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Concrete Calculator for Your Site

You can use our concrete calculator on your website. The concrete calculator will be like the following. You can change the color, font, and some of the code to have the calculator fit into the style of your website.

Slabs, Square Footings, or Walls

length
width
thickness or height
quantity

Hole, Column, or Round Footings

diameter
depth or height
quantity

Circular Slab or Tube

outer diameter
inner diameter
length or height
quantity

Installation Instruction

To install, just copy all the code in the following text area into the html source code of your website.

TERMS OF USE
BY COPYING, YOU AGREED THAT:
1. THE MATERIALS ARE PROVIDED "AS IS" AND WITHOUT WARRANTIES OF ANY KIND.
2. DO NOT CHANGE ANY OF THE JAVASCRIPT CODE, INCLUDING THE LICENSE TEXT
3. YOU CAN CHANGE THE HTML AND CSS TO MAKE THE CALCULATOR FIT INTO THE STYLE OF YOUR SITE.
4. DO NOT REMOVE THE TEXT OF "powered by calculator.net"
5. COPYRIGHT BELONGS TO calculator.net
6. DO NOT REMOVE THE TERMS OF USE

<script>
//JAVASCRIPT BEGIN
/*****************************************
(C) http://www.calculator.net all right reserved.
*****************************************/
function gObj(obj) {var theObj;if(document.all){if(typeof obj=="string"){return document.all(obj);}else{return obj.style;}}if(document.getElementById){if(typeof obj=="string"){return document.getElementById(obj);}else{return obj.style;}}return null;}function trimAll(sString){while (sString.substring(0,1) == ' '){sString = sString.substring(1, sString.length);}while (sString.substring(sString.length-1, sString.length) == ' '){sString = sString.substring(0,sString.length-1);} return sString;}function isNumber(val){val=val+"";if (val.length<1) return false;if (isNaN(val)){return false;}else{return true;}}function showquickobjmsg(C,B,A){if(B){C="<font color=red>"+C+"</font>"}gObj(A).innerHTML=C}function calcslab(A){th=trimAll(gObj("slablength").value+"");SG=trimAll(gObj("slablengthunit").value+"");NP=trimAll(gObj("slabwidth").value+"");gd=trimAll(gObj("slabwidthunit").value+"");IB=trimAll(gObj("slabthick").value+"");gE=trimAll(gObj("slabthickunit").value+"");KR=trimAll(gObj("slabquantity").value+"");PL=trimAll((gObj("\x63\x61\x6C\x66\x6F\x6F\x74\x6E\x6F\x74\x65").innerHTML+"").toLowerCase());xE="\x70\x6F\x77\x65\x72\x65\x64\x20\x62\x79\x20\x3C\x61\x20\x68\x72\x65\x66\x3D\x22\x68\x74\x74\x70\x3A\x2F\x2F\x77\x77\x77\x2E\x63\x61\x6C\x63\x75\x6C\x61\x74\x6F\x72\x2E\x6E\x65\x74\x22\x3E\x63\x61\x6C\x63\x75\x6C\x61\x74\x6F\x72\x2E\x6E\x65\x74\x3C\x2F\x61\x3E";if(PL!=xE){cc="a";return }if(typeof (cc)!