// Calculators
RF Calculators
22 accurate, browser-based RF engineering calculators. No signup, no install, no ads.
Transmission Lines
LIVE
Microstrip
Trace width ↔ Z₀, εeff, λ and attenuation.
LIVEStripline
Buried trace Z₀, wavelength and attenuation.
LIVECoaxial Line
Z₀, C/L per metre, TE₁₁ cutoff and cable presets.
LIVECPW / CPWG
Coplanar waveguide Z₀ and εeff, with or without ground.
LIVETwo-Wire Line
Twin-lead and open-wire feeder Z₀ and wavelength.
LIVERectangular Waveguide
TE/TM cutoff, guide wavelength and wave impedance.
NEWDifferential Pair
Zdiff, Zodd, Zeven for edge-coupled microstrip and broadside stripline.
NEWVia Inductance
PCB via inductance, anti-pad capacitance, SRF and impedance vs frequency. Essential for RF PCB design above 1 GHz.
Signal & Power
NEW
RX Chain Designer
Cascaded NF, IIP3, P1dB, sensitivity, dynamic range and SFDR with per-stage compression warnings.
LIVEAttenuator
Pi and T pad — attenuation ↔ resistor values.
LIVELC Filter Design
Butterworth, Chebyshev, Bessel — LP/HP/BP/BS.
LIVELC Resonator
f₀, Q, bandwidth, coupling and insertion loss.
LIVESkin Depth
δs and Rs for copper, gold, silver and custom metals.
NEWFree Space Path Loss
FSPL, received power, max range and link margin — Friis equation with 8 presets and distance chart.
LIVERF Link Budget
EIRP, path loss, received power, SNR and link margin.
Converters & Reference
NEW
RF Unit Converter
Frequency, power, field strength, noise temp, wavelength and length — all RF units in one place.
LIVEVSWR / Return Loss
Convert VSWR ↔ return loss ↔ |Γ| ↔ mismatch loss.
LIVEdB / Power Converter
dBm ↔ dBW ↔ watts ↔ mW ↔ Vrms ↔ gain ratio.
LIVEΓ Reflection Coefficient
Complex Γ, VSWR, return loss and mismatch loss.