Weight Converter
Convert between mass / weight units
rate：1 ct = 0.0002 kg
Results in all units
4 ct| Unit | Symbol | Value |
|---|---|---|
| Metric | ||
| Metric tons | t | 8e-7 |
| Kilograms | kg | 0.0008 |
| Hectograms | hg | 0.008 |
| Grams | g | 0.8 |
| Decigrams | dg | 8 |
| Centigrams | cg | 80 |
| Milligrams | mg | 800 |
| Micrograms | μg | 800,000 |
| Imperial / US | ||
| Short tons (US) | ton (US) | 8.81849e-7 |
| Long tons (UK) | ton (UK) | 7.873652e-7 |
| Hundredweights (US) | cwt (US) | 0.000018 |
| Hundredweights (UK) | cwt (UK) | 0.000016 |
| Stones | st | 0.000126 |
| Pounds | lb | 0.001764 |
| Ounces | oz | 0.028219 |
| Drams | dr | 0.451507 |
| Grains | gr | 12.345887 |
| Chinese traditional | ||
| Dan | 担 | 0.000016 |
| Jin | 斤 | 0.0016 |
| Liang | 两 | 0.016 |
| Qian | 钱 | 0.16 |
| Kilogram (gongjin) | 公斤 | 0.0008 |
| Other | ||
| Carats | ct | 4 |
| Slugs | slug | 0.000055 |
About Weight Conversion
4 Carats equals 0.0008 Kilograms. The conversion rate is 1 ct = 0.0002 kg. You can switch to any other unit of this category above and see the result instantly.
This converter supports 24 units in total, including Metric tons, Kilograms, Hectograms, Grams, and covers metric, imperial and Chinese traditional systems.
Weight conversion is widely used in logistics, trade, and scientific experiments. When buying overseas goods, you might need to convert pounds (lb) and ounces (oz) to kilograms and grams. In precious metal trading (like gold and diamonds), carats (ct) and grains (gr) are essential pricing units.
All values follow internationally accepted definitions and are rounded to the decimals you choose. The calculation runs entirely in your browser, so nothing is uploaded or stored on a server.
History & Background
Historically, weight measurement went hand in hand with early commercial trade. Ancient Romans used scales, giving rise to the word "Pound". In China, after unifying the six states, Qin Shi Huang standardized weights and measures, establishing the traditional 16-liang-per-jin system.
Conversion Details
Weight (mass) conversion is based on the kilogram (kg).
Common conversions: 1 lb ≈ 0.4536 kg, 1 oz ≈ 28.35 g, 1 jin = 500 g.