Weight Converter
Convert between kilograms, pounds, ounces, grams, stones, tons, and other weight units.
About Weight Converter
A weight converter transforms mass measurements between units like kilograms, pounds, ounces, grams, stones, tons, and more. Weight conversion is essential for cooking (following international recipes), shipping (calculating postage), fitness (tracking body weight), and international commerce (understanding product specifications). Different countries use different weight systems, making this converter indispensable for global communication.
How to Use
Enter the weight value, select the source unit (e.g., kilograms), and choose the target unit (e.g., pounds). The converted value appears immediately. You can swap units with one click for reverse conversion. The tool supports decimal inputs for precise measurements like 0.75 kg or 3.5 oz.
Formula / Key Equations
Conversions use the kilogram as the SI base unit: 1 pound = 0.45359237 kg (exact international definition), 1 ounce = 0.028349523125 kg, 1 stone = 6.35029318 kg, 1 metric ton = 1000 kg, 1 US ton = 907.18474 kg.
Common Use Cases
Common uses: converting body weight between kg and lbs for fitness tracking, following recipes that use grams instead of ounces, calculating shipping costs based on package weight in different unit systems, understanding nutrition labels from different countries, and comparing product weights when shopping internationally.
Limitations
The converter uses standard mass units and does not include Troy ounces (used for precious metals), carats (used for gemstones), or atomic mass units (used in chemistry). For precious metals or gemstones, use specialized converters. US and UK 'tons' differ — the converter distinguishes between metric tons, US short tons, and UK long tons.
Frequently Asked Questions
How many pounds are in a kilogram?
There are approximately 2.20462 pounds in 1 kilogram. Precisely, 1 kg = 2.2046226218487757 lbs. This is based on the international definition where 1 pound equals exactly 0.45359237 kilograms.
What is a stone in weight?
A stone is a British unit of weight equal to 14 pounds or approximately 6.35 kilograms. It is commonly used in the UK and Ireland for measuring body weight. For example, a person weighing 11 stone weighs 154 pounds or about 70 kg.
How do I convert grams to ounces?
Divide the gram value by 28.3495. For example, 100 grams = 100 / 28.3495 = 3.527 ounces. Our calculator handles this instantly with full precision.
What is the difference between a US ton and a metric ton?
A US short ton is 2,000 pounds (907.18 kg), while a metric ton (tonne) is 1,000 kg (2,204.62 lbs). A UK long ton is 2,240 pounds (1,016.05 kg). The converter distinguishes between all three.
Is this weight converter free?
Yes, completely free with no sign-up required. All calculations happen instantly in your browser with no data sent to any server.
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