Lbs to kg converter

kg = lb × 0.45359237 and lb = kg × 2.20462.

The international pound is defined as exactly 0.45359237 kg. For quick mental math, divide pounds by 2.2: 154 lb ÷ 2.2 ≈ 70 kg. The converter uses the exact factor, so you get 69.85 kg.

And the other way: 1 kg = 2.205 lb, 50 kg = 110.2 lb, 70 kg = 154.3 lb, 100 kg = 220.5 lb.

In the US, smaller weights are often written in pounds and ounces. There are 16 ounces in a pound, and 1 ounce is 28.35 grams. A baby that weighs 7 lb 8 oz weighs 7.5 lb, which is 3.40 kg.

To convert, turn the ounces into a decimal first (8 oz = 0.5 lb), then enter the total. For ounces alone, the ounces to grams converter is quicker.

British sources often give body weight in stone. One stone is 14 pounds, or 6.35 kg. 11 stone 6 lb is 160 lb, or 72.6 kg. The stone to kg converter accepts stone and pounds together.

• Luggage limits: a 50 lb checked-bag limit is 22.7 kg; a 23 kg limit is 50.7 lb.
• Gym weights: a 45 lb barbell plate is 20.4 kg, while a 20 kg plate is 44.1 lb.
• Medication and nutrition: doses are often given per kilogram of body weight.
• Shipping: carriers price by weight in pounds in the US and in kilograms almost everywhere else.

The calculation happens in your browser; nothing is sent to a server.

Outside the US, almost everything is sold by the kilogram: produce at the market, flour in 1 kg bags, and body weight on medical forms. Half a kilo (500 g) is about 1.1 lb, and a liter of water weighs almost exactly 1 kg, which makes it a useful reference when you need to picture a metric weight.

Bathroom scales usually show body weight to the nearest 0.2 lb or 0.1 kg, so one decimal place is plenty for everyday use. Kitchen and postal scales work in smaller steps; switch to grams or ounces for those. Use the decimal place buttons to choose how many digits you see, from 0 to 8. The copy button copies the number without thousands separators, so you can paste it straight into a spreadsheet.

If you're converting a long list of weights, remember that rounding each value first and then adding them up can drift from the exact total. Convert the total instead, or keep at least two decimals while you work.