Convert between grams, kilograms, pounds, ounces, stones, milligrams, metric tons, carats, and more. Free online weight converter for cooking, fitness, shipping, science, and jewelry — instant results with a full unit breakdown.
Choose any two units from the lists below.
Enter one value and see the equivalent in all supported weight units simultaneously.
Enter values (one per line), pick source and target units, and convert the whole list.
Tap a row to load that conversion in the main calculator.
| From | To | Example | Use case |
|---|
See how everyday metric and US/UK weights relate side by side.
| Metric | Imperial / US | Grams (base) |
|---|
All conversions use grams as the base unit (NIST avoirdupois values unless noted).
| Unit | Symbol | Grams | Category |
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A weight converter changes a mass value from one measurement unit to another using a fixed conversion ratio. This tool supports metric units (milligrams, grams, kilograms, tonnes) and imperial / US customary units (ounces, pounds, stones), plus carats for gems and troy ounces for precious metals.
Enter any amount, pick your units, and get an instant result. The All Units tab shows every equivalent at once — handy when you need grams, pounds, and ounces from a single kitchen or shipping measurement.
| Unit | Symbol | Common use |
|---|---|---|
| Milligram | mg | Medicine, nutrition labels |
| Gram | g | Cooking, science (SI base for mass) |
| Kilogram | kg | Body weight, groceries (worldwide) |
| Metric ton | t | Freight, industrial loads |
| Ounce | oz | US food packaging, small parcels |
| Pound | lb | US/UK body weight, shipping |
| Stone | st | UK/Ireland body weight (1 st = 14 lb) |
| Carat | ct | Gemstones (1 ct = 0.2 g) |
| Troy ounce | ozt | Gold, silver bullion |
| Quintal | q | Agriculture (100 kg) |
In everyday language people say “weight,” but scales often measure mass. This calculator is for mass units only — not fluid ounces (fl oz), which measure liquid volume.
Multiply kilograms by 2.20462, or use this tool: select Kilogram → Pound, enter your value, and read the result. Example: 70 kg ≈ 154.32 lb.
1 pound = 453.592 grams. For conversion of pounds to grams, multiply by 453.592.
A standard avoirdupois ounce (food, shipping) is 28.3495 g. A troy ounce used for gold and silver is 31.1035 g — about 10% heavier.
Multiply stones by 14. Example: 10 st = 140 lb. This tool converts stone to any other unit directly.
No. 1 carat id eaual to 0.2 grams (200 mg). A 1-carat diamond weighs 0.2 g, not 1 g.
Yes. Switch between grams and ounces or pounds for recipes. For ingredient-specific cup weights, also try our dedicated grams-to-ounces or grams-to-pounds converters with kitchen presets.
Converts weight units like kilograms, pounds, and ounces.Convert weight from lb to kg, kg to stones and pounds, and stones to kg with our simple weight converter. Plus, use our height converter to switch between cm, feet, and inches. Imperial to metric height & weight calculator with charts.