Weight Converter
Convert between kilograms, pounds, ounces, grams and more.
Convert between kilograms, grams, pounds, ounces, stones and tonnes instantly. Useful for recipes, shipping, fitness and travel.
Formula / method
Examples
2.2046 lb
4.5359 kg
7.0548 oz
Kilograms, pounds and more
Weight (strictly, mass) is another place where metric and imperial diverge daily: kilograms and grams against pounds and ounces. This converter switches between them instantly for cooking, shipping, fitness and travel.
Exact conversion factors
The units are linked by fixed definitions, so results are precise: one pound is exactly 0.45359237 kilograms, and one kilogram is about 2.2046 pounds. There are 16 ounces in a pound and 1000 grams in a kilogram. Enter any value and read the converted result immediately.
Where it's used
- Converting recipe ingredient weights between grams and ounces
- Checking luggage or parcel weight against airline and courier limits in kg and lb
- Logging body weight or gym plate loads across metric and imperial
- Reading nutrition labels or medication doses given in different units
- Converting shipping weights for international orders and customs forms
Real-world examples
- A US recipe calling for 8 oz of butter converts to about 227 g for a kitchen scale set to metric.
- A suitcase weighing 23 kg converts to about 50.7 lb, right at a typical airline checked-bag limit.
- A 5 lb dumbbell converts to roughly 2.27 kg for a training log kept in metric.
A bit of history
The international avoirdupois pound was fixed at exactly 0.45359237 kilograms by the International Yard and Pound Agreement, signed on 1 July 1959 by the United States, United Kingdom, Canada, Australia, New Zealand, and South Africa.
Did you know?
The stone, equal to 14 pounds, is still a common way to state body weight in the UK and Ireland, even though it is rarely used elsewhere in the world.
FAQ
Is 1 pound exactly 0.45359237 kg?
Yes — the international avoirdupois pound is defined as exactly 0.45359237 kilograms.