Coil64 (Coil32) - freeware coil inductance calculating app.
Site news...
- The cross-platform 64-bit version Coil64 v2.4.39 is now available. See more about Coil64...
- There are versions Coil64 for 32-bit & 64-bit Windows, Mac-OS and 64-bit Linux - DOWNLOAD NOW!
The new version (published 2026-01-31) Coil64 v2.4.39 features:
- Added calculation of the metal detector DD-coil.
- Added calculation of mutual inductance of two coaxial coupled single-layer coils;
- Added calculation of an air core coil with a tap;
- Fixed errors in calculating the multilayer coils;
- Improved program interface;
- Added calculation of multilayer sectioned coil;
Our new web-project - antenna design & online calculators:
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- DL6WU Yagi-Uda antenna online calculator, with ability to export results to *.nec file for 4NEC2 program;
- Gamma matching online calculator;
- Moxon Antenna Calculator with Model Export, based on Cebik (W4RNL) formulas. You can export a standard NEC model file for loading into EZNEC, xnec2c, etc. You can also export the model in a custom 4NEC2 format that includes variables, or in an MMANA model file.
Here are the new online calculators:
"Coil64" is a free coil inductor calculator, that allows calculating: single-layer and multilayer air core inductors, toroidal air core coil inductance, inductors on ferrite rings, in pot core, flat coils on the PCB, and also LC tank parameters. The program has additional plugins to calculate another manner of coils. There are versions for 32 & 64-bit Windows, Linux, MacOS & Android platforms.
Program is multilingual
Now available languages:| Bulgarian | Chinese | Croatian |
| Czech | Dutch | English |
| Estonian | Farsi | French |
| German | Greek | Hungarian |
| Italian | Lithuanian | Macedonian |
| Polish | Portuguese | Romanian |
| Russian | Serbian | Spanish |
| Turkish | Ukrainian | Vietnamese |
You can add native language yourself. Download end edit a translation file.
The soft is free for usage and distributing.
I hope, that this small application will help for radio-hobbyists to calculate various inductors.
This software allows to calculate the following species of inductors:
In all variants, that are below, it's possible to calculate number of turns if inductance is known or inductance if number of turns is known
- Single layer close-winding air core solenoid
As the initial parameters you can choose two options:- The former diameter and the wire diameter are known, the length of the winding is to be calculated.
- The former diameter and the winding length are known, the wire diameter is to be calculated.
- Single layer RF solenoid with winding pitch
- Single layer RF solenoid winding with rectangular cross-section wire
- Single layer RF solenoid with pitch, but non-circular winding
- Multi-layer air core inductor
- Multi-layer air core coil with sectional winding
- Multi-layer air core inductor with insulating pads
- Multi-layer air core inductor on a rectangular coil-former
- Multi-layer foil-wound coil
- Coil or choke on a ferrite ring (only for low-current RF circuits)
- The planar PCB coil
- Tesla flat spiral coil
- The software has additional modules that allow to calculate:
- flat PCB coil with the meander form of turns;
- search coil for a metal detector (O-shaped & D-shaped winding);
- a single triangle, rectangle or round loop coil;
- air core toroid coil with round & rectangular cross-section;
- estimate influence of the shield on the value of coil inductance;
- ferrite rod core inductor;
- coil or choke in the pot core (ferrite or powder iron);
- coil on the ferrite E-core;
- coil on the ferrite U-core;
- coil on the ferrite RM-core;
- finding unknown permeability of a ferrite ring;
- recalculate any coil with ferrite or iron core by determining its AL factor;
- Amidon™ cores - iron powdered & ferrite toroids, Pot-shaped , E-shaped & multi-aperture ferrite cores;
- An optimal multilayer coil for the audio system filter (crossover);
- A ferrite toroid inductor at the radio frequencies with Q-factor & self-capacitance calculations;
- Bandspread capacitors calculation;
- Calculator of mutual inductance of two coaxial coupled single-layer coils and tapped air core coil
In what of an advantage of this software before analogs?
- The program calculates the inductance of different species of inductor design. It is possible to select an optimal variant, to use available coil-former or recalculate inductor to other dimensions.
- Coil64 allows to estimate Q-factor, self-resonant frequency and self-capacitance of RF single layer air core inductor.
- Coil64 allows to estimate Q-factor and self-capacitance of a ferrite toroidal inductor at the radio-frequencies.
- It's possible to estimate the length of wire what needed to wind one layer, multilayer coil and the coil on a ferrite ring.
- Results of all calculations are deduced in a common text box, from where they can be saved in a file or print out.
- For flat coil inductors on the PCB, the program prompts the optimal sizes for highest Q-factor.
- It's possible to use metric or inches as units of measurements.
- AWG or metric wire gauge support.
- The program is freeware.
- Multilingual interface support.
- The soft is multiplatform. There are versions for Windows, Linux, MacOS & Android.
