Convert between kilograms, pounds, ounces, grams and other weight units with our free online tool.
Visual representation of the input weight compared to common objects
Weight is the force exerted on an object due to gravity, while mass is the amount of matter in an object. In everyday use, we often use these terms interchangeably.
Scientific Note: The kilogram is the SI base unit of mass, defined by taking the fixed numerical value of the Planck constant.
Kilogram (kg): SI base unit used worldwide.
Gram (g): 0.001 kg, used for small objects.
Pound (lb): Imperial unit equal to 0.45359237 kg.
Ounce (oz): 1/16 pound, used for food and small items.
Troy Ounce (oz t): Used for precious metals like gold and silver.
Carat (ct): Used for gemstones, equal to 0.2 grams.
Grain (gr): Used in ammunition and pharmacology.
Newton (N): Force unit often used for weight measurements.
Catty (斤): Traditional Asian unit ≈ 0.5 kg.
Tael (两): Traditional Chinese unit ≈ 37.5 g.
Accuracy Note: This converter uses precise conversion factors. For critical applications, always verify calculations with authoritative sources.
The metric system is an internationally recognized decimal system of measurement used in most countries.
| From | To | Formula |
|---|---|---|
| kg | lb | lb = kg × 2.20462 |
| lb | kg | kg = lb / 2.20462 |
| kg | oz | oz = kg × 35.274 |
| oz | kg | kg = oz / 35.