Professional Antenna Calculators
for Amateur Radio
10,000+
Antennas Designed
2
Professional Calculators
99.9%
Calculation Accuracy
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Always Free to Use
Why Choose HamCalc?
Accurate Calculations
Proven formulas from AA5TB, ARRL Antenna Book, and IEEE standards. Calculate efficiency, Q-factor, bandwidth, and more with professional-grade accuracy.
Educational Content
Learn antenna theory with comprehensive guides. Understand the physics behind your designs with worked examples and detailed explanations.
Instant Results
Real-time calculations as you type. Interactive charts, downloadable reports, and shareable designs. Export to CSV or PDF for documentation.
Most Popular
Magnetic Loop Antenna Calculator
Design small transmitting loop antennas for HF bands with professional-grade accuracy. Calculate efficiency, Q-factor, bandwidth, and more with real-time interactive charts.
- Antenna efficiency and radiation resistance
- Q-factor and bandwidth calculations
- Near-field radiation and RF safety
All Calculators
Magnetic Loop Antenna Calculator
Design small transmitting loop antennas (magnetic loops) for HF bands. Calculate:
- Antenna efficiency and radiation resistance
- Q-factor and bandwidth
- Tuning capacitance and voltage stress
- Conductor loss and skin effect
- Near-field radiation and safe distances
Dipole Antenna Calculator
Calculate wire lengths for horizontal and inverted vee dipoles on any frequency. Features:
- Precise length calculations with end-effect corrections
- Support for horizontal and inverted vee configurations
- Wire diameter and material considerations
- Impedance estimates and SWR predictions
- Multi-band and frequency sweep analysis
Trusted by Ham Radio Operators
See what the community is saying about HamCalc
"The magnetic loop calculator saved me hours of manual calculations. The real-time charts make it easy to optimize for my QTH constraints."
John K3ABC
Extra Class, 20+ years
"Finally, a dipole calculator that accounts for real-world factors. The educational content helped me understand why the formulas work."
Sarah W2XYZ
General Class, Antenna Enthusiast
"I use HamCalc for all my portable antenna designs. The export features make it perfect for documenting field day setups."
Mike N5DEF
Extra Class, Field Day Coordinator
Learn Antenna Design
Master antenna theory with our comprehensive educational guides. From basic concepts to advanced design trade-offs.
Deep dive into magnetic loop performance: efficiency calculations, Q-factor relationships, and bandwidth trade-offs with worked examples.
Complete guide to the 468 formula, end effects, and practical tuning procedures. Learn to optimize your dipole for best performance.
Essential safety information: FCC exposure limits, safe operating distances, high voltage hazards, and compliance guidelines.
Ready to Design?
Start designing your antenna today with professional-grade calculators trusted by thousands of ham radio operators worldwide.
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