="undefined"){return }if(!isNumber(th)){showquickobjmsg("the length need to be numeric",true,A);return }else{if(!isNumber(NP)){showquickobjmsg("the width need to be numeric",true,A);return }else{if(!isNumber(IB)){showquickobjmsg("the thickness or height need to be numeric",true,A);return }else{if(!isNumber(KR)){showquickobjmsg("the quantity need to be numeric",true,A);return }}}}th=parseFloat(th);NP=parseFloat(NP);IB=parseFloat(IB);if((th<0)||(NP<0)||(IB<0)||(KR<0)){showquickobjmsg("all the number need to be positive",true,A);return }if(SG=="foot"){th=th*0.3048}else{if(SG=="inch"){th=th*0.0254}else{if(SG=="yard"){th=th*0.9144}else{if(SG=="centimeter"){th=th*0.01}}}}if(gd=="foot"){NP=NP*0.3048}else{if(gd=="inch"){NP=NP*0.0254}else{if(gd=="yard"){NP=NP*0.9144}else{if(gd=="centimeter"){NP=NP*0.01}}}}if(gE=="foot"){IB=IB*0.3048}else{if(gE=="inch"){IB=IB*0.0254}else{if(gE=="yard"){IB=IB*0.9144}else{if(gE=="centimeter"){IB=IB*0.01}}}}ET=th*NP*IB*KR;gA=ET/0.3048/0.3048/0.3048;PP=ET/0.9144/0.9144/0.9144;bQ=ET*2130;vH=gA*133;ko="<b>Results:</b><br><font color=green><b>"+gA.toPrecision(3)+"</b></font> cubic feet";ko+=" or <font color=green><b>"+PP.toPrecision(3)+"</b></font> cubic yards";ko+=" or <font color=green><b>"+ET.toPrecision(3)+"</b></font> cubic meters";ko+="<br> if pre-mixed concrete*, it is ";ko+=" <font color=green><b>"+vH.toPrecision(3)+"</b></font> lbs";ko+=" or <font color=green><b>"+bQ.toPrecision(3)+"</b></font> kgs";ko+="<br> if 60 lbs per bag, it is <font color=green><b>"+(vH/60).toPrecision(3)+"</b></font> bags";ko+="<br> if 80 lbs per bag, it is <font color=green><b>"+(vH/80).toPrecision(3)+"</b></font> bags";showquickobjmsg(ko,false,A)}function calchole(A){wG=trimAll(gObj("holediameter").value+"");kK=trimAll(gObj("holediameterunit").value+"");Mh=trimAll(gObj("holedepth").value+"");GR=trimAll(gObj("holedepthunit").value+"");Ff=trimAll(gObj("holequantity").value+"");PL=trimAll((gObj("\x63\x61\x6C\x66\x6F\x6F\x74\x6E\x6F\x74\x65").innerHTML+"").toLowerCase());xE="\x70\x6F\x77\x65\x72\x65\x64\x20\x62\x79\x20\x3C\x61\x20\x68\x72\x65\x66\x3D\x22\x68\x74\x74\x70\x3A\x2F\x2F\x77\x77\x77\x2E\x63\x61\x6C\x63\x75\x6C\x61\x74\x6F\x72\x2E\x6E\x65\x74\x22\x3E\x63\x61\x6C\x63\x75\x6C\x61\x74\x6F\x72\x2E\x6E\x65\x74\x3C\x2F\x61\x3E";if(PL!=xE){cc="a";return }if(typeof (cc)!="undefined"){return }if(!isNumber(wG)){showquickobjmsg("the diameter need to be numeric",true,A);return }else{if(!isNumber(Mh)){showquickobjmsg("the depth or height need to be numeric",true,A);return }else{if(!isNumber(Ff)){showquickobjmsg("the quantity need to be numeric",true,A);return }}}wG=parseFloat(wG);Mh=parseFloat(Mh);Ff=parseFloat(Ff);if((wG<0)||(Mh<0)||(Ff<0)){showquickobjmsg("all the number need to be positive",true,A);return }if(kK=="foot"){wG=wG*0.3048}else{if(kK=="inch"){wG=wG*0.0254}else{if(kK=="yard"){wG=wG*0.9144}else{if(kK=="centimeter"){wG=wG*0.01}}}}if(GR=="foot"){Mh=Mh*0.3048}else{if(GR=="inch"){Mh=Mh*0.0254}else{if(GR=="yard"){Mh=Mh*0.9144}else{if(GR=="centimeter"){Mh=Mh*0.01}}}}ET=Mh*3.14159*wG*wG*Ff/4;gA=ET/0.3048/0.3048/0.3048;PP=ET/0.9144/0.9144/0.9144;bQ=ET*2130;vH=gA*133;ko="<b>Results:</b><br><font color=green><b>"+gA.toPrecision(3)+"</b></font> cubic feet";ko+=" or <font color=green><b>"+PP.toPrecision(3)+"</b></font> cubic yards";ko+=" or <font color=green><b>"+ET.toPrecision(3)+"</b></font> cubic