Weight Converter
Convert kg to lbs, grams to ounces, stone to kilograms and every other weight unit instantly.
This weight converter switches any mass value between metric and imperial units as soon as you type. It handles the conversions people search for most — kg to lbs at the gym, grams to ounces in the kitchen, and stone to kilograms for body weight — with exact, internationally defined factors.
About the weight converter
Weight in everyday use means mass — the amount of matter in an object. The metric system measures mass in grams and kilograms, while the imperial and US customary systems use ounces, pounds and stones. Kitchen scales, shipping labels, fitness apps and medical charts frequently mix these units, which is why converting between them quickly matters.
All values here are anchored to the kilogram, the SI base unit of mass. One pound is defined as exactly 0.45359237 kilograms and one ounce as one-sixteenth of a pound, so the numbers are exact by definition. The stone, still common in the UK and Ireland for body weight, equals 14 pounds or about 6.35 kilograms. Enter a figure once and see it in every unit at the same time.
How to use this weight converter
- Enter the weight you want to convert in the value box.
- Choose the unit you are starting from (for example, kilograms).
- Choose the unit you want the result in (for example, pounds).
- The converted weight appears immediately as you type.
- Tap the swap arrows to flip the direction, or use the "all units" grid to compare every unit at once.
Weight conversion factors
Exact reference factors used by this converter:
Supported weight units
- tMetric tonne
- kgKilogram
- gGram
- mgMilligram
- lbPound
- ozOunce
- stStone
- tonUS ton (short)
- long tonUK ton (long)
Frequently asked questions
How do I convert kg to lbs?
Multiply kilograms by 2.204623 to get pounds. For example, 70 kg × 2.204623 ≈ 154.32 lb. To convert pounds back to kilograms, multiply by 0.453592.
How many grams are in an ounce?
One ounce equals about 28.3495 grams. To convert ounces to grams multiply by 28.3495; to convert grams to ounces multiply by 0.035274.
How do I convert stone to kg?
Multiply stone by 6.350293 to get kilograms, since one stone is 14 pounds. So 11 stone ≈ 69.85 kg. The converter also splits or combines stones and pounds via the pound unit.
Is weight the same as mass?
In physics, mass measures matter and weight measures the force of gravity on that mass. In everyday use — scales, recipes, body weight — the two words are used interchangeably, and that is what this converter handles.
Why are there two kinds of ton?
The US short ton is 2,000 pounds (about 907 kg), the UK long ton is 2,240 pounds (about 1,016 kg), and the metric tonne is exactly 1,000 kg. This tool includes all three so you can pick the right one.