Antenna Calculators
Professional-grade antenna design tools for amateur radio operators. Free, accurate, and backed by well-established formulas from trusted sources.
Features:
- Efficiency and Q-factor calculation
- Capacitor voltage stress analysis
- Multiple loop shapes (circle, square, octagon)
- Performance charts and diagrams
- RF safety estimates
Features:
- Horizontal and inverted vee configurations
- End-effect and height corrections
- Feedpoint impedance estimates
- SWR bandwidth calculation
- Interactive antenna diagrams
Why Use HamCalc?
Accurate Formulas
Based on established references from AA5TB, 66pacific, M0UKD, and the ARRL Antenna Book. All formulas are documented and cross-validated.
Real-Time Results
Instant calculations as you adjust parameters. No page reloads, no waiting. All processing happens in your browser for maximum speed and privacy.
Visual Feedback
Interactive diagrams, performance charts, and comprehensive output displays help you understand your antenna design at a glance.
Getting Started
New to antenna design? Our calculators make it easy to get started:
- Choose a calculator based on your needs and available space
- Select a preset design or enter your own parameters
- Review the results including dimensions, performance metrics, and warnings
- Export a build pack with materials list and assembly instructions
- Build and tune your antenna following the provided guidelines
Each calculator includes detailed explanations, safety warnings, and tuning instructions to help ensure your success.
More Calculators Coming Soon
We are actively developing additional antenna calculators. Future additions will include:
Ready to Design?
Pick a calculator above and start designing your next antenna project.