Weight Converter
Convert between milligrams, grams, kilograms, metric tons, pounds (lb) and ounces (oz): enter one value and see all the other units at a glance.
Note: These calculations are for informational purposes only and do not replace professional tax or financial advice. All information without guarantee.
FAQ
Frequently Asked Questions
How do I convert between metric and imperial weight units?
1 pound = 453.6 grams, 1 ounce = 28.35 grams, 1 stone = 6.35 kg. For quick estimation: divide pounds by 2.2 to get kg, or multiply kg by 2.2 to get pounds.
What is the difference between mass and weight?
Mass is the amount of matter (measured in kilograms), which stays constant. Weight is the gravitational force on that mass (measured in newtons), which varies by location. In daily life, both terms are used interchangeably.
Which factors does the converter use for pounds and ounces?
The converter uses 1 lb = 453.592 g and 1 oz = 28.3495 g, rounded values of the exact definitions of 453.59237 g and 28.349523125 g. The difference is below 0.0001%, but with six decimal places shown it can appear in the last digit: 1 kg gives 2.204624 lb instead of exactly 2.204623 lb. For body weight, recipes or luggage this is irrelevant; "pound" here always means the Anglo-American pound (lb), not the German Pfund of 500 g.
Guide
What is the Weight Converter?
The weight converter converts between kilogram, gram, milligram, tonne, pound (lbs), ounce and stone.
How does the Weight Converter work?
Enter the value and source unit. The calculator converts to all common weight units, using the kilogram as the base unit.
Key Data and Facts
1 pound (lbs) = 0.4536 kg. 1 ounce (oz) = 28.35 g. 1 stone = 6.35 kg. 1 tonne = 1,000 kg. German Pfund = 500 g.
Step-by-Step Guide
How to use the weight converter step by step: 1. Choose the source unit – kilogram, gram, milligram, tonne, pound (lbs), ounce (oz) or stone. 2. Enter the value – the calculator instantly shows all conversions. 3. The base unit is the kilogram: 1 kg = 1,000 g = 1,000,000 mg. 4. Anglo-American units: 1 pound (lbs) = 453.592 g, 1 ounce (oz) = 28.3495 g, 1 stone = 14 lbs = 6.35 kg. 5. Caution, risk of confusion: the German Pfund (colloquial) = 500 g, the Anglo-American pound (lb) = 453.6 g. 6. Common applications: converting body weight (e.g. 180 lbs = 81.6 kg), quantities of food in recipes (8 oz of flour = 227 g), luggage weight for air travel. Tip: for a quick conversion of lbs to kg, divide the value by 2.2.
Calculation Example
150 lbs in kg: 150 * 0.4536 = 68.04 kg. 2.5 tonnes in pounds (lbs): 2,500 * 2.2046 = 5,511.5 lbs.
Sources
Official sources
Calculations are based on applicable German laws and official data:
Full methodology at Methodology.
Reviewed by Konstantin Iakovlev · Last updated:
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