Convert Weight and Mass Between Any Units
Weight conversions come up more often than you might think: a recipe from an American website lists ounces, an international flight sets the baggage allowance in pounds, a gym plate is marked in lbs, and a shipping company charges by the kilogram. This converter covers nine metric, US and imperial units — milligrams through to long tons — and converts both ways instantly.
How to Use the Weight Converter
- Enter the amount in the From box.
- Choose the unit you are converting from and the unit you want.
- Read the result and the formula used. Type in the result box to convert in the opposite direction, or use the swap button.
Weight Conversion Chart
| Unit | Equals |
|---|---|
| 1 kilogram (kg) | 1,000 g = 2.2046 lb = 35.274 oz |
| 1 pound (lb) | 16 oz = 453.592 g |
| 1 ounce (oz) | 28.3495 g |
| 1 stone (st) | 14 lb = 6.350 kg |
| 1 metric ton (t) | 1,000 kg = 2,204.6 lb |
| 1 US short ton | 2,000 lb = 907.185 kg |
| 1 imperial long ton | 2,240 lb = 1,016.05 kg |
| 1 gram (g) | 1,000 mg |
Everyday Examples
Body weight
If your weight is 70 kg, that is 70 × 2.2046 = 154.3 lb, or 11 stone 0.3 lb. Fitness apps and gym equipment made for the US market often use pounds, so this conversion is useful for tracking progress.
Airline baggage
A 23 kg checked bag limit is about 50.7 lb, and a 7 kg cabin bag is about 15.4 lb. Many airlines list both numbers, but weigh your bag in whichever unit your scale uses and convert here to be safe.
Cooking
An American recipe asking for 8 oz of cheese needs about 227 g. One pound of flour is roughly 454 g.
Metric vs Imperial Weight
The metric system is built on the gram and works in steps of 1,000: milligram, gram, kilogram, tonne. It is used by India and nearly every other country for trade and science.
The US customary and imperial systems are built on the pound: 16 ounces to a pound, 14 pounds to a stone (UK only), and 2,000 or 2,240 pounds to a ton depending on the country. The difference between the US and UK ton is why it is important to choose the right one in the converter.
Traditional Indian Units
- Tola: about 11.66 g, historically used for gold and silver.
- Quintal: 100 kg, used for crop yields and MSP announcements.
- Maund (man): historically about 37.3 kg, now rarely used.
Tips for Accurate Conversion
- For precious metals, remember that gold and silver are priced in troy ounces (31.10 g), not regular ounces.
- For medicine doses, always follow the unit printed on the prescription; don’t round conversions.
- Kitchen scales can be off by a few grams — for baking, use the same unit as the recipe where possible.
Related Tools
- BMI Calculator — check whether your weight is healthy for your height.
- Volume Converter — cups, millilitres and gallons for recipes.
- Length Converter — feet, inches and centimetres.