diff --git a/content/post/endless-loop/index.md b/content/post/endless-loop/index.md
index 0b3b01f..d79c988 100644
--- a/content/post/endless-loop/index.md
+++ b/content/post/endless-loop/index.md
@@ -25,4 +25,11 @@ All measurements are in Centimeters.
 {{< splice/calc_loop >}} 
 
 # Instruction video
-{{< youtube uzK0gApBrCg >}}
\ No newline at end of file
+{{< youtube uzK0gApBrCg >}}
+
+
+# Soft Shackle Calculator
+
+All measurements are in Centimeters.
+
+{{< splice/calc_softshackle >}} 
\ No newline at end of file
diff --git a/go.mod b/go.mod
index c962388..844f0a0 100644
--- a/go.mod
+++ b/go.mod
@@ -4,6 +4,6 @@ go 1.15
 
 require (
 	github.com/wowchemy/wowchemy-hugo-modules/v5 v5.3.0
-	github.com/wowchemy/wowchemy-hugo-modules/wowchemy-cms/v5 v5.0.0-20220516185340-aa03201adbf0 // indirect
-	github.com/wowchemy/wowchemy-hugo-modules/wowchemy/v5 v5.0.0-20220516185340-aa03201adbf0 // indirect
+	github.com/wowchemy/wowchemy-hugo-modules/wowchemy-cms/v5 v5.0.0-20220615172938-f347d63546f4 // indirect
+	github.com/wowchemy/wowchemy-hugo-modules/wowchemy/v5 v5.0.0-20220615172938-f347d63546f4 // indirect
 )
diff --git a/go.sum b/go.sum
index 66ad08d..831e56e 100644
--- a/go.sum
+++ b/go.sum
@@ -43,6 +43,8 @@ github.com/wowchemy/wowchemy-hugo-modules/wowchemy-cms/v5 v5.0.0-20220423181119-
 github.com/wowchemy/wowchemy-hugo-modules/wowchemy-cms/v5 v5.0.0-20220423181119-d13358e38fee/go.mod h1:Sp/AKo+2HAPi/IPHp1MEdKPmee+mzO5+efUBUPLPqPE=
 github.com/wowchemy/wowchemy-hugo-modules/wowchemy-cms/v5 v5.0.0-20220516185340-aa03201adbf0 h1:Yo7CGMEujDsPhdxYIdkUGmTpohgAXt6SENW6hp+qOe0=
 github.com/wowchemy/wowchemy-hugo-modules/wowchemy-cms/v5 v5.0.0-20220516185340-aa03201adbf0/go.mod h1:Sp/AKo+2HAPi/IPHp1MEdKPmee+mzO5+efUBUPLPqPE=
+github.com/wowchemy/wowchemy-hugo-modules/wowchemy-cms/v5 v5.0.0-20220615172938-f347d63546f4 h1:LW8jSOSRI9B93RC59h+MZhlN68FGyxILhSQz7ZX7KUs=
+github.com/wowchemy/wowchemy-hugo-modules/wowchemy-cms/v5 v5.0.0-20220615172938-f347d63546f4/go.mod h1:Sp/AKo+2HAPi/IPHp1MEdKPmee+mzO5+efUBUPLPqPE=
 github.com/wowchemy/wowchemy-hugo-modules/wowchemy/v5 v5.0.0-20210629192904-559885af86b7/go.mod h1:2iL9rdrUYyJXX2BeHKfK+QbqZlubCsaR60nQ87NRQTY=
 github.com/wowchemy/wowchemy-hugo-modules/wowchemy/v5 v5.0.0-20210807125257-88ec9270d03e h1:J6H85UfeOzUouIenMxv/+FT1F5XlfzjuZYfMFdRux8Y=
 github.com/wowchemy/wowchemy-hugo-modules/wowchemy/v5 v5.0.0-20210807125257-88ec9270d03e/go.mod h1:2iL9rdrUYyJXX2BeHKfK+QbqZlubCsaR60nQ87NRQTY=
@@ -86,3 +88,5 @@ github.com/wowchemy/wowchemy-hugo-modules/wowchemy/v5 v5.0.0-20220423181119-d133
 github.com/wowchemy/wowchemy-hugo-modules/wowchemy/v5 v5.0.0-20220423181119-d13358e38fee/go.mod h1:2iL9rdrUYyJXX2BeHKfK+QbqZlubCsaR60nQ87NRQTY=
 github.com/wowchemy/wowchemy-hugo-modules/wowchemy/v5 v5.0.0-20220516185340-aa03201adbf0 h1:vviH4rJbjvCK8xqvEDAseq+JmT2flWKpDvzL2Ub+6Z0=
 github.com/wowchemy/wowchemy-hugo-modules/wowchemy/v5 v5.0.0-20220516185340-aa03201adbf0/go.mod h1:2iL9rdrUYyJXX2BeHKfK+QbqZlubCsaR60nQ87NRQTY=
+github.com/wowchemy/wowchemy-hugo-modules/wowchemy/v5 v5.0.0-20220615172938-f347d63546f4 h1:BpC4/2LYae9PoWZ5HCQx0lZCFeLOOx3wNOmUJ5VYz5U=
+github.com/wowchemy/wowchemy-hugo-modules/wowchemy/v5 v5.0.0-20220615172938-f347d63546f4/go.mod h1:2iL9rdrUYyJXX2BeHKfK+QbqZlubCsaR60nQ87NRQTY=
diff --git a/layouts/shortcodes/splice/calc_loop.html b/layouts/shortcodes/splice/calc_loop.html
index 76f9f83..54fb445 100644
--- a/layouts/shortcodes/splice/calc_loop.html
+++ b/layouts/shortcodes/splice/calc_loop.html
@@ -1,5 +1,5 @@
 <script>
-function Calculate(obj)
+function Calculate_Loop(obj)
 {
     //All calculations in CM
     loop_dia 	  = obj.loop_dia.value;
@@ -22,7 +22,7 @@ function Calculate(obj)
     obj.length_extended.value = length_extended.toFixed(1) +"cm";
 }
 </script>
-<form onsubmit="return false;">
+<form onsubmit="false;">
     <div class="form-group">
         <label for="line_diameter">Line diameter</label>
         <select class="form-control form-control-lg" name="line_diameter" onChange="Calculate(this.form)">
@@ -40,7 +40,7 @@ function Calculate(obj)
         <label for="loop_dia">Loop diameter (in centimeter)</label>
         <input type="number" min="0" step=".1" class="form-control form-control-lg" id="loop_dia" placeholder="Enter loop diameter" onChange="Calculate(this.form)">
 
