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Preview
µH
Coil inductance calculator
Planar, conical or cylindrical coils, excluding connection leads. Up to 20 turns, drag START/END on the drawing. Above 20 turns the whole coil is calculated. A valid turn-count change resets START/END to the complete coil.
Single-layer circular PCB · 10 kHz. Radial pitch = trace width + radial gap; the gap is a radial design value, not the minimum spatial edge distance. Nominal copper weight conversion: 1 oz ≈ 0.035 mm. Gold finish is visual only; the model remains copper. Mesh convergence and input limits are not measured-accuracy or manufacturing guarantees.
Previous valid geometry preview — not the current inputs. Interaction and calculation are disabled until the inputs are valid.
High-turn fast mode
Above 20 turns the entire physical coil is used, START=0 and END=N. Resolvable windings use a continuous centerline; denser windings use a shape-matched envelope, with dimensions retained below.
- Inner centerline diameter
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- Outer centerline diameter
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