RF & Microwave Calculator

A free, professional toolkit of RF engineering calculators covering free-space path loss, VSWR and impedance matching, link budgets, microstrip PCB design, Fresnel zone clearance, wavelength conversion, skin depth, power-unit conversion, and antenna radiation patterns. Every tool uses industry-standard formulas — Friis for path loss, Hammerstad-Jensen for microstrip impedance, and the standard skin-effect and reflection-coefficient equations — so the results are accurate enough for first-pass design, classroom study, and field troubleshooting. All nine calculators run instantly in your browser, support metric and imperial units where relevant, and require no signup, making them well suited to RF engineers, amateur radio operators, IoT and wireless developers, and students. Pick a calculator below to get started.

Professional RF engineering toolkit for wireless design. Calculate path loss (FSPL), VSWR, link budgets, microstrip impedance, and antenna patterns. Free accurate tools for RF engineers, ham radio operators, and students.