# 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.

Calculate wavelength for a known frequency (Free Space) | ||||
---|---|---|---|---|

MHz | λ (m) | |||

Calculate VSWR from Forward and Reverse Power | ||||

Forward Power (W) | VSWR | |||

Reverse Power (W) | ||||

Forward Power (dBm) | VSWR | |||

Reverse Power (dBm) | ||||

Calculate radiated magnetic field from a loop antenna (Low frequency, Close proximity) | ||||

dBuA/m | ||||

Loop Antenna Diameter (m) | pT | |||

Loop Antenna Windings (N) | dBpT | |||

Current into Loop Antenna (A) | Tesla | |||

Distance from Loop Antenna (m) | Guass | |||

A/m | ||||

Calculate Power Density & Field Level (Far Field) | ||||

Power into Antenna (W) | W/m^2 | |||

Antenna Gain (dBi) | dBuV/m | |||

Distance from Antenna (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) | W | |||

Antenna Gain (dBi) | ||||

Distance from Antenna (m) | ||||

Calculate Circular Waveguide Attenuation | ||||

Frequency (MHz) | dB | |||

Diameter (mm) | ||||

Length (mm) | ||||

Calculate Gain from Antenna Factor (50 Ω system) | ||||

Antenna Factor (dB/m) | dBi | |||

Frequency (MHz) | ||||

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/m^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 | dBuV | |||

Convert dBuV to dBm (50 Ω system) | ||||

dBuV | dBm |

Try our other EMC related calculator pages:

**Radiated Power Calculator:**Convert between radiated RF power units including: ERP, EIRP, dBuV/m, dBm & mW**Field Strength Calculator:**Convert between various radiated RF field units including: V/m, dBuV/m, dBuA/m, pT, dBpT, Tesla, Guass, A/m, mW/cm^2 & W/m^2

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