Weight Converter
Convert kg, lbs, grams, ounces and stones.
Convert Kilograms, Pounds, and Every Other Weight Unit
This weight converter handles every common mass unit — milligrams, grams, kilograms, tonnes (metric), ounces, pounds, and stones. Type a value, select the source unit, and pick your target unit to see the result instantly. All conversions use the internationally agreed factor of 1 pound = 0.45359237 kg.
Quick Conversion Reference
- 1 kilogram = 2.20462 pounds
- 1 pound = 0.453592 kilograms
- 1 stone = 14 pounds = 6.35029 kilograms
- 1 ounce = 28.3495 grams
- 1 tonne = 1,000 kilograms = 2,204.62 pounds
Where This Converter Helps
If you lift weights and your plates are in kilos but online programs use pounds, you need a quick conversion. If you ship internationally, parcel weight is often listed in both pounds and kilograms. Recipes from the UK sometimes measure flour in ounces; recipes from Europe use grams. Shipping, cooking, fitness, medical dosages — accurate weight conversion comes up everywhere.
Mass vs. Weight
Technically, "weight" is the force gravity exerts on a mass and is measured in newtons. In daily usage, however, people use "weight" and "mass" interchangeably, and units like kilograms and pounds refer to mass. This converter follows the common usage.
Accuracy
Every factor is taken from the International System of Units (SI) and results are precise to eight decimal places — more than enough for cooking, shipping, and fitness logs.