What is Weight Conversion?
Weight conversion is the process of converting measurements from one unit of weight or mass to another. Whether you're working with metric units like grams and kilograms, or imperial units like ounces and pounds, understanding weight conversions is essential for cooking, shipping, fitness tracking, and scientific calculations.
Our weight converter supports conversions between grams (g), kilograms (kg), ounces (oz), pounds (lb), metric tons (t), and stones (st). This tool helps you quickly convert weight measurements for recipes, package shipping, body weight tracking, and professional applications.
How to Convert Weight Units
Converting between weight units requires understanding the relationship between different measurement systems. All conversions are based on the kilogram as the base unit, with other units defined relative to it.
Result = (Value × From Unit Factor) / To Unit FactorExample: Convert 70 kilograms to pounds.
Kilograms to pounds conversion factor: 1 kg = 2.20462 pounds
Calculation: 70 kg × 2.20462 = 154.3234 pounds
Result: 70 kilograms equals 154.32 pounds
Understanding Weight Units
- Grams (g):The base unit of mass in the metric system. 1 gram = 0.001 kilograms. Commonly used for small measurements like food portions.
- Kilograms (kg):The standard unit of mass in the metric system. 1 kg = 1,000 grams. Used for body weight, produce, and most everyday measurements.
- Ounces (oz):Common imperial unit. 1 ounce = 28.3495 grams or 0.0283495 kilograms. Often used in cooking and postal services.
- Pounds (lb):Widely used in the United States. 1 pound = 16 ounces or 0.453592 kilograms. Common for body weight and produce.
- Metric Tons (t):Used for very large weights. 1 metric ton = 1,000 kilograms. Common in shipping, industry, and large-scale measurements.
- Stones (st):Commonly used in the UK for body weight. 1 stone = 14 pounds or 6.35029 kilograms.
Real-World Uses of Weight Conversion
Cooking & Baking
Convert between grams and ounces when following recipes from different countries or adjusting ingredient quantities.
Fitness & Health
Convert between kilograms and pounds when tracking body weight, especially when using fitness equipment or apps with different unit systems.
Shipping & Logistics
Convert package weights between kilograms and pounds for international shipping, calculating postage, and customs declarations.
Scientific Research
Convert measurements between metric units for laboratory work, chemical calculations, and scientific data analysis.
Grocery Shopping
Compare product weights when shopping internationally or understanding package sizes in different unit systems.
Sports & Athletics
Convert weight measurements for equipment, training loads, and competition requirements that may use different unit systems.
Frequently Asked Questions About Weight Conversion
How do I convert kilograms to pounds?
Multiply the number of kilograms by 2.20462 to get pounds. For example, 10 kg × 2.20462 = 22.0462 pounds.
How many grams are in a kilogram?
There are 1,000 grams in 1 kilogram. This is a base-10 conversion in the metric system.
What is the difference between weight and mass?
Mass is the amount of matter in an object (measured in kg), while weight is the force of gravity on that mass (measured in newtons). In everyday use, we often use "weight" to mean mass.
How do I convert ounces to grams?
Multiply ounces by 28.3495 to get grams. For example, 16 oz × 28.3495 = 453.592 grams (which equals 1 pound).
What is a stone in weight?
A stone is a British unit of weight equal to 14 pounds or approximately 6.35 kilograms. It's commonly used in the UK and Ireland for body weight.
Why is it important to convert weight correctly?
Accurate weight conversion is crucial for cooking, shipping, health tracking, and scientific research to ensure safety and compliance with requirements.