Weight Converter
Convert between metric and imperial weights with exact factors.
Convert weights and masses between milligrams, grams, kilograms, ounces, pounds, and metric tons. Uses the exact international pound (0.45359237 kg), so results match official conversion tables.
How it's calculated
Every unit converts through grams with its exact factor: 1 ounce = 28.349523125 g, 1 pound = 453.59237 g, 1 metric ton = 1,000,000 g. The result is value × factor[from] ÷ factor[to].
Frequently asked questions
How many pounds are in a kilogram?
About 2.20462 lb. The exact factor is 1 kg = 2.20462262185 lb.
How many ounces are in a pound?
16 ounces. Enter 16, choose oz → lb, and you get exactly 1 — the avoirdupois ounce is defined as 1/16 of a pound.
Which ounce and pound does this use?
These are the avoirdupois ounces and pounds used in everyday and commercial weighing — the same system as US and UK food labels and bathroom scales.