Weight Converter: Pounds to kg Body Weight Fitness, Ounces to Grams Baking, Carats to Grams Diamond
Convert between milligrams, grams, kilograms, tonnes, pounds, ounces, carats and Chinese jin/liang/qian/dan. Enter a value to get precise, multi-decimal results across every unit at once, with a one-tap swap between units, one-click copy, and an all-units summary. Handy for cooking, shipping, precious metals and international trade.
Weight conversion
Weight Convert
All units overview
All Units Overview
How to Use
Weight Converter Guide
Metric / Chinese / Imperial
The weight (mass) converter covers 11 common units across the metric, imperial and Chinese traditional systems, suitable for cooking and baking, shipping and logistics, precious-metal trading, jewelry, international trade and everyday shopping. Metric is based on the kilogram, imperial is represented by the pound and ounce, and Chinese units include jin, liang, qian and dan. Enter any value to instantly convert all units — no need to toggle between dropdowns — which is especially useful for recipes, cross-border shopping and reading international materials.
01 Unit systems
Metric is based on the kilogram (kg): 1 tonne = 1000 kg, 1 gram = 0.001 kg, 1 milligram = 0.000001 kg — the global standard for science and commerce. In imperial, 1 pound (lb) = 0.45359237 kg (exact international value), 1 ounce (oz) ≈ 28.35 g, and the carat (ct) is used for gemstones and pearls at 1 carat = 0.2 g = 200 mg.
The Chinese jin-liang system remains widely used in daily shopping and agricultural trade: 1 jin (市斤) = 500 g = 10 liang, 1 liang (市两) = 50 g = 10 qian, 1 qian (市钱) = 5 g, 1 dan (市担) = 50 kg. Note that the Hong Kong/Taiwanese “jin” (stone catty) is about 605 g and differs from mainland China; this tool uses the mainland standard of 500 g.
- 1 kg = 2.2046 lb = 2 jin
- 1 lb = 0.45359237 kg (international pound)
- 1 oz ≈ 28.35 g
- 1 ct = 0.2 g (gemstone carat)
- 1 jin = 500 g = 10 liang
02 How to use
Enter a value and choose the source unit (e.g. kilograms) on the left; the right instantly shows the target unit (e.g. pounds), and the all-units overview below lists every unit — milligrams, grams, tonnes, jin, liang, pounds, ounces and more. Click unit buttons to switch, the swap button reverses source/target. If a recipe uses ounces or cups, convert them to grams here for precise weighing.
Inputs and actions
- value fieldEnter the numeric amount to convert; results update instantly.
- unit buttonsTap a unit to set it as source (left) or target (right); the active pair is highlighted.
- ⇄ SwapReverses the source and target units in one click.
- CopyCopies the full "X unit = Y unit" result to the clipboard.
- ResetRestores the default source/target units and value.
Output
- target resultThe converted value in the selected target unit (read-only).
- rate tipShows the forward and reverse conversion factors.
- all unitsLists the value converted into every available unit at once; source is green, target blue.
- 1 lb = 0.45359237 kg is the exact international standard
- The carat is only for gemstones and pearls, 1 ct = 0.2 g
- Mainland China 1 jin = 500 g; the Hong Kong/Taiwan catty is about 605 g
- This tool uses the metric tonne (1000 kg); the long ton is ~1016 kg and short ton ~907 kg
FinCompute’s free online weight (mass) converter covers 11 units across metric, imperial and Chinese systems. Whether you need pounds to kg for body-weight fitness tracking, ounces to grams for baking, or carats to grams for a diamond, enter any value and see every unit at once.
Metric weight: milligrams, grams, kilograms, tonnes for nutrition and dosing
Metric is based on the kilogram: 1 tonne = 1000 kg, 1 g = 0.001 kg, 1 mg = 0.000001 kg — the global standard for science, commerce and medicine. The kilogram was redefined in 2019 using Planck’s constant rather than a physical artifact, but the practical value remains unchanged.
