Metric Units
Convert tons, kilograms, grams, milligrams and micrograms.
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Free Weight & Mass Converter
Weight Converter Convert Mass Units Instantly
Convert kilograms, pounds, ounces, grams, stone, tons and other weight and mass units quickly and accurately.
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Metric Units
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Imperial Units
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US Customary Units
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Instant Results
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Free Tool
Convert Weight Units
Enter a value and choose your units
Popular Conversions
Choose a common weight conversion
Quick Reference
Common Weight Conversions
Popular metric, imperial and US customary conversion values for quick reference.
| Conversion | Equivalent |
|---|---|
| 1 metric ton | 1,000 kilograms |
| 1 kilogram | 1,000 grams |
| 1 gram | 1,000 milligrams |
| 1 pound | 0.45359237 kilograms |
| 1 pound | 16 ounces |
| 1 ounce | 28.349523125 grams |
| 1 stone | 14 pounds |
| 1 carat | 0.2 grams |
Converter Features
Convert Weight Units with Ease
Imperial Units
Convert pounds, ounces, stone and long tons instantly.
Instant Conversion
Get fast results with formulas and reverse conversions.
Multiple Results
See your entered amount converted into every supported unit.
Simple Process
How to Use the Weight Converter
Enter a Value
Type the weight or mass value you want to convert.
Select Units
Choose the original unit and the target unit.
View the Result
Get the converted value, formula and equivalent units.
Weight Conversion Guide
Free Online Weight Converter
Our free online weight converter helps you convert values between common metric, imperial and US customary mass units. Enter a value, select the original unit and choose the unit you want to convert into.
The tool supports popular conversions such as kilograms to pounds, pounds to kilograms, grams to ounces, ounces to grams, stone to kilograms and tons to pounds.
What Is Weight Conversion?
In everyday language, weight conversion usually refers to converting a measured amount between units such as kilograms, pounds, ounces and stone. More precisely, these units are commonly used to express mass.
A unit conversion does not change the amount being measured. It changes only the numerical value and measurement unit used to represent it.
Metric Mass Units
Common metric mass units include metric tons, kilograms, hectograms, grams, milligrams and micrograms. Metric conversions are convenient because the relationships are based on powers of ten.
For example, one metric ton equals 1,000 kilograms, one kilogram equals 1,000 grams and one gram equals 1,000 milligrams.
Pounds, Ounces and Stone
Pounds and ounces are widely used in everyday measurements in several countries. One pound contains 16 avoirdupois ounces, while one stone contains 14 pounds.
Stone is commonly associated with personal body weight measurements in the United Kingdom and some other contexts.
How to Convert Kilograms to Pounds
To convert kilograms to pounds, multiply the kilogram value by approximately 2.20462262185. For example, 10 kilograms is approximately 22.0462262185 pounds.
How to Convert Pounds to Kilograms
To convert pounds to kilograms, multiply the pound value by 0.45359237. For example, 10 pounds equals 4.5359237 kilograms.
How to Convert Ounces to Grams
To convert avoirdupois ounces to grams, multiply the ounce value by approximately 28.349523125. For example, 10 ounces is approximately 283.49523125 grams.
Common Uses of a Weight Converter
A weight converter can be useful for shipping, fitness tracking, recipes, international product specifications, education, science, manufacturing, logistics, travel and everyday calculations.
Conversion Tip
Keep extra decimal places during intermediate calculations and round only the final answer when precision matters.
FAQ
Frequently Asked Questions
Enter a value, select the original unit,
choose the target unit and click Convert Weight.
Yes. Select Kilogram as the source unit
and Pound as the target unit.
Yes. Choose Pound as the source unit
and Kilogram as the target unit.
Supported units include metric tons,
kilograms, hectograms, grams, milligrams,
micrograms, pounds, ounces, stone,
US short tons, UK long tons and carats.
Yes. The weight converter is free
to use directly in your browser.