dBuV/m

### 12. dBuV/m @ 10m - Part 2

Radiated Power Calculator: ERP, EIRP & dBuV/m - Mobile

## General RF Calculators (50Ω System)

50 Ohm system RF calculator

dBuV
dBm

dBm
dBuV

dBuA
dBm

dBm
dBuA

dBuV
dBuA

dBuA
dBuV

## Antenna equations & Radiated Fields

Frequency to Wavelength, antenna factor to antenna gain and radiated field conversions.

Antenna Equations

MHz
λ (m)

MHz
m

MHz
m
m

MHz
dBi
dB/m

MHz
dB/m
dBi

MHz
G
dB/m

MHz
G
dB/m

### Radiated field - dBuV/m to V/m

Free space conditions (impedance of 377 Ohms)
dBu/m
V/m

### Radiated field - V/m to dBuV/m

Free space conditions (impedance of 377 Ohms)
V/m
dBuV/m

### Radiated field - dBuA/m to A/m

Free space conditions (impedance of 377 Ohms)
V/m
dBuV/m

### Radiated field - A/m to dBuA/m

Free space conditions (impedance of 377 Ohms)
V/m
dBuV/m
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