Weight Converter
Convert between pounds, kilograms, ounces, grams and more with instant results and high precision. Perfect for cooking, shipping, fitness tracking and scientific applications.
Weight Conversion Calculator
Convert between metric and imperial weight units with high precision
Popular Conversions
Quick Reference
When to Use Each Unit
Weight Conversion Table
Common weight conversions for quick reference
| From | To | Multiply by | Example |
|---|---|---|---|
| Pounds | Kilograms | 0.453592 | 10 lbs = 4.54 kg |
| Kilograms | Pounds | 2.20462 | 5 kg = 11.02 lbs |
| Ounces | Grams | 28.3495 | 4 oz = 113.4 g |
| Grams | Ounces | 0.035274 | 100 g = 3.53 oz |
| Stones | Kilograms | 6.35029 | 12 st = 76.2 kg |
| Kilograms | Stones | 0.157473 | 70 kg = 11.02 st |
| Tons | Pounds | 2204.62 | 2 t = 4409.2 lbs |
| Pounds | Ounces | 16 | 3 lbs = 48 oz |
Understanding Weight Measurements
Metric vs Imperial Weight Systems
The metric system uses kilograms as the base unit, with grams for smaller weights and tonnes for larger ones. The imperial system uses pounds and ounces, primarily in the US, while the UK also uses stones for body weight. Our converter handles all major weight units with scientific precision.
Common Weight Conversion Formulas
Pounds to Kilograms: multiply by 0.453592
Ounces to Grams: multiply by 28.3495
Stones to Kilograms: multiply by 6.35029
Kilograms to Pounds: multiply by 2.20462
Applications and Use Cases
Weight converters are essential for cooking (recipe scaling), shipping (package weights), fitness tracking, international trade, scientific research, and travel. Different regions use different units, making conversion tools crucial for global communication and commerce.
Frequently Asked Questions
What's the difference between mass and weight?
Mass is the amount of matter in an object (measured in kg or lbs), while weight is the force exerted by gravity on that mass. In everyday use, we often use these terms interchangeably, and our converter works for both concepts.
Why are there different types of tons?
There are three main types: metric tons (1,000 kg), US tons (2,000 lbs), and imperial tons (2,240 lbs). The metric ton is most common internationally, while US tons are used in American commerce.
How accurate are these conversions?
Our converter uses official conversion factors defined by international standards. The precision can be adjusted up to 10 decimal places, making it suitable for both everyday use and scientific applications.
What is a stone and where is it used?
A stone is a British imperial unit equal to 14 pounds or about 6.35 kg. It's commonly used in the UK and Ireland for measuring body weight. For example, someone might weigh "11 stone 3 pounds" instead of "157 pounds."