Metric mass units
The kilogram (kg) is the SI base unit of mass. 1 kg = 1,000 grams = 1,000,000 milligrams. The metric ton (tonne) equals 1,000 kg and is used for industrial and shipping weights.
Weight conversion
Convert any weight,
instantly.
From a single grain to a metric tonne — every common scale, side by side.
kg
2.2046226
lb1 kg = 2.2046226 lb
Quick to:
1 kg in all units
| Micrograms | 1000000000 | µg |
| Milligrams | 1000000 | mg |
| Grams | 1000 | g |
| Metric tons | 0.001 | t |
| Ounces | 35.273962 | oz |
| Pounds | 2.2046226 | lb |
| Stones | 0.15747304 | st |
| US tons (short) | 0.0011023113 | ton (US) |
| UK tons (long) | 0.00098420653 | ton (UK) |
| Carats | 5000 | ct |
| Grains | 15432.358 | gr |
About weight conversion
Weight (more precisely, mass) is measured in different units around the world. The metric system uses grams and kilograms, while imperial uses ounces, pounds and stones. This converter handles them all with full precision.
Imperial weight units
The pound (lb) is defined as exactly 0.45359237 kilograms. 1 lb = 16 oz. The stone (14 lb) is still common in the UK for body weight. US short tons and UK long tons differ by 240 lb.
Carats and grains
A carat (ct) is exactly 200 milligrams and is used for gemstones. A grain (gr) is about 64.8 mg, traditionally based on the weight of a single barley grain — still used in firearms and pharmacy.
Mass vs weight
Strictly, mass is the amount of matter (kg) and weight is the force gravity exerts on it (newtons). In everyday use the two are interchangeable, and conversions assume Earth gravity.
Frequently asked questions
- How do I convert kilograms to pounds?
- Multiply the kilogram value by 2.20462. For example, 70 kg ≈ 154.32 lb. The converter handles this instantly with full precision.
- How many ounces are in a pound?
- There are exactly 16 ounces (oz) in one pound (lb). One ounce equals about 28.3495 grams.
- What is a stone?
- A stone (st) is a British imperial unit equal to 14 pounds, or about 6.3503 kilograms. It's commonly used to express body weight in the UK and Ireland.
- What's the difference between US and UK tons?
- A US (short) ton equals 2,000 lb (≈907.18 kg). A UK (long) ton equals 2,240 lb (≈1,016.05 kg). A metric ton (tonne) is exactly 1,000 kg.