Weight / Mass Converter Online
Free online weight and mass converter. Convert between kilograms, pounds, ounces, grams, stones, and more. Instant, accurate results.
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Tip: Click any result row to instantly copy its value to clipboard
💡 Definition
Weight / Mass Converter
- Mass (commonly called weight) measures how much matter an object contains.
- The metric base unit is the kilogram (kg), while the imperial system uses pounds (lb).
- This converter handles all common weight and mass units with scientific precision.
📖 How to use
Step by Step
- Enter a value and choose your source unit from the Convert From dropdown
- All equivalent values appear instantly in the results grid
- The source unit row is highlighted in purple for clarity
- Click any result row to copy that value to your clipboard
🎯 Use cases
When to use
- Converting recipe ingredients between metric and imperial
- Shipping and postage weight calculations
- Gym and fitness tracking across unit systems
- Scientific and laboratory measurements
Frequently Asked Questions
How many pounds are in a kilogram?▾
One kilogram equals approximately 2.20462 pounds. Conversely, one pound equals approximately 0.453592 kilograms. The kilogram is the SI base unit of mass.
What is a stone?▾
A stone is an imperial unit equal to 14 pounds (approximately 6.35 kg). It is commonly used in the UK and Ireland to express body weight.
What is the difference between mass and weight?▾
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). On Earth's surface, the terms are used interchangeably in everyday language.