Calculate inductance using Wheeler's Formula
Converted to inches internally for Wheeler's equation.
In electronics and radio frequency (RF) design, an air core inductor is a coil of wire that does not rely on a ferromagnetic core (like iron or ferrite) to concentrate its magnetic field. These inductors are highly prized in high-frequency applications, such as radio transmitters and receivers, because they do not suffer from "core losses" or magnetic saturation. However, predicting their exact electrical inductance requires precise mathematical modeling.
Our Air Core Inductor Calculator utilizes the industry-standard Wheeler's Formula for single-layer coils. The traditional formula is L (µH) = (r² * N²) / (9r + 10l), where 'r' is the radius in inches, 'l' is the length in inches, and 'N' is the number of turns. To make it universally accessible, our tool allows you to input measurements in standard Centimeters (cm). The algorithm handles the imperial conversions in the background and instantly outputs the precise microhenry (µH) value, ensuring your filter circuits and oscillators are tuned perfectly.
AI-generated estimates. No guarantee of accuracy. We assume no liability for decisions based on these results. Independent verification is recommended.