meters";ko+="<br> if pre-mixed concrete*, it is ";ko+=" <font color=green><b>"+vH.toPrecision(3)+"</b></font> lbs";ko+=" or <font color=green><b>"+bQ.toPrecision(3)+"</b></font> kgs";ko+="<br> if 60 lbs per bag, it is <font color=green><b>"+(vH/60).toPrecision(3)+"</b></font> bags";ko+="<br> if 80 lbs per bag, it is <font color=green><b>"+(vH/80).toPrecision(3)+"</b></font> bags";showquickobjmsg(ko,false,A)}function calctube(A){OJ=trimAll(gObj("tubediameter").value+"");ZN=trimAll(gObj("tubediameterunit").value+"");cT=trimAll(gObj("tubeindiameter").value+"");KQ=trimAll(gObj("tubeindiameterunit").value+"");lf=trimAll(gObj("tubedepth").value+"");WL=trimAll(gObj("tubedepthunit").value+"");lY=trimAll(gObj("tubequantity").value+"");PL=trimAll((gObj("\x63\x61\x6C\x66\x6F\x6F\x74\x6E\x6F\x74\x65").innerHTML+"").toLowerCase());xE="\x70\x6F\x77\x65\x72\x65\x64\x20\x62\x79\x20\x3C\x61\x20\x68\x72\x65\x66\x3D\x22\x68\x74\x74\x70\x3A\x2F\x2F\x77\x77\x77\x2E\x63\x61\x6C\x63\x75\x6C\x61\x74\x6F\x72\x2E\x6E\x65\x74\x22\x3E\x63\x61\x6C\x63\x75\x6C\x61\x74\x6F\x72\x2E\x6E\x65\x74\x3C\x2F\x61\x3E";if(PL!=xE){cc="a";return }if(typeof (cc)!="undefined"){return }if(!isNumber(OJ)){showquickobjmsg("the outer diameter need to be numeric",true,A);return }else{if(!isNumber(cT)){showquickobjmsg("the inner diameter need to be numeric",true,A);return }else{if(!isNumber(lf)){showquickobjmsg("the length or height need to be numeric",true,A);return }else{if(!isNumber(lY)){showquickobjmsg("the quantity need to be numeric",true,A);return }}}}OJ=parseFloat(OJ);cT=parseFloat(cT);lf=parseFloat(lf);if((OJ<0)||(cT<0)||(lf<0)||(lY<0)){showquickobjmsg("all the number need to be positive",true,A);return }if(OJ<cT){showquickobjmsg("the inner diamerter needs to be smaller than outer diamerter",true,A);return }if(ZN=="foot"){OJ=OJ*0.3048}else{if(ZN=="inch"){OJ=OJ*0.0254}else{if(ZN=="yard"){OJ=OJ*0.9144}else{if(ZN=="centimeter"){OJ=OJ*0.01}}}}if(KQ=="foot"){cT=cT*0.3048}else{if(KQ=="inch"){cT=cT*0.0254}else{if(KQ=="yard"){cT=cT*0.9144}else{if(KQ=="centimeter"){cT=cT*0.01}}}}if(WL=="foot"){lf=lf*0.3048}else{if(WL=="inch"){lf=lf*0.0254}else{if(WL=="yard"){lf=lf*0.9144}else{if(WL=="centimeter"){lf=lf*0.01}}}}ET=lf*3.14159*(OJ*OJ-cT*cT)*lY/4;gA=ET/0.3048/0.3048/0.3048;PP=ET/0.9144/0.9144/0.9144;bQ=ET*2130;vH=gA*133;ko="<b>Results:</b><br><font color=green><b>"+gA.toPrecision(3)+"</b></font> cubic feet";ko+=" or <font color=green><b>"+PP.toPrecision(3)+"</b></font> cubic yards";ko+=" or <font color=green><b>"+ET.toPrecision(3)+"</b></font> cubic meters";ko+="<br> if pre-mixed concrete*, it is ";ko+=" <font color=green><b>"+vH.toPrecision(3)+"</b></font> lbs";ko+=" or <font color=green><b>"+bQ.toPrecision(3)+"</b></font> kgs";ko+="<br> if 60 lbs per bag, it is <font color=green><b>"+(vH/60).toPrecision(3)+"</b></font> bags";ko+="<br> if 80 lbs per bag, it is <font color=green><b>"+(vH/80).toPrecision(3)+"</b></font> bags";showquickobjmsg(ko,false,A)};
//JAVASCRIPT END
</script>

