### RF Calculator: Wavelength, dBm, dBuV, W, dBuV/m, mW/cm^2, pJ/cm^2, V & VSWR

This RF calculator has been developed by Compliance Engineering as a resource for individuals involved in EMC and RF compliance measurements.

The following table provides conversions for wavelength (from frequency), VSWR (from forward and reflected power) and various other useful conversions.

#### RF Calculator

Calculate wavelength for a known frequency (Free Space)
MHz
λ (m)

Calculate VSWR from Forward and Reverse Power
Forward Power (W)
Reverse Power (W)
VSWR
Forward Power (dBm)
Reverse Power (dBm)
VSWR

Calculate radiated magnetic field from a loop antenna (Low frequency, Close proximity)
Loop Antenna Diameter (m)
Loop Antenna Windings (N)
Current into Loop Antenna (A)
Distance from Loop Antenna (m)
dBuA/m
pT
dBpT
Tesla
Guass
A/m

Calculate Power Density & Field Level (Far Field)
Power into Antenna (W)
Antenna Gain (dBi)
Distance from Antenna (m)
W/m^2
dBuV/m
V/m
A/m
V^2/m^2
A^2/m^2
mW/cm^2

Calculate Power to Generate a Known Field (Far Field)
Required Field (V/m)
Antenna Gain (dBi)
Distance from Antenna (m)
W

Calculate Circular Waveguide Attenuation
Frequency (MHz)
Diameter (mm)
Length (mm)
dB

Calculate Gain from Antenna Factor (50 Ω system)
Antenna Factor (dB/m)
Frequency (MHz)
dBi

Convert mW/cm^2 to pJ/cm^2 (Free Space)
mW/m^2
pJ/cm^2

Convert pJ/cm^2 to mW/cm^2 (Free Space)
pJ/cm^2
mW/cm^2

Convert dBm to W (50 Ω system)
dBm
W

Convert W to dBm (50 Ω system)
W
dBm

Convert dBm to V (50 Ω system)
dBm
V

Convert V to dBm (50 Ω system)
V
dBm

Convert dBm to dBuV (50 Ω system)
dBm
dBmV

Convert dBuV to dBm (50 Ω system)
dBuV
dBm

Try our other EMC related calculator pages: