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.

All Weight & Mass Conversion Pairs

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

ConversionFormula
Grams to Kilogramskg = g × 0.001 ÷ 1
Grams to Ouncesoz = g × 0.001 ÷ 0.0283495231
Kilograms to Gramsg = kg × 1 ÷ 0.001
Kilograms to Poundslb = kg × 1 ÷ 0.45359237
Metric tons to Kilogramskg = t × 1000 ÷ 1
Ounces to Gramsg = oz × 0.0283495231 ÷ 0.001
Pounds to Kilogramskg = lb × 0.45359237 ÷ 1
Pounds to Ouncesoz = lb × 0.45359237 ÷ 0.0283495231

Weight & Mass Reference Table

The exact mass of one unit expressed in kilograms.

UnitSymbolKilograms
Milligrammg0.000001
Gramg0.001
Kilogramkg1
Metric tont1000
Ounceoz0.0283495231
Poundlb0.45359237
Stonest6.35029318

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 matters

Metric 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.

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.