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Weight & Mass Converter

56 conversions available

Convert between kilograms, pounds, ounces, grams, stones and more.

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Kilograms → Grams Kilograms → Milligrams Kilograms → Pounds Kilograms → Ounces Kilograms → Stones Kilograms → Metric Tons Kilograms → US Tons Grams → Kilograms Grams → Milligrams Grams → Pounds Grams → Ounces Grams → Stones Grams → Metric Tons Grams → US Tons Milligrams → Kilograms Milligrams → Grams Milligrams → Pounds Milligrams → Ounces Milligrams → Stones Milligrams → Metric Tons Milligrams → US Tons Pounds → Kilograms Pounds → Grams Pounds → Milligrams Pounds → Ounces Pounds → Stones Pounds → Metric Tons Pounds → US Tons Ounces → Kilograms Ounces → Grams Ounces → Milligrams Ounces → Pounds Ounces → Stones Ounces → Metric Tons Ounces → US Tons Stones → Kilograms Stones → Grams Stones → Milligrams Stones → Pounds Stones → Ounces Stones → Metric Tons Stones → US Tons Metric Tons → Kilograms Metric Tons → Grams Metric Tons → Milligrams Metric Tons → Pounds Metric Tons → Ounces Metric Tons → Stones Metric Tons → US Tons US Tons → Kilograms US Tons → Grams US Tons → Milligrams US Tons → Pounds US Tons → Ounces US Tons → Stones US Tons → Metric Tons

Most popular weight conversions

The most searched weight conversions are kg to lbs, grams to ounces, and stones to kg. One kilogram equals about 2.205 pounds, one ounce is 28.35 grams, and one stone is 6.35 kg. These dominate cooking, fitness, and shipping.

Understanding weight units

The kilogram is the metric base unit, while pounds and ounces lead in the US, and stones remain common for body weight in the UK. Metric tons (1,000 kg) and US tons (2,000 lb) differ by about 10%, so confusing them is a costly mistake in freight and trade.

Quick reference

1 kg = 2.205 lb · 1 lb = 0.4536 kg · 1 oz = 28.35 g · 1 stone = 6.35 kg · 1 metric ton = 1,000 kg · 1 US ton = 907 kg. Use the converter for any exact value.

Quick reference: common weight conversions

1 ounce 28.35 g
1 pound 453.6 g (16 oz)
1 kilogram 2.205 lb
1 stone 6.35 kg (14 lb)
1 US ton 907.2 kg
1 metric tonne 1,000 kg (2,205 lb)
1 gram 0.035 oz
100 grams 3.53 oz

Frequently asked questions

How many pounds is a kilogram?

One kilogram equals 2.205 pounds. A quick mental trick: double the kilograms and add 10% — 70 kg becomes 140 + 14 = 154 lb.

What is a stone and who uses it?

A stone is 14 pounds (6.35 kg), used mainly in the UK and Ireland for body weight. A person weighing 11 stone weighs 154 lb or about 70 kg.

Is a US ton the same as a metric tonne?

No. A US (short) ton is 907.2 kg, while a metric tonne is exactly 1,000 kg. The UK long ton (1,016 kg) is a third, older variant.