How to Use the Weight Converter
Basic Weight Conversion
The basic converter handles the most common weight conversions between metric and imperial units. Simply enter your weight value, select the source unit, choose your target unit, and click convert.
Metric System Conversions
Perfect for scientific calculations and international standards. Convert between milligrams, grams, kilograms, and metric tons with precision.
Imperial System Conversions
Ideal for US and UK measurements. Handle conversions between ounces, pounds, stones, hundredweight, and various ton measurements.
Special Unit Conversions
Specialized for jewelry, precious metals, and pharmaceutical applications. Convert between carats, troy ounces, grains, and apothecary units.
Converting Body Weight
70 kg = 154.32 lbs
Common conversion for health and fitness tracking between metric and imperial measurements.
Precious Metal Weight
1 troy oz = 31.1035 g
Standard conversion for gold, silver, and other precious metals in trading and jewelry.
Cooking Measurements
8 oz = 226.8 g
Essential for following recipes and converting between US and metric cooking measurements.
Weight Conversion Formulas
Frequently Asked Questions (FAQ)
How accurate are the weight conversions?
Our weight converter uses internationally accepted conversion factors and provides accuracy up to 10 decimal places. For most practical applications, this level of precision exceeds requirements. We use the exact conversion factors defined by international standards organizations.
What's the difference between troy ounces and regular ounces?
Troy ounces (31.1035 grams) are used for precious metals and gemstones, while avoirdupois ounces (28.3495 grams) are used for general weight measurements. Troy ounces are about 10% heavier than regular ounces. Always specify which type you need for accuracy.
Why do some countries use different weight systems?
Historical and cultural reasons explain the variation. Most countries use the metric system (kg, g), while the United States primarily uses imperial units (lbs, oz). The UK uses a mix of both systems. International trade and science predominantly use metric measurements.
Can I convert weights for precious metals and jewelry?
Yes! Our special units tab includes troy ounces, carats, grains, and pennyweight - all essential for jewelry and precious metal calculations. These units have specific conversion factors different from standard weight measurements.
How do I convert between metric and imperial for cooking?
Use our basic converter for common cooking conversions. For example: 8 oz = 226.8g, 1 lb = 453.6g, 1 kg = 2.2 lbs. Remember that liquid ounces (volume) are different from weight ounces - make sure you're converting the right measurement type.
What's the difference between US tons and metric tons?
A US ton (short ton) equals 2,000 pounds or 907.185 kg. A metric ton equals 1,000 kg or 2,204.62 pounds. A UK ton (long ton) equals 2,240 pounds. Always specify which ton you're using to avoid confusion in calculations.
Can I use this converter for medical dosage calculations?
While our converter is highly accurate, medical dosage calculations should always be verified by healthcare professionals. Use this tool for reference only, and consult medical guidelines and professionals for any health-related weight conversions.
How do I convert very small weights like milligrams?
Use our metric units tab for precise small weight conversions. Enter the value in milligrams and convert to any other unit. For scientific applications, we maintain high precision even for very small measurements.
Are the conversions the same worldwide?
Yes, the fundamental conversion factors are internationally standardized. However, some countries may have slight variations in how they define certain traditional units. Our converter uses the most widely accepted international standards.
Can I bookmark specific conversions for quick access?
Yes! Bookmark this page and use the different tabs for quick access to your most-used conversion types. The converter maintains your last used settings, making repeat conversions faster and more convenient.
About This Weight Converter
Our comprehensive weight conversion tool is designed to handle all your weight and mass conversion needs with precision and ease. Whether you're a healthcare professional converting patient weights, a chef adapting international recipes, a jeweler working with precious metals, or a scientist conducting research, this converter provides the accuracy and functionality you need.
Why Choose Our Weight Converter?
Comprehensive Coverage
Supports over 20 different weight units across metric, imperial, troy, and apothecary systems.
Professional Accuracy
Uses official conversion factors with precision suitable for scientific and commercial applications.
User-Friendly Design
Intuitive interface with organized tabs for different unit categories and instant results.
No Installation Required
Works directly in your web browser on any device without downloads or registrations.
Privacy Protected
All calculations performed locally in your browser with no data collection or storage.
Always Free
Complete access to all conversion features with no hidden costs or subscription requirements.
Disclaimer: While we strive to ensure the accuracy of all conversions using internationally accepted standards, this tool is provided for general use. For critical applications in healthcare, legal, or commercial contexts, please verify results with appropriate professional standards or consultation.