Weight Unit Converter
Convert between kilograms, grams, pounds, ounces, stones, and more instantly.
About Weight Unit Converter
Our Weight Unit Converter is a powerful and easy-to-use tool that allows you to convert weight and mass measurements between different units seamlessly. Whether you're cooking, shipping packages, working on scientific calculations, or dealing with international trade, this tool provides accurate conversions across ten commonly used weight units.
The tool supports conversions between Kilograms (kg), Grams (g), Milligrams (mg), Micrograms (μg), Metric Tons (t), Pounds (lb), Ounces (oz), Stones (st), US Tons (short tons), and Imperial Tons (long tons). All conversions are calculated with high precision and displayed instantly as you type or change units.
Convert From
How to Use
Enter the Weight Value
Type the numerical value of the weight you want to convert in the "Weight Value" field. You can enter whole numbers, decimals, or negative values. The input accepts any valid number.
Select the Original Unit
Choose the unit of your input value from the "From Unit" dropdown. Options include Kilograms, Grams, Pounds, Ounces, and more.
Select the Target Unit
Choose the unit you want to convert to from the "To Unit" dropdown. You can also use the "Swap Units" button to quickly switch between the source and target units.
View Results
Click "Convert" to see the result. The tool will display the converted value, the formula used, and all possible conversions from your original value to every supported unit.
Common Conversions
Quick links to frequently used weight conversions. Click any link to see the instant result.
Frequently Asked Questions
What are the different weight units?
Kilograms (kg): The base unit of mass in the SI system. Grams (g): 1/1000 of a kilogram. Milligrams (mg): 1/1000 of a gram. Micrograms (μg): 1/1,000,000 of a gram. Metric Tons (t): 1,000 kilograms. Pounds (lb): Imperial unit, approximately 0.4536 kg. Ounces (oz): 1/16 of a pound. Stones (st): British unit, equal to 14 pounds. US Tons: Short ton, equal to 2,000 pounds. Imperial Tons: Long ton, equal to 2,240 pounds.
How precise are the conversions?
Our converter uses high-precision mathematical calculations and displays results with up to 10 decimal places. For most practical applications, 2-4 decimal places are sufficient. You can round the result as needed for your specific use case.
What is the difference between weight and mass?
In physics, mass is the amount of matter in an object (measured in kg), while weight is the force of gravity on that mass (measured in Newtons). However, in everyday usage, "weight" commonly refers to what is technically mass. This converter handles mass/weight units as they are commonly used.
How do I convert kilograms to pounds?
To convert kilograms to pounds: pounds = kilograms × 2.20462. To convert pounds to kilograms: kilograms = pounds ÷ 2.20462. Our tool handles all these formulas automatically, so you don't need to memorize them!
What is a stone and where is it used?
A stone is a unit of weight equal to 14 pounds (approximately 6.35 kg). It is primarily used in the United Kingdom and Ireland for measuring human body weight. While not commonly used in scientific contexts, it remains popular in everyday conversation in these regions.
Is this tool free to use?
Absolutely! Our Weight Unit Converter is completely free to use, with no registration required. We believe in providing high-quality, accessible tools for students, professionals, and anyone who needs to perform weight conversions quickly and accurately.