Imperial weight: pounds, ounces, carats — fitness, baking and diamonds
1 pound (lb) = 0.45359237 kg (exact international value), 1 ounce (oz) = 1/16 lb ≈ 28.35 g, and 1 carat (ct) = 0.2 g, used for gemstones and pearls. Fitness users convert pounds to kg for body weight; bakers convert ounces to grams; jewelers convert carats to grams for diamonds.
Chinese weight: jin, liang, qian, dan for markets and Chinese herbs
In mainland China 1 jin = 500 g = 10 liang, 1 liang = 50 g = 10 qian, 1 dan = 50 kg, widely used in daily shopping, markets and agricultural trade. Chinese medicine uses liang/qian for dosing; the converter includes qian and dan alongside jin and liang.
Common weight conversions: fitness, baking, gems, freight and gold
Cooks convert ounces to grams for baking recipes; online shoppers compare pound and kilogram product weights; jewelers use carats for diamonds and troy ounces for gold; shippers need kg/lb for courier labels; fitness users track body weight in both kg and lb; international trade requires tonnes and long/short tons for bulk commodities.
Weight conversion formulas: international pound fixed at exactly 0.45359237 kg
Pounds to kg: kg = lb × 0.45359237. Ounces to grams: g = oz × 28.349523. Carats to grams: g = ct × 0.2. Jin to kg: kg = jin × 0.5. Tonnes to pounds: lb = tonnes × 2204.623. The international avoirdupois pound was fixed at exactly 0.45359237 kg by the 1959 International Yard and Pound Agreement.
Last updated: 2026-08-23
FAQ
QHow many kg in a pound?
1 lb = 0.45359237 kg by the exact international pound definition (since 1959).
QIs the Chinese jin the same as in Hong Kong?
No. Mainland 1 jin = 500 g; the Hong Kong/Taiwan stone catty is about 605 g. This tool uses the mainland standard.
QHow many grams in an ounce?
1 avoirdupois ounce ≈ 28.35 g; a troy ounce (precious metals) ≈ 31.10 g. This tool uses the avoirdupois ounce.
QWhat is a carat?
The carat (ct) is used for gemstones and pearls; 1 ct = 0.2 g = 200 mg.
QWhat is the difference between a ton and a tonne?
A metric tonne = 1000 kg (≈2204.6 lb). A US (short) ton = 2000 lb (≈907.2 kg). A UK (long) ton = 2240 lb (≈1016 kg). Always check which applies.
QHow many grams in a troy ounce of gold?
1 troy ounce = 31.1034768 g, used for gold, silver and other precious metals. This is about 10% heavier than a standard avoirdupois ounce (28.35 g).
QHow do I convert body weight from kg to pounds?
Multiply kg by 2.20462. For example, 70 kg ≈ 154.3 lb. To convert pounds to kg, multiply by 0.4536.
QHow many ounces are in a gram for baking?
1 avoirdupois ounce ≈ 28.35 g. For a baking recipe, divide grams by 28.35 to get ounces, or just type the gram value into the converter to see ounces and all other units.
QHow many grams is a carat?
1 carat = 0.2 g = 200 mg, used for diamonds and gemstones. A 1.5-carat diamond weighs 0.3 g. Enter the carat value to see grams, milligrams and other units.
QHow many grams is one Chinese jin?
In mainland China 1 jin = 500 g = 10 liang, and 1 liang = 50 g. These are the standard market units used for meat, vegetables and fruit; the converter also includes qian and dan.
QHow many pounds are in a tonne for shipping?
1 metric tonne = 1,000 kg ≈ 2,204.6 lb. For US (short) tons use 2,000 lb ≈ 907.2 kg; for UK (long) tons use 2,240 lb ≈ 1,016 kg. Confirm which ton your freight quote uses.
QHow many kg does 1 liter of water weigh?
Pure water at 4 °C weighs almost exactly 1 kg per liter (density 1 g/cm³), so 1 L = 1 kg and 500 mL = 0.5 kg. Milk, oil and other liquids differ slightly because their density is different — always check the specific density for precision work.
QHow many grams in a troy pound of gold?
1 troy pound = 12 troy ounces = 373.24 grams, whereas a standard avoirdupois pound = 453.59 grams. Gold and silver are almost always quoted per troy ounce (31.1035 g), not per avoirdupois ounce.