Site exists (English version) -

Coil32 - freeware
coil inductance

Site news...

New version Coil32 v is now available.

  • Multilayer coils are calculated by numerical method with Maxwell's formula.
  • One-layer coils are calculated by Robert Weaver numerical method.
  • Several bugs in program was fixed, also input fields errors.
  • Calculation of coil inductance on a ferrite rod core was updated

Coil32 for Android v2.0 is available.

Linux version of the program is now available

Metric or imperial units, metric wire gauge or AWG selection.

Available plugins:

  • Calculation of ferrite ring permeability - Calculate permeability of unknown ferrite ring by winding some testing turns and measuring inductance and ring dimensions
  • meandr_PCBv0.3 - Calculation of flat PCB coil with meander form of turns
  • square_loop - Inductor as a single square frame
  • screen - Estimate influence of the shield on the value of coil inductance
  • multiloop - Calculate inductance of multi-winding round loop with round cross-section
  • Ferrite - Inductance of a solenoid with ferrite rod core.

On the site there is an opportunity to use online calculators for single-layer, multilayer, pancake coils etc...

About Coil32 ...

Program is multilingual. Now available languages:

  • Bulgarian
  • Croatian
  • English
  • French
  • Polish
  • Russian
  • Serbian
  • Spanish

The program is free for usage and distributing.
I hope, that this small application will help for radio-amateurs to calculate various inductors. At last version Coil32 v are available:

  • Number of turns calculation under given inductance
  • Inductance of coil calculation under given number of turns and coil design sizes
  • Q-factor of air core one-layer coil inductance estimation
  • Inductance of multilayer coil estimate by it resistance to DC
  • Estimate length of wire, that necessary to wind a one-layer coil inductance
  • Estimate length of wire, that necessary to wind a multilayer coil inductance
  • Estimate length of wire, that necessary to wind coil on a ferrite ring

This software allows to calculate the following kinds of coils:

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
  • RF air core inductor as single turn loop
  • Single layer close-winding air core solenoid
    Before calculation in initial parameters you can choose two variants:
    1. Diameter of a core and diameter of a wire are fixed, the length of winding is in passing defined.
    2. Diameter of a core and length of winding are fixed, diameter of a wire is in passing defined.
  • Single layer RF solenoid with winding pitch
  • Single layer RF solenoid with pitch, but not the circular shape turns
  • Multilayer air core coil inductance
    Before calculation in initial parameters you can choose two variants:
    1. Length, thickness of winding and diameter of wire are known. Number of turns is calculating, the thickness of the coil, its ohmic resistance to a DC and approximate length of a wire for winding (how much it is necessary to cut off) is in passing estimated.
    2. Diameter of a core, length of winding and limiting ohmic resistance of the coil are known. The number of turns is calculating, a thickness of the coil, the necessary minimum diameter of a wire and approximate length of a wire for winding is in passing estimated.
  • Toroidal air core one-layer coil inductance
  • Coil or choke on a ferrite ring
  • Coil or choke in the pot core (ferrite or powder iron)
  • The planar coil (Flat coil on PCB with spiral round and square form of turns and as a single straight conductor)

About Coil32 in detail ...

Often enough the radio-amateur have a question: " How to make coil inductance and calculate number of turns?". Coil inductors are using and in HAM radio frequency equipment, and at construction of loudspeaker systems, and even looking at the computer motherboard, you and there find out the inductive elements. By Coil32 application it is possible quickly to compute inductance of coil. In the program the most widespread variants geometries of coils are considered. It is possible to calculate air core coil in the form of a single loop, air core solenoid with different variants of winding, choke on ferrite rings and in pot cores, and also the flat printing coil with the round and square form of turns. For the calculated coil it is possible to calculate condenser capacitance at LC resonance.

In what of advantage of this software before analogues?

  • The program calculates inductance of many kinds of coil design. It is possible to select an optimal variant, to use available coil-former or recalculate any coil inductor to another dimensions
  • Coil32 allows to compute Q-factor of RF single layer coils inductance approximately
  • It's possible to estimate 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. Further you can view them and not to recompute again. It is possible to open this file in "MS Word" and to print out.
  • For flat coil inductors on the PCB the program prompts the optimal sizes for achievement of the highest Q-factor.
  • In the Network often there are programs for calculation of coils inductance working under DOS, about advantages of the Windows-interface, think, it is not necessary to speak.
  • It is possible to develop additional plugins for the program to calculate different kind of coils and chokes.
  • The program is free download
  • Multilingual interface support
  • Offline calculations with save of result

The program is portable and does not have installer. To install program unpack zip archive to any folder and send link of "Coil32.exe" on your desktop.

If you wish to add to the program your own language, please translate himself the file "English.lng" in folder "Language" and save the target file in this folder with name -  "Mylanguage.lng". This file with ".lng" extension is the simple text-file. Replace this extension to ".txt", translate it (only words after equal sign), and replace extension back to ".lng" In the next start of the program this language will be available in menu. To make available this file to another users you can send this file to the developer on E-mail and I will include it in a next version.

About all wishes and remarks the request to write to program developer on E-mail: or on program site:

Orphus system

Используются технологии uCoz