How TO - Weight Converter

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Learn how to create a weight converter with HTML and JavaScript.

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Create a Weight Converter

Create an input element that can convert a value from one weight measurement to another.

Step 1) Add HTML:

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Step 2) Add JavaScript:

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Convert from Pounds to other Measurements

The table below shows how to convert from Pounds to other weight
measurements:

Description	Formula	Example
Convert from Pounds to Kilograms	kg=lb/2.2046	Try it
Convert from Pounds to Ounces	oz=lb*16	Try it
Convert from Pounds to Grams	g=lb/0.0022046	Try it
Convert from Pounds to Stones	st=lb*0.071429	Try it

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Convert from Kilograms to other Measurements

The table below shows how to convert from Kilograms to other weight
measurements:

Description	Formula	Example
Convert from Kilograms to Pounds	lb=kg*2.2046	Try it
Convert from Kilograms to Ounces	oz=kg*35.274	Try it
Convert from Kilograms to Grams	g=kg*1000	Try it
Convert from Kilograms to Stones	st=kg*0.1574	Try it

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Convert from Ounces to other Measurements

The table below shows how to convert from Ounces to other weight
measurements:

Description	Formula	Example
Convert from Ounces to Pounds	lb=oz*0.0625	Try it
Convert from Ounces to Kilograms	kg=oz/35.274	Try it
Convert from Ounces to Grams	g=oz/0.035274	Try it
Convert from Ounces to Stones	st=oz*0.0044643	Try it

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Convert from Grams to other Measurements

The table below shows how to convert from Grams to other weight
measurements:

Description	Formula	Example
Convert from Grams to Pounds	lb=g*0.0022046	Try it
Convert from Grams to Kilograms	kg=g/1000	Try it
Convert from Grams to Ounces	oz=g*0.035274	Try it
Convert from Grams to Stones	st=g*0.00015747	Try it

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Convert from Stones to other Measurements

The table below shows how to convert from Stones to other weight
measurements:

Description	Formula	Example
Convert from Stones to Pounds	lb=st*14	Try it
Convert from Stones to Kilograms	kg=st/0.15747	Try it
Convert from Stones to Ounces	oz=st*224	Try it
Convert from Stones to Grams	g=st/0.00015747	Try it

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function weightConverter(source,valNum)
valNum = parseFloat(valNum);
var inputPounds = document.getElementById("inputPounds");
var inputKilograms = document.getElementById("inputKilograms");
var inputOunces = document.getElementById("inputOunces");
var inputGrams = document.getElementById("inputGrams");
var inputStones = document.getElementById("inputStones");
if (source=="inputPounds")
inputKilograms.value=(valNum/2.2046).toFixed(2);
inputOunces.value=(valNum*16).toFixed(2);
inputGrams.value=(valNum/0.0022046).toFixed();
inputStones.value=(valNum*0.071429).toFixed(3);

if (source=="inputKilograms")
inputPounds.value=(valNum*2.2046).toFixed(2);
inputOunces.value=(valNum*35.274).toFixed(2);
inputGrams.value=(valNum*1000).toFixed();
inputStones.value=(valNum*0.1574).toFixed(3);

if (source=="inputOunces")
inputPounds.value=(valNum*0.062500).toFixed(4);
inputKilograms.value=(valNum/35.274).toFixed(4);
inputGrams.value=(valNum/0.035274).toFixed(1);
inputStones.value=(valNum*0.0044643).toFixed(4);

if (source=="inputGrams")
inputPounds.value=(valNum*0.0022046).toFixed(4);
inputKilograms.value=(valNum/1000).toFixed(4);
inputOunces.value=(valNum*0.035274).toFixed(3);
inputStones.value=(valNum*0.00015747).toFixed(5);

if (source=="inputStones")
inputPounds.value=(valNum*14).toFixed(1);
inputKilograms.value=(valNum/0.15747).toFixed(1);
inputOunces.value=(valNum*224).toFixed();
inputGrams.value=(valNum/0.00015747).toFixed();