Weight Converter
Convert between different units of weight and mass including kilograms, pounds, ounces, grams, stones and more with our free weight converter tool.
Calculate Your Weight Converter
Formula: Value × 1 ÷ 0.45359237
1 Kilograms = 2.204623 Pounds
What is Weight Conversion?
Weight conversion is the process of changing a measurement from one unit of weight (or mass) to another. This is essential for international trade, cooking, science, medicine, and many other fields where different weight units are used in different contexts or regions.
Common Weight Units
Metric System
- Kilogram (kg): The base unit of mass in the metric system - used for body weight, groceries
- Gram (g): 1/1,000 of a kilogram - used for food ingredients, small items
- Milligram (mg): 1/1,000 of a gram - used for medicine, vitamins
- Metric Ton (t): 1,000 kilograms - used for heavy cargo, vehicles
Imperial/US System
- Pound (lb): Primary weight unit in the US - used for body weight, food
- Ounce (oz): 1/16 of a pound - used for food ingredients, small packages
- Stone (st): 14 pounds - commonly used for body weight in the UK
- US Ton: 2,000 pounds - used for large quantities in the US
How to Use the Weight Converter
- Enter the value you want to convert in the "Value" field
- Select the unit you're converting from in the "From" dropdown
- Select the unit you want to convert to in the "To" dropdown
- The result will automatically display in the "Result" field
- Use the swap button to quickly reverse the conversion direction
Common Conversion Factors
| From | To | Multiply By |
|---|---|---|
| Kilograms | Pounds | 2.20462 |
| Pounds | Kilograms | 0.453592 |
| Grams | Ounces | 0.035274 |
| Ounces | Grams | 28.3495 |
| Kilograms | Stone | 0.157473 |
Weight vs. Mass: What's the Difference?
Although we use these terms interchangeably in everyday language, there's a scientific difference:
- Mass is the amount of matter in an object. It doesn't change regardless of location. Units like kilograms and pounds technically measure mass.
- Weight is the force exerted on an object due to gravity. Your weight would be different on the moon but your mass would stay the same.
For everyday purposes on Earth, we use weight and mass units interchangeably since the gravitational force is relatively constant.
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Frequently Asked Questions
Mass is the amount of matter in an object and remains constant regardless of location. It's measured in units like kilograms (kg) and grams (g).
Weight is the force exerted on an object due to gravity and can vary depending on location. An object would weigh less on the moon than on Earth, but its mass would be the same.
In everyday usage on Earth, we often use mass and weight units interchangeably since Earth's gravity is relatively constant across its surface.
The appropriate unit depends on your location and recipe source:
- US recipes typically use pounds (lb) and ounces (oz)
- International/metric recipes use grams (g) and kilograms (kg)
- UK recipes might use a mix of imperial (oz, lb) and metric units
Professional chefs and bakers often prefer weight measurements in grams rather than volume measurements (cups, tablespoons) because weight provides more precision and consistency.
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