Free Online Weight Converter
Use our comprehensive weight converter tool to convert between kilograms, pounds, ounces, grams, and stones. Calculate your BMI with health categories, compare weights to common objects, estimate shipping costs, and access industry-specific weight standards—perfect for health tracking, shipping calculations, cooking, and professional use.
Conversion Result
Enter valid values to see conversion result
| Kilograms (kg) | Pounds (lb) |
|---|
Key Insights
- 1 kg = 2.20462 lb - Remember this for quick mental conversions
- For rough estimates: 1 kg ≈ 2.2 lb is accurate enough for most purposes
- To convert pounds to kilograms: divide by 2.20462 or multiply by 0.453592
When converting weights, it's important to understand the different measurement systems used around the world. The metric system is used by most countries, while the imperial system is primarily used in the United States.
Metric System
- Base Unit: Gram (g)
- 1 kilogram (kg) = 1,000 grams
- 1 metric ton (t) = 1,000 kilograms
- Used by: Most countries worldwide, scientific community
- Advantages: Decimal-based, easy to convert
Imperial/US Customary
- Base Unit: Pound (lb)
- 1 pound (lb) = 16 ounces (oz)
- 1 stone (st) = 14 pounds (UK)
- 1 US ton = 2,000 pounds
- Used by: United States, Liberia, Myanmar
Specialized Weight Units:
Troy Ounce: Used for precious metals (31.1035 grams) • Carat: Used for gemstones (0.2 grams) • Grain: Used for bullets and arrows (0.0648 grams)
Comprehensive Unit Coverage
Convert between metric, imperial, troy, and specialized weight units with precision
BMI Calculator
Calculate Body Mass Index with automatic category classification and health insights
Real-World Comparisons
Visualize weights by comparing to common objects, animals, and vehicles
Shipping Estimates
Get instant shipping cost estimates based on package weight and dimensions
- Dr. Sarah Chen, Nutritionist“This weight converter is incredibly accurate for dietary planning. The food portion comparisons help clients visualize their intake better.”
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Healthy BMI range: 18.5-24.9 for adults
Standard luggage weight: 23kg (50lb) for most airlines
Use comparison tool to visualize abstract weights