Weight Converter
Convert between kg, pounds, ounces, and more
Weight Converter
Tip: Enter a value in any unit to see instant conversions to all other units.
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About Weight Converter
Convert weight measurements instantly between kilograms, pounds, ounces, grams, stones, and more with our comprehensive weight converter. Whether you're tracking fitness goals, shipping packages, following recipes, or working on international projects, accurate weight conversion is essential. This tool supports all commonly used weight units worldwide, from tiny measurements in milligrams to large weights in metric tons. Perfect for fitness enthusiasts tracking body weight, cooks following international recipes, shippers calculating package weights, travelers understanding luggage limits, and anyone needing quick, accurate weight conversions. Our converter provides instant results with multiple unit options, making it the most versatile weight conversion tool available online.
Key Features
Comprehensive Unit Support
Convert between kilograms, grams, milligrams, pounds, ounces, stones, metric tons, and more. Supports all metric and imperial weight units.
Instant Multi-Unit Results
Enter weight once and see conversions to all major units simultaneously. No need for multiple conversions - view everything at once.
High Precision Calculations
Accurate to multiple decimal places for scientific, medical, and commercial applications requiring precise measurements.
Common Weight Presets
Quick-select buttons for common weights make frequent conversions faster. Perfect for fitness tracking and package shipping.
Both Metric and Imperial
Seamlessly convert between metric system (kg, g) and imperial system (lbs, oz) used in different countries worldwide.
Mobile-Friendly Interface
Use on any device - smartphone, tablet, or computer. Perfect for on-the-go conversions at the gym, kitchen, or post office.
How to Use Weight Converter
Enter the weight value you want to convert in the input field
Enter the weight value you want to convert in the input field. Follow the tool interface to complete this step.
Select the unit you're converting FROM using the dropdown menu
Select the unit you're converting FROM using the dropdown menu. Follow the tool interface to complete this step.
View instant conversions to all other weight units automatically
View instant conversions to all other weight units automatically. Follow the tool interface to complete this step.
Use preset buttons for quick conversions of common weights
Use preset buttons for quick conversions of common weights. Follow the tool interface to complete this step.
Copy or note the converted values you need for your specific use case
Copy or note the converted values you need for your specific use case. Follow the tool interface to complete this step.
Frequently Asked Questions
How many pounds are in a kilogram?
One kilogram equals approximately 2.20462 pounds. For quick mental math, you can estimate that 1 kg ≈ 2.2 lbs. So 50 kg would be about 110 lbs, and 100 kg would be about 220 lbs.
How do I convert pounds to kilograms?
To convert pounds to kilograms, divide by 2.20462 (or multiply by 0.453592). For example, 150 pounds equals 150 ÷ 2.20462 = 68.04 kg. A quick approximation is to divide pounds by 2.2.
What is a stone in weight measurement?
A stone is a British imperial unit of weight equal to 14 pounds or approximately 6.35 kilograms. It's commonly used in the UK and Ireland for measuring human body weight. For example, someone might weigh 10 stone (140 lbs or 63.5 kg).
How many grams are in a pound?
One pound equals 453.592 grams. For practical purposes, you can round to 454 grams per pound. This conversion is frequently used in cooking and food packaging.
How many ounces are in a pound?
There are exactly 16 ounces in one pound. This is a fixed conversion in the imperial system. So half a pound equals 8 ounces, a quarter pound equals 4 ounces, and so on.
What's the difference between mass and weight?
Mass is the amount of matter in an object (measured in kg, g), while weight is the force of gravity on that mass (measured in newtons). However, in everyday use, we use 'weight' to refer to mass. Our converter handles common weight/mass units used in daily life.
Can I convert very small weights like milligrams?
Yes! Our converter handles weights from milligrams (mg) to metric tons. One gram equals 1,000 milligrams. This precision is useful for medications, supplements, jewelry, and scientific measurements.
Which countries use pounds vs kilograms?
The United States primarily uses pounds and ounces (imperial system). Most other countries, including all of Europe, use kilograms and grams (metric system). The UK uses a mix of both systems, with stones and pounds for body weight but grams and kilograms for food and shipping.
Use Cases
- Fitness and Weight Loss Tracking: Track your body weight in your preferred unit. Convert between pounds and kilograms to understand fitness programs from different countries or use gym equipment with different measurement systems.
- International Cooking and Baking: Follow recipes from around the world by converting ingredient weights. European recipes use grams and kilograms while American recipes often use pounds and ounces.
- Shipping and Logistics: Calculate package weights for shipping carriers that use different measurement systems. Ensure your packages meet weight limits and calculate accurate shipping costs.
- Travel and Luggage Planning: Airlines specify luggage limits in different units depending on the country. Convert to ensure your bags meet weight restrictions and avoid excess baggage fees.
- Scientific and Medical Applications: Scientists and healthcare professionals need precise weight conversions for medications, specimens, and research data across different measurement standards.