Antenna trim correction
Adjust an existing element length from its measured resonance to a target frequency.
New estimated length--
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Antenna Trim Correction Calculator
Estimate a corrected antenna element length from measured and target resonant frequencies.
About this calculator
How to use it
Enter measured resonance, target frequency and current element length to estimate the required length change.
Understanding the result
Trim in small equal steps and re-measure with the antenna installed. Cutting is irreversible and surrounding objects can move resonance.
More ham radio calculators
Use this calculator as a practical starting point. Check critical radio, electrical and installation work with suitable test equipment and current licence requirements.