RF & Electronics
Calculator Hub
213 precision calculators for RF, PCB, and system design — Smith Chart, link budget, VSWR, filter design, impedance matching, and more.
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Popular Tools
View all 213 →Smith Chart
Free online Smith Chart calculator. Plot impedance, calculate VSWR, return loss, and reflection coefficient. No signup — instant results, shareable URLs.
Link Budget
Free RF link budget calculator: enter Tx power, antenna gains, frequency, and distance to get received signal level, link margin, and max range. Covers satellite, terrestrial, and IoT links.
VSWR / Return Loss
Convert between VSWR, return loss, reflection coefficient, and mismatch loss instantly. Get reflected and transmitted power percentages. Free, instant results.
Free-Space Path Loss
Calculate free-space path loss (FSPL) in dB using the Friis equation. Enter frequency and distance for wireless link budget analysis. Free, instant results.
Cascaded NF
Calculate cascaded noise figure and IP3 for multi-stage RF receiver chains using the Friis formula. Optimize LNA and filter ordering. Free, instant results.
Microstrip Impedance
Calculate microstrip impedance using Hammerstad-Jensen equations. Get Z0, effective dielectric constant, and propagation delay for PCB trace design. Free, instant results.
Filter Designer
Design passive Butterworth and Chebyshev LC ladder filters up to order 10. Calculate component values for low-pass, high-pass, and band-pass topologies. Free, instant results.
Simulation Tools
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Reference
RF connector specs, frequency band charts, and engineering data tables.
Comparisons
VSWR vs Return Loss, Buck vs Boost, Microstrip vs Stripline — 20 guides.
Engineering Blog
Design guides, worked examples, and tutorials for RF and PCB engineers.
API Access
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