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===== Calculator of inductance from AL value and number of turns =====

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|  {{/calculator/icon_calc.png?60&nolink}}  | //[[user/Stan Zurek]], Calculator of inductance from AL value and number of turns, Encyclopedia Magnetica//, \\ https://www.e-magnetica.pl/doku.php/calculator/inductance_from_al_value_and_number_of_turns, {accessed: @YEAR@-@MONTH@-@DAY@} |
|  {{/wiki/logo.png?20&nolink}} //See more: [[/Calculators of inductance]]//  ||
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If [[/AL value]] is known then the inductance can be calculated as: 

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^  [[/Inductance]] from [[/AL value]] and [[/number of turns]]  ^^^
| //Source: [1] [[https://isbnsearch.org/isbn/9783899291575|Thomas Brandner, Alexander Gerfer, Bernhard Rall, Heinz Zenkner, Trilogy of Magnetics: Design Guide for EMI filter design, SMP & RF circuits, 5th Edition, Würth Elektronik eiSos GmbH & Co. KG, 2018, Künzelsau, ISBN 9783899291575]]  //  |||
|  //[1], eq. (1.34), p. 38 //  |  $$ L = A_L ⋅ N^2 $$  |  (H)  |


<HTML>
<!-- ==================== calculator starts here ============== -->
<HEAD>
<SCRIPT Language="JavaScript">

<!--
/**
 * Function that introduces calculator of a given function.
 **/
 
function getSelectedValue(selectList){
   return selectList[selectList.selectedIndex].value
}

function calculate_function(frm){
// set up variables
var al          = frm.al.value
var turns       = frm.turns.value
var result      = "0"
var al_unit     = getSelectedValue(frm.al_unit)
var result_unit = getSelectedValue(frm.result_unit)

// read values and convert to numbers
al = parseFloat(al)
al_unit = parseFloat(al_unit)
turns = parseFloat(turns)
result_unit = parseFloat(result_unit)

// calculate the main function
result = al * al_unit * turns * turns / result_unit

// format number to x digits precision, result will equal 5.611e+2
result = result.toPrecision(4)

// display result
frm.result.value = result

}

//-->
</SCRIPT>
</HEAD>
<body>

<form method="post" action="">
 
<i>A<sub>L</sub></i> value = <input type="text" value="1000" name="al" size="10" maxlength="10" onChange="calculate_function(this.form)"> 
 
          <SELECT name="al_unit" onChange="calculate_function(this.form)">
           <OPTION value="1e-9">(nH/t&sup2;)</OPTION>
           <OPTION value="1e-6">(&mu;H/t&sup2;)</OPTION>
           <OPTION value="1e-3">(mH/t&sup2;)</OPTION>
           <OPTION value="1">(H/t&sup2;)</OPTION>
        </SELECT> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
 
number of turns <i>N</i> = <input type="text" value="10" name="turns" size="10" maxlength="10" onChange="calculate_function(this.form)"> (unitless) <br><br>

<input type="button" name="Button" value="Calculate" onClick="calculate_function(this.form)"> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

<b><i>L</i></b>= <input type="text" name="result" size="10" maxlength="10"> 
 
           <SELECT name="result_unit" onChange="calculate_function(this.form)">
           <OPTION value="1e-9">(nH)</OPTION>
           <OPTION value="1e-6" selected>(&mu;H)</OPTION>
           <OPTION value="1e-3">(mH)</OPTION>
           <OPTION value="1">(H)</OPTION>
        </SELECT><br>
 </form>
 

</BODY>
<!-- ==================== calculator ends here ============== -->
</HTML>
 \\ 
//Note: the AL value is typically specified just in the units of inductance e.g. (nH), without the square turns. If this is the case just select the corresponding unit, e.g. (nH/t<sup>2</sup>).//
----
(See also the calculator of **[[calculator/AL value from inductance and number of turns]]**).

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{{tag>Calculators AL_value Number_of_turns Inductance}}