RF Calculator Resource Center

Use these RF, microwave, and millimeter-wave calculators for fast engineering estimates related to power conversion, voltage and current, impedance matching, antenna performance, propagation, link budgets, noise figure, frequency conversion, phase shift, and more.

This calculator hub is designed for engineers, system designers, test teams, and technical buyers who need quick reference tools for early-stage planning and day-to-day RF analysis.

Unit Conversion Calculators

Quick RF unit conversion tools for power, frequency, wavelength, and field reference values commonly used in RF and microwave design.

dBm to Watts

Convert RF power from dBm to watts.

Watts to dBm

Convert RF power from watts to dBm.

Frequency to Wavelength

Convert frequency in GHz into free-space wavelength.

GHz to MHz

Convert GHz to MHz for quick IF and RF planning.

Power, Voltage & Current Calculators

Use these calculators to estimate RMS voltage, current, total output level, power density relationships, and attenuation effects in standard RF systems.

Voltage from Power and Impedance

Calculate RMS voltage from RF power and load impedance.

Current from Power and Impedance

Calculate RMS current from power and load impedance.

Cascaded Gain or Loss

Estimate output level after up to four gain or loss stages.

Attenuator Output Level

Find the output level after a fixed attenuator.

Matching, VSWR & Return Loss Calculators

Evaluate mismatch behavior using return loss, VSWR, reflection coefficient, reflected power percentage, and mismatch loss.

Return Loss to VSWR

Convert return loss in dB to VSWR.

VSWR to Return Loss

Convert VSWR to return loss.

Reflection Coefficient

Calculate reflection coefficient magnitude from VSWR.

Mismatch Loss

Estimate mismatch loss from VSWR.

Reflected Power Percentage

Estimate the percent of incident power reflected due to mismatch.

Antenna & Propagation Calculators

Estimate antenna gain, beamwidth, free-space path loss, EIRP, and required reflector diameter for a target gain.

Antenna Gain from Diameter

Estimate parabolic antenna gain from diameter, frequency, and efficiency.

Approximate Beamwidth

Estimate reflector 3 dB beamwidth using 70λ/D.

Free Space Path Loss

Calculate line-of-sight free space path loss.

EIRP Calculator

Estimate equivalent isotropically radiated power.

Required Dish Diameter for Target Gain

Estimate reflector diameter required to reach a target gain.

Amplifier & Linearity Calculators

Use these amplifier tools for cascade noise figure, compression headroom, intercept point conversion, intermodulation estimates, and gain planning.

Friis Cascade Noise Figure

Estimate total cascade noise figure using a three-stage Friis model.

P1dB Headroom

Estimate output compression headroom.

IIP3 to OIP3

Convert input intercept point to output intercept point.

IM3 Product Level

Estimate third-order intermodulation product level.

Noise Temperature from NF

Convert noise figure to equivalent noise temperature.

Frequency Conversion Calculators

Plan RF, IF, and LO relationships for upconversion, downconversion, image frequency analysis, and output level estimates through converter stages.

Upconverter or Downconverter Output

Calculate sum or difference frequency products.

Image Frequency

Estimate image frequency for superheterodyne systems.

Output Level with Conversion Gain or Loss

Estimate output level after a frequency converter stage.

LO Frequency from RF and IF

Calculate the LO needed for high-side or low-side mixing.

Transmission Line & Timing Calculators

Use these tools for coax delay, guided phase shift, electrical length, and basic transmission timing calculations.

Coax Delay from Length

Estimate propagation delay through a cable using velocity factor.

Phase Shift from Line Length

Estimate phase shift through a transmission line.

Electrical Length

Estimate electrical length in degrees for a transmission line.