Weight & Mass Converter
Convert between kilograms, pounds, grams, ounces and more instantly. Choose a conversion pair below, or use the quick converter to get your answer right now.
What is a Weight & Mass Converter?
A weight and mass converter translates measurements between metric and imperial units. Use it for recipes, parcels, product specifications and everyday measurements.
Choose from kilograms, grams, milligrams, metric tons, pounds, ounces and stone.
How to Convert Weight & Mass Units
Convert the source value to kilograms, then divide by the target unit’s kilogram factor.
Grams to Kilograms
kg = g × 0.001 ÷ 1
Example: 10 g = 0.01 kg
Grams to Ounces
oz = g × 0.001 ÷ 0.0283495231
Example: 10 g = 0.3527396195 oz
Kilograms to Grams
g = kg × 1 ÷ 0.001
Example: 10 kg = 10000 g
Kilograms to Pounds
lb = kg × 1 ÷ 0.45359237
Example: 10 kg = 22.0462262185 lb
Weight Conversion Formula Table
| Conversion | Formula |
|---|
| Grams to Kilograms | kg = g × 0.001 ÷ 1 |
| Grams to Ounces | oz = g × 0.001 ÷ 0.0283495231 |
| Kilograms to Grams | g = kg × 1 ÷ 0.001 |
| Kilograms to Pounds | lb = kg × 1 ÷ 0.45359237 |
| Metric tons to Kilograms | kg = t × 1000 ÷ 1 |
| Ounces to Grams | g = oz × 0.0283495231 ÷ 0.001 |
| Pounds to Kilograms | kg = lb × 0.45359237 ÷ 1 |
| Pounds to Ounces | oz = lb × 0.45359237 ÷ 0.0283495231 |
Weight & Mass Reference Table
The exact mass of one unit expressed in kilograms.
| Unit | Symbol | Kilograms |
|---|
| Milligram | mg | 0.000001 |
| Gram | g | 0.001 |
| Kilogram | kg | 1 |
| Metric ton | t | 1000 |
| Ounce | oz | 0.0283495231 |
| Pound | lb | 0.45359237 |
| Stone | st | 6.35029318 |
Understanding Weight & Mass Units
Metric units
A kilogram contains 1,000 grams, a gram contains 1,000 milligrams, and a metric ton contains 1,000 kilograms.
Pounds, ounces and stone
One avoirdupois pound equals 16 ounces or exactly 0.45359237 kilograms. One stone equals 14 pounds.
Unit mattersMetric tons are different from short tons and long tons. Troy ounces are different from the ounces used here.
Everyday Uses of Weight Conversion
Cooking & Baking
Translate ingredient masses between grams, kilograms, ounces and pounds. Cups measure volume and need an ingredient-specific density to convert to mass.
Shipping & Shopping
Compare package weights and product quantities across measurement systems.
Science & Engineering
Express laboratory and material measurements in a consistent unit before calculating.
Popular Weight Conversion Pairs
Quick access to commonly used mass conversions.
Why Use Our Weight & Mass Converter?
Use consistent conversion factors and see the calculation behind your result.
- Instant calculations
- Mobile-friendly design
- Formulas and conversion tables
- Seven commonly used mass units
- No signup required
Frequently Asked Questions
How do I convert kilograms to pounds?
Divide the kilogram value by 0.45359237. For example, 1 kg is approximately 2.2046226218 lb.
How many grams are in a kilogram?
One kilogram equals exactly 1,000 grams. Multiply kilograms by 1,000 to get grams.
Which pounds and ounces does this converter use?
This converter uses avoirdupois pounds and ounces. One pound equals 16 ounces; a troy ounce is a different unit and is not included.
What is a metric ton?
A metric ton, also called a tonne, is exactly 1,000 kilograms. It is different from a US short ton or an imperial long ton.
Is weight the same as mass?
Mass describes the amount of matter, while weight is a force affected by gravity. This tool converts mass units commonly called weight in everyday use.
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