Weight Converter
Enter a weight and its unit to see the equivalent in milligrams, grams, kilograms, metric tonnes, ounces, and pounds.
How weight conversion works
Metric weight units scale by powers of 10 (1 kg = 1000 g = 1,000,000 mg), so converting between them is just moving the decimal point.
Ounces and pounds relate to the metric system by fixed factors: 1 ounce is exactly 28.349523125 grams, and 1 pound is exactly 453.59237 grams (16 ounces). This calculator uses those exact factors.
Frequently asked questions
How many grams are in a pound?
1 pound equals exactly 453.59237 grams, which is often rounded to about 453.6 grams.
How do I convert kilograms to pounds?
Multiply the number of kilograms by 2.20462 to get pounds, since 1 kilogram equals approximately 2.20462 pounds.
What's the difference between an ounce and a troy ounce?
This calculator uses the standard (avoirdupois) ounce, equal to 28.349523125 grams — the troy ounce used for precious metals is a different, slightly heavier unit (about 31.1 grams).