# RF Calculator

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

MHz | λ (m) | ||||||

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

Forward Power (W) | VSWR | ||||||

Reverse Power (W) | |||||||

Forward Power (dBm) | VSWR | ||||||

Reverse Power (dBm) | |||||||

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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) | Gauss | ||||||

A/m | |||||||

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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 | |||||||

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Calculate Power to Generate a Known Field (Far Field) | |||||||

Required Field (V/m) | W | ||||||

Antenna Gain (dBi) | |||||||

Distance from Antenna (m) | |||||||

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Calculate Circular Waveguide Attenuation | |||||||

Frequency (MHz) | dB | ||||||

Diameter (mm) | |||||||

Length (mm) | |||||||

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

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

Frequency (MHz) | |||||||

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

mW/m^2 | pJ/cm^2 | ||||||

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

pJ/cm^2 | mW/cm^2 | ||||||

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

dBm | W | ||||||

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

W | dBm | ||||||

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

dBm | V | ||||||

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

V | dBm | ||||||

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

dBm | dBuV | ||||||

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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, Gauss, A/m, mW/cm^2 & W/m^2