Electrical calculators
RF & Microwave Calculators
13 tools
RF link, transmission-line, impedance, matching, and microwave tools.
Popular in RF & Microwave
Featured tools from the Family registry.
- Smith Chart Calculator Interactive impedance Smith chart with auto-match, drag-to-tune, L·C·R / T-line / stub / transformer / ‖RLC, Custom Z(f), f-locus, and Touchstone S11/S21 with stability overlays. Runs locally in your browser.
- Free-Space Path Loss Calculator Compute free-space path loss FSPL = 20·log10(d·f) + 20·log10(4π/c) from distance and frequency, with optional antenna gains. Runs locally in your browser.
- VSWR Calculator Convert between reflection coefficient |Γ|, VSWR, and return loss. Runs locally in your browser.
- RF Link Budget Calculator Compute RF link budget: FSPL, path loss with antenna gains and misc loss, received power, and optional margin above sensitivity. Extends Free-Space Path Loss.
All RF & Microwave
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- Antenna Length Calculator Compute dipole (λ/2) or monopole (λ/4) antenna length from frequency and an empirical length factor. Runs locally in your browser.
- Cascaded Noise Figure Calculator Compute cascaded noise figure and total gain for a multi-stage RF chain using the Friis formula. Add, remove, or reorder stages. Runs locally in your browser.
- Coax Impedance Calculator Compute coaxial characteristic impedance Z0 from shield inner diameter D, center-conductor diameter d, and dielectric εr. Ideal TEM, μr≈1. Runs locally in your browser.
- dBm to Watts Calculator Convert dBm ↔ watts and dBm ↔ milliwatts with hard validation. Canonical Unit Engine for RF power.
- Free-Space Path Loss Calculator Compute free-space path loss FSPL = 20·log10(d·f) + 20·log10(4π/c) from distance and frequency, with optional antenna gains. Runs locally in your browser.
- L-section LC Match Calculator Narrowband real RL→Z0 L-section match with dual LP/HP solutions. Runs locally in your browser.
- Receiver Sensitivity Calculator Estimate MDS: S = −174 + NF + 10·log10(BW) + SNR_min (dBm). Runs locally in your browser.
- Reflection Coefficient to Impedance Calculator Convert complex Γ ↔ normalized z (Cartesian or polar Γ). Reports VSWR and return loss. Runs locally in your browser.
- RF Link Budget Calculator Compute RF link budget: FSPL, path loss with antenna gains and misc loss, received power, and optional margin above sensitivity. Extends Free-Space Path Loss.
- RLC Resonance Calculator Calculate RLC resonant frequency f₀, Q factor, bandwidth, and reactance at resonance for series or parallel circuits from L, C, and R. Runs locally in your browser.
- Skin Depth Calculator Compute electromagnetic skin depth δ = √(ρ/(π·f·μ)) for conductors. Runs locally in your browser.
- Smith Chart Calculator Interactive impedance Smith chart with auto-match, drag-to-tune, L·C·R / T-line / stub / transformer / ‖RLC, Custom Z(f), f-locus, and Touchstone S11/S21 with stability overlays. Runs locally in your browser.
- VSWR Calculator Convert between reflection coefficient |Γ|, VSWR, and return loss. Runs locally in your browser.