Weight Converter Guide: kg, lbs, Ounces & Stone
Weight units differ between countries — the metric system uses kg and grams, while the US and UK still widely use pounds, ounces, and stone. Here's a complete reference.
Weight Unit Reference Table
| Unit | In grams | Common use |
|---|---|---|
| Milligram (mg) | 0.001 g | Medicine, supplements |
| Gram (g) | 1 g | Cooking, jewellery |
| Kilogram (kg) | 1,000 g | Body weight, groceries |
| Metric ton | 1,000,000 g | Vehicles, cargo |
| Ounce (oz) | 28.35 g | US cooking, postal weight |
| Pound (lb) | 453.59 g | US/UK body weight, produce |
| Stone | 6,350.29 g | UK body weight |
Quick Conversions
Frequently Asked Questions
How many kilograms in a pound?
1 pound (lb) = 0.453592 kg. 1 kg = 2.20462 lbs. Quick estimate: multiply pounds by 0.45 to get kg, or multiply kg by 2.2 to get lbs.
What is a stone in kg?
1 stone = 14 pounds = 6.35029 kg. Used primarily in the UK and Ireland to measure body weight. A person weighing 70 kg = 70 ÷ 6.35 ≈ 11 stone.
How many grams in an ounce?
1 ounce (oz) = 28.3495 grams. 1 gram = 0.03527 oz. Used in cooking recipes (US). Note: a troy ounce (used for precious metals) = 31.1035 grams — different from an avoirdupois ounce.
What is the difference between mass and weight?
Mass is the amount of matter in an object (measured in kg, grams) and is constant regardless of location. Weight is the gravitational force on that mass (measured in Newtons). On the Moon, your mass is the same but your weight is 1/6 of Earth weight.
How do I convert metric tons to kilograms?
1 metric ton (tonne) = 1,000 kg = 1,000,000 grams. Note: a metric ton ≠ an imperial ton. 1 US ton (short ton) = 907.185 kg. 1 UK ton (long ton) = 1,016.05 kg.
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