Weight Converter
kg · lb · g · oz · t · st · mg · mcg
Convert weight and mass units instantly — kilograms, pounds, grams, ounces, stone, tonnes and more. Works for fitness, cooking, shipping, and science. No signup required.
| Unit | Name | Value |
|---|
About the Weight Converter
Weight (more precisely, mass) is measured in different units around the world. The metric system — kilograms, grams, and tonnes — is used in most countries, while the imperial system — pounds, ounces, and stones — remains common in the US, UK, and some Commonwealth nations.
This converter handles 13 units including everyday measures like kg and lb, precious-metal measures like carats and tolas, and large measures like metric tonnes and US short tons.
| Base SI unit | Kilogram (kg) |
| 1 kg | 2.20462 lb / 1,000 g |
| 1 stone | 14 lb / 6.35029 kg |
| 1 metric tonne | 1,000 kg / 2,204.62 lb |
| 1 carat | 0.2 g (gemstones) |
| 1 tola | 11.6638 g (South Asia) |
Quick Reference Conversions
Worked Examples
70 kg to lb
150 lb to kg
500 g to oz
2 stone to kg
Who Uses the Weight Converter?
Gym & Fitness
Track bodyweight in kg or lb, compare lifting records, and follow international workout plans.
Cooking & Baking
Convert recipe ingredient weights between grams and ounces for US and metric cookbooks.
Shipping & Logistics
Calculate parcel weights in kg or lb to determine courier costs and meet shipping limits.
Medical & Healthcare
Convert patient body weight between kg and lb for dosage calculations and medical charts.
Travel
Check baggage allowance in kg when flying internationally, or convert to lb for US airlines.
Science & Lab
Work in grams, milligrams, and micrograms for precise chemical measurements and experiments.
Mental Math Tips
kg to lb (quick)
Multiply kilograms by 2.2 for a fast approximation. E.g. 80 kg ≈ 176 lb.
lb to kg (quick)
Halving pounds gives a rough kg value. E.g. 160 lb ÷ 2 = 80 kg (exact: 72.6 kg).
Stone shortcut
A stone is always 14 pounds. So 10 stone = 140 lb = approx 63.5 kg.