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Convert between kilograms, pounds, grams, ounces, stones, milligrams, and metric tons instantly. The most complete free weight and mass converter online — with conversion tables, formulas, and real-world examples.
Weight conversion is needed in everyday life — from cooking recipes that use grams vs ounces, to understanding your body weight in both kilograms and pounds, to shipping packages internationally where weight limits are in different units.
The base unit of mass in the SI system is the kilogram (kg). All other mass units are defined relative to it. The kilogram was redefined in 2019 based on Planck's constant, making it the most precisely defined unit in history.
The kilogram to pound conversion is the most commonly searched weight conversion worldwide. 1 kg = 2.20462 lbs. To convert kg to lbs, multiply by 2.20462. To convert lbs to kg, multiply by 0.453592.
Essential for cooking, baking, and food labeling. 1 ounce = 28.3495 grams. To convert ounces to grams, multiply by 28.3495. To convert grams to ounces, divide by 28.3495.
The stone is a unit of weight used in the UK and Ireland for body weight. 1 stone = 14 pounds = 6.35029 kg. A person weighing 11 stone 7 pounds = 73.03 kg.
| Unit | Symbol | Grams Equivalent |
|---|---|---|
| Metric Ton | t | 1,000,000 g |
| Kilogram | kg | 1,000 g |
| Pound | lb | 453.592 g |
| Ounce | oz | 28.3495 g |
| Stone | st | 6,350.29 g |
| Gram | g | 1 g |
Enter your values into the input fields above and click Calculate for instant results. All calculations run in your browser — no data is sent to any server, ensuring complete privacy. Use the Copy button to save your results and the Share button to send a link to this calculator.
Results are based on the formula and inputs provided. For important financial, medical, or legal decisions, always verify results with a qualified professional. This tool is designed to give quick, reliable estimates for planning and educational purposes.
Always double-check your input values and units before calculating. Small input errors can significantly affect results. Use the Reset button to clear all fields and start fresh. For multi-step calculations, use the result of one calculation as the input for the next.
| Term | Meaning | Example |
|---|---|---|
| Input | Value you enter into the calculator | Amount, rate, or quantity |
| Output | Calculated result shown after clicking Calculate | Final answer or converted value |
| Formula | Mathematical equation used for the calculation | Shown in Formula section above |
| Precision | Number of decimal places in the result | Typically 2-4 decimal places |
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