-        <button type="button" class="btn btn-primary" onClick="Calculate(this.form)">Calculate</button>
+        <button type="button" class="btn btn-primary" onClick="Calculate_Loop(this.form)">Calculate</button>
     </div>
     <hr>
     <div class="form-group">
diff --git a/layouts/shortcodes/splice/calc_softshackle.html b/layouts/shortcodes/splice/calc_softshackle.html
new file mode 100644
index 0000000..9aa6884
--- /dev/null
+++ b/layouts/shortcodes/splice/calc_softshackle.html
@@ -0,0 +1,75 @@
+<script>
+function Calculate_Softshackle(obj)
+{
+    //All calculations in centimeters
+    tail = 53.33 * obj.line_diameter.value;
+	length1 = obj.shackle_length.value;
+	size =  obj.line_diameter.value;
+	body = length1 - 5.56 * size;
+
+    //Strech factor
+	stretch = 1.2;
+	if (size == .2) stretch = 1.1875;
+	if (size == .3) stretch = 1.23;
+	if (size == .4) stretch = 1.23;
+	if (size == .5) stretch = 1.21538;
+	if (size == .6) stretch = 1.2;
+
+    //Calculate
+    var inner_diameter          = body / Math.PI - 1.5 * size;
+    var inner_diameter_streched = inner_diameter * Math.PI / 2;
+	var load_diameter           = (body - 6 * size)  / Math.PI - 1.5 * size;
+	var length                  = 2 * tail+ (1 + stretch)  * body + 5.33* size;
+	var mark1                   = tail;
+	var mark2                   = stretch * body;
+
+
+    //Assign, round and format
+    obj.inner_diameter.value          =  inner_diameter         .toFixed(1) +"cm";
+    obj.inner_diameter_streched.value =  inner_diameter_streched.toFixed(1) +"cm";
+	obj.load_diameter.value           =  load_diameter          .toFixed(1) +"cm";
+    obj.length.value                  =  length                 .toFixed(1) +"cm";
+	obj.mark1.value                   =  mark1                  .toFixed(1) +"cm";
+	obj.mark2.value                   =  mark2                  .toFixed(1) +"cm";
+}
+</script>
+<form onsubmit="false;">
+    <div class="form-group">
+        <label for="shackle_length">Shackle length (Tip of eye to inside of knot)</label>
+        <input type="number" min="0" step=".1" class="form-control form-control-lg" id="shackle_length" placeholder="Enter shackle length" onChange="Calculate(this.form)">
+
+        <label for="line_diameter">Line diameter</label>
+        <select class="form-control form-control-lg" name="line_diameter" onChange="Calculate(this.form)">
+             <option value=".2">2mm</option>
+             <option value=".3">3mm</option>
+             <option value=".4" selected>4mm</option>
+             <option value=".5">5mm</option>
+             <option value=".6">6mm</option>
+             <option value=".8">8mm</option>
+             <option value="1.0">10mm</option>
+             <option value="1.2">12mm</option>
+         </select>
+
+         <button type="button" class="btn btn-primary" onClick="Calculate_Softshackle(this.form)">Calculate</button>
+    </div>
+    <hr>
+    <div class="form-group">
+        <label for="inner_diameter">Inside diameter closed</label>
+        <input type="text" readonly class="form-control-plaintext" id="inner_diameter">
+
+        <label for="inner_diameter_streched">Inside diameter closed and streched</label>
+        <input type="text" readonly class="form-control-plaintext" id="inner_diameter_streched">
+
+        <label for="load_diameter">Max diameter of load</label>
+        <input type="text" readonly class="form-control-plaintext" id="load_diameter">
+
+        <label for="length">Total line needed</label>
+        <input type="text" readonly class="form-control-plaintext" id="length">
+     
+        <label for="mark1">Mark1 - From end</label>
+        <input type="text" readonly class="form-control-plaintext" id="mark1">
+
+        <label for="mark2">Mark2 - From first mark</label>
+        <input type="text" readonly class="form-control-plaintext" id="mark2">
+    </div>
+</form> 
\ No newline at end of file