Barrel Volume Calculator |
<script language="JavaScript">
function perRound(num, precision) {
var precision = 3; //default value if not passed from caller, change if desired
// remark if passed from caller
precision = parseInt(precision); // make certain the decimal precision is an integer
var result1 = num * Math.pow(10, precision);
var result2 = Math.round(result1);
var result3 = result2 / Math.pow(10, precision);
return zerosPad(result3, precision);
}
function zerosPad(rndVal, decPlaces) {
var valStrg = rndVal.toString(); // Convert the number to a string
var decLoc = valStrg.indexOf("."); // Locate the decimal point
// check for a decimal
if (decLoc == -1) {
decPartLen = 0; // If no decimal, then all decimal places will be padded with 0s
// If decPlaces is greater than zero, add a decimal point
valStrg += decPlaces > 0 ? "." : "";
}
else {
decPartLen = valStrg.length - decLoc - 1; // If there is a decimal already, only the needed decimal places will be padded with 0s
}
var totalPad = decPlaces - decPartLen; // Calculate the number of decimal places that need to be padded with 0s
if (totalPad > 0) {
// Pad the string with 0s
for (var cntrVal = 1; cntrVal <= totalPad; cntrVal++)
valStrg += "0";
}
return valStrg;
}
// send the value in as "num" in a variable
// clears field of default value
function clear_field(field) {
if (field.value==field.defaultValue) {
field.value=''
}
}
// data definitions
// variables
var i="";
function ClearForm(form){
form.rad1.value = "";
form.rad2.value = "";
form.height.value = "";
form.vol.value="";
form.answer.value="";
}
function rad1(rad2, height, vol) {
stuff1= eval((3*vol)/(Math.PI*height));
stuff1 = eval((stuff1) - eval(rad2*rad2));
stuff1 = Math.abs(eval(stuff1/2));
stuff1 = eval(Math.sqrt(stuff1));
return stuff1;
}
function rad2(rad1, height, vol) {
inside=eval(3*vol/(Math.PI*height));
inside= eval(inside - 2*rad1*rad1);
inside=Math.abs(inside);
stuff2=eval(Math.sqrt(inside));
return stuff2;
}
function height(rad1, rad2, vol) {
barheight=(eval(eval(2*rad1*rad1)+ eval(rad2*rad2))*Math.PI);
barheight=eval((3*vol)/barheight);
return barheight;
}
function vol(rad1, rad2, height) {
p = Math.PI;
barvol=eval(eval(2*rad1*rad1) + eval(rad2*rad2));
barvol=eval(height * p * barvol/3);
return barvol;
}
function checkform(form) {
if (form.rad1.value==""&&form.rad2.value==""&&form.height.value=="") {
i = 4;
return true;
}
if (form.rad1.value==""&&form.rad2.value==""&&form.vol.value=="") {
i = 4;
return true;
}
if (form.vol.value==""&&form.rad1.value==""&&form.height.value=="") {
i = 4;
return true;
}
if (form.vol.value==""&&form.rad2.value==""&&form.height.value=="") {
i = 4;
return true;
}
if (form.vol.value==""&&form.height.value=="") {
i = 4;
return true;
}
if (form.rad1.value==""&&form.vol.value=="") {
i = 4;
return true;
}
if (form.rad2.value==""&&form.height.value=="") {
i = 4;
return true;
}
if (form.rad2.value==""&&form.vol.value=="") {
i = 4;
return true;
}
if (form.rad1.value==""&&form.rad2.value=="") {
i = 4;
return true;
}
if (form.rad1.value==""&&form.height.value=="") {
i = 4;
return true;
}
if (form.vol.value==""){
i = 0;
return true;
}
else if (form.rad1.value=="") {
i = 1;
}
else if (form.rad2.value==""){
i = 2;
}
else if (form.height.value==""){
i = 3;
}
return true;
}
function computeform(form) {
if (checkform(form)){
if (i ==4) {
alert("\n INCOMPLETE DATA! \n Plese complete form first");
}
else if (i ==1){
barr1=Math.abs(rad1(form.rad2.value, form.height.value, form.vol.value));
form.rad1.value=barr1;
form.answer.value=barr1;
}
else if (i ==2){
barr2=Math.abs(rad2(form.rad1.value, form.height.value, form.vol.value));
form.rad2.value=barr2;
form.answer.value=barr2;
}
else if (i ==3){
barht=Math.abs(height(form.rad1.value, form.rad2.value, form.vol.value));
form.height.value=barht;
form.answer.value=barht;
}
else if (i ==0) {
barvolume=Math.abs(vol(form.rad1.value, form.rad2.value, form.height.value));
form.vol.value=barvolume;
form.answer.value=perRound(barvolume);
}
}
return true;
}
</script>
Barrel Volume Calculator to find out Volume of a barrel based on values of Top or Bottom radius and Middle radius of Barrel. Barrel is a large round container, with flat ends and curved sides.
Formulas
Volume = (h * PI * (2* r1 2 + r22) / 3 )
barrel volume calculator, find barrel, in a cylinder, how to calculate of oil, conversion, crude beer.
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