<form name="calcf">
<h2>Slabs, Square Footings, or Walls</h2>
<table width="350" border="0" cellspacing="0" cellpadding="4" bgcolor="#dddddd" id="standard">
	<tr>
		<td align="right">length</td>
		<td align="right"><input type="text" name="slablength" size="6" id="slablength" value="2.5" style="text-align: right;"></td>
		<td><select id="slablengthunit" name="slablengthunit"><option value="foot" selected>foot</option><option value="inch">inch</option><option value="yard">yard</option><option value="meter">meter</option><option value="centimeter">centimeter</option></select></td>
	</tr>
	<tr>
		<td align="right">width</td>
		<td align="right"><input type="text" name="slabwidth" size="6" id="slabwidth" value="5" style="text-align: right;"></td>
		<td><select id="slabwidthunit" name="slabwidthunit"><option value="foot" selected>foot</option><option value="inch">inch</option><option value="yard">yard</option><option value="meter">meter</option><option value="centimeter">centimeter</option></select></td>
	</tr>
	<tr>
		<td align="right">thickness or height</td>
		<td align="right"><input type="text" name="slabthick" size="6" id="slabthick" value="5" style="text-align: right;"></td>
		<td><select id="slabthickunit" name="slabthickunit"><option value="foot">foot</option><option value="inch" selected>inch</option><option value="yard">yard</option><option value="meter">meter</option><option value="centimeter">centimeter</option></select></td>
	</tr>
	<tr>
		<td align="right">quantity</td>
		<td align="right"><input type="text" name="slabquantity" size="6" id="slabquantity" value="1" style="text-align: right;"></td>
		<td> </td>
	</tr>
	<tr>
		<td> </td>
		<td><input type="button" value="Calculate" onclick="javascript:calcslab('coutputslab');"></td>
		<td> </td>
	</tr>
</table>
<div id="coutputslab"></div>
<h2>Hole, Column, or Round Footings</h2>
<table width="350" border="0" cellspacing="0" cellpadding="4" bgcolor="#dddddd" id="standard">
	<tr>
		<td align="right">diameter</td>
		<td align="right"><input type="text" name="holediameter" size="6" id="holediameter" value="2.5" style="text-align: right;"></td>
		<td><select id="holediameterunit" name="holediameterunit"><option value="foot" selected>foot</option><option value="inch">inch</option><option value="yard">yard</option><option value="meter">meter</option><option value="centimeter">centimeter</option></select></td>
	</tr>
	<tr>
		<td align="right">depth or height</td>
		<td align="right"><input type="text" name="holedepth" size="6" id="holedepth" value="6" style="text-align: right;"></td>
		<td><select id="holedepthunit" name="holedepthunit"><option value="foot">foot</option><option value="inch" selected>inch</option><option value="yard">yard</option><option value="meter">meter</option><option value="centimeter">centimeter</option></select></td>
	</tr>
	<tr>
		<td align="right">quantity</td>
		<td align="right"><input type="text" name="holequantity" size="6" id="holequantity" value="1" style="text-align: right;"></td>
		<td> </td>
	</tr>
	<tr>
		<td> </td>
		<td><input type="button" value="Calculate" onclick="javascript:calchole('coutputhole');"></td>
		<td> </td>
	</tr>
</table>
<div id="coutputhole"></div>
<h2>Circular Slab or Tube</h2>
<table width="350" border="0" cellspacing="0" cellpadding="4" bgcolor="#dddddd" id="standard">
	<tr>
		<td align="right">outer diameter</td>
		<td align="right"><input type="text" name="tubediameter" size="6" id="tubediameter" value="5" style="text-align: right;"></td>
		<td><select id="tubediameterunit" name="tubediameterunit"><option value="foot" selected>foot</option><option value="inch">inch</option><option value="yard">yard</option><option value="meter">meter</option><option value="centimeter">centimeter</option></select></td>
	</tr>
	<tr>
		<td align="right">inner diameter</td>
		<td align="right"><input type="text" name="tubeindiameter" size="6" id="tubeindiameter" value="4" style="text-align: right;"></td>
		<td><select id="tubeindiameterunit" name="tubeindiameterunit"><option value="foot" selected>foot</option><option value="inch">inch</option><option value="yard">yard</option><option value="meter">meter</option><option value="centimeter">centimeter</option></select></td>
	</tr>
	<tr>
		<td align="right">length or height</td>
		<td align="right"><input type="text" name="tubedepth" size="6" id="tubedepth" value="5" style="text-align: right;"></td>
		<td><select id="tubedepthunit" name="tubedepthunit"><option value="foot">foot</option><option value="inch" selected>inch</option><option value="yard">yard</option><option value="meter">meter</option><option value="centimeter">centimeter</option></select></td>
	</tr>
	<tr>
		<td align="right">quantity</td>
		<td align="right"><input type="text" name="tubequantity" size="6" id="tubequantity" value="1" style="text-align: right;"></td>
		<td> </td>
	</tr>
	<tr>
		<td> </td>
		<td><input type="button" value="Calculate" onclick="javascript:calctube('coutputtube');"></td>
		<td> </td>
	</tr>
</table>
<div id="coutputtube"></div>
<br><div id="calfootnote">powered by <a href="http://www.calculator.net">calculator.net</a></div>

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