Convert between different weight units including kilograms, grams, pounds, ounces, stones, metric tons, and more. Our weight converter provides instant, accurate conversions for cooking, shipping, fitness tracking, scientific calculations, and everyday use. The tool is completely free and works on all devices.
Complete Guide to Weight Conversion
Weight conversion is essential in many fields including science, engineering, cooking, and international trade. Understanding how to convert between different weight systems (metric vs imperial) is crucial for accuracy in measurements.
Common Weight Conversion Use Cases
- Cooking and Baking: Converting between grams and ounces for international recipes
- Fitness and Health: Tracking weight loss or gain in different units
- Shipping and Logistics: Calculating package weights for international shipping
- Science and Engineering: Precise measurements in experiments and calculations
- Everyday Use: Understanding product weights when traveling between countries
Weight Unit Guide
Kilograms (kg)
The kilogram is the base unit of mass in the International System of Units (SI). It's defined by the Planck constant and is used worldwide for scientific and most everyday measurements.
Pounds (lb)
The pound is a unit of mass used in the imperial and United States customary systems. One pound equals 0.45359237 kilograms exactly. The pound is widely used in the United States for body weight and grocery items.
Grams (g)
The gram is a metric unit of mass equal to one thousandth of a kilogram. It's commonly used for small measurements in cooking, science, and everyday items like food packaging.
Ounces (oz)
The ounce is used in both the US customary and British imperial systems. There are 16 ounces in a pound. Ounces are commonly used for measuring food portions and precious metals.
Important Weight Conversion Formulas
- Kilograms to Pounds: Multiply kg by 2.20462 to get pounds
- Pounds to Kilograms: Multiply pounds by 0.453592 to get kg
- Grams to Ounces: Multiply grams by 0.035274 to get ounces
- Ounces to Grams: Multiply ounces by 28.3495 to get grams
- Stones to Pounds: Multiply stones by 14 to get pounds
Why Use Our Weight Converter?
Our online weight converter offers several advantages over manual calculations or other tools:
- Accuracy: Uses precise conversion factors to ensure accurate results every time
- Comprehensive: Supports all major weight units including metric and imperial systems
- Instant Results: Provides conversions in real-time as you type
- Mobile-Friendly: Works perfectly on smartphones, tablets, and desktop computers
- Completely Free: No registration, no limits, no hidden costs
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Weight Conversion Tips
For best results when converting weights:
- Always double-check critical conversions for important applications
- Remember that weight and mass are technically different in physics, but for everyday use on Earth, they're interchangeable
- When converting recipes, note that fluid ounces (volume) are different from ounces (weight)
- For scientific precision, use more decimal places in your conversions
- Bookmark this page for quick access to weight conversions anytime