Convert weight and mass between kilograms, pounds, stone, ounces, and tonnes. All units update at once in the table below — perfect for fitness, cooking, or shipping.
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How to use
Enter a numeric value in the "Value to Convert" field.
Select the unit you are converting from (e.g. kg).
Select the target unit (e.g. lbs) — the result appears instantly.
Tap ⇄ to swap from and to units.
The full conversion table shows all units simultaneously.
Frequently Asked Questions
How many pounds are in a kilogram?
1 kilogram equals approximately 2.20462 pounds. So 70 kg ≈ 154.3 lbs.
How many kilograms is 1 stone?
1 stone equals 6.35029 kilograms, or 14 pounds. Stone is primarily used in the UK and Ireland for body weight.
What is the difference between weight and mass?
Mass is the amount of matter in an object (measured in kg), while weight is the force of gravity on that mass (measured in Newtons). In everyday use, these terms are interchangeable.
How many ounces are in a pound?
There are exactly 16 ounces in 1 pound (avoirdupois). 1 pound = 453.59 grams.
How do I convert kg to lbs quickly?
Multiply kilograms by 2.205 for a quick estimate. For example, 50 kg × 2.205 ≈ 110.2 lbs.
Did you know?
The kilogram was originally defined in 1795 as the mass of one litre of water at 4°C. Since 2019 it is defined by fixing the Planck constant.
The stone (14 pounds) is still used for body weight in the UK and Ireland, even though both countries officially use metric units for most purposes.
The heaviest animal ever recorded was a blue whale weighing approximately 190 tonnes — equivalent to about 30 African elephants.