⚖️ Weight / Mass Converter
Convert between different weight and mass units including kilograms, pounds, grams, ounces, stones, tons, and more. Perfect for cooking, fitness, shipping, and scientific measurements.
⚖️ Weight / Mass Units Reference
Kilogram
kg
Gram
g
Milligram
mg
Metric Ton
t
Pound
lb
Ounce
oz
Stone
st
US Ton
ton
Table of Contents
What is a Weight / Mass Converter?
A weight converter (also called a mass converter) is a tool that converts measurements of weight or mass from one unit to another. Whether you need to convert kilograms to pounds, grams to ounces, or tons to metric tons, a weight converter makes these calculations instant and accurate.
Weight conversions are essential in many fields including cooking, fitness, shipping, science, and everyday life. Different countries and industries use different measurement systems (metric vs imperial), making conversions a common necessity.
Our weight converter supports 8 different units including metric units (kilograms, grams, milligrams, metric tons) and imperial units (pounds, ounces, stones, US tons), handling everything from tiny measurements to large weights.
How it Works
Our weight converter uses precise conversion factors to accurately transform values between different weight units:
- Select Units: Choose the source unit and target unit from the dropdowns
- Enter Value: Input the weight measurement you want to convert
- Instant Results: The conversion is calculated automatically in real-time
- Swap Units: Click the swap button to reverse the conversion direction
The converter works by first converting to a base unit (kilograms), then converting to the target unit. All conversions use standard, internationally recognized conversion factors for maximum accuracy.
Supported Units
Metric Units
- Kilogram (kg) - Base unit
- Gram (g) - 0.001 kilograms
- Milligram (mg) - 0.000001 kilograms
- Metric Ton (t) - 1,000 kilograms
Imperial Units
- Pound (lb) - 0.453592 kilograms
- Ounce (oz) - 0.0283495 kilograms
- Stone (st) - 6.35029 kilograms
- US Ton (ton) - 907.185 kilograms
Common Use Cases
- Cooking & Baking: Convert recipe measurements between grams, ounces, pounds, and kilograms
- Fitness & Health: Convert body weight between pounds and kilograms for tracking and goal setting
- Shipping & Logistics: Convert package weights and shipping calculations between units
- Science & Research: Convert laboratory measurements and scientific data between metric and imperial units
- Retail & Commerce: Convert product weights for international markets and labeling requirements
- Agriculture: Convert crop yields, livestock weights, and agricultural measurements
- Manufacturing: Convert material weights and specifications for production
Conversion Examples
Pounds to Kilograms
1 pound = 0.453592 kilograms
Example: 150 pounds is approximately 68.04 kilograms. A 200-pound person weighs approximately 90.72 kilograms.
Ounces to Grams
1 ounce = 28.3495 grams
Example: A 16-ounce package is approximately 453.59 grams. A 4-ounce serving is approximately 113.4 grams.
Stones to Kilograms
1 stone = 6.35029 kilograms
Example: 10 stone is approximately 63.5 kilograms. 15 stone is approximately 95.25 kilograms.
Tons to Metric Tons
1 US ton = 0.907185 metric tons
Example: A 2-ton vehicle weighs approximately 1.81 metric tons. A 10-ton shipment is approximately 9.07 metric tons.
Frequently Asked Questions
In everyday use, "weight" and "mass" are often used interchangeably, but they're technically different. Mass is the amount of matter in an object (constant), while weight is the force exerted by gravity on that mass (varies with location). For practical purposes, our converter treats them the same and uses standard conversion factors.
A US ton (short ton) is 2,000 pounds (907.185 kg), while a metric ton (tonne) is 1,000 kilograms (2,204.62 pounds). The metric ton is about 10% heavier than the US ton. There's also a UK ton (long ton) which is 2,240 pounds, but our converter uses the US ton.
There are 16 ounces in a pound. This is a standard conversion: 1 pound = 16 ounces = 453.592 grams = 0.453592 kilograms.
No. All conversions happen entirely in your browser. We don't store, log, or transmit any values you enter. Your calculations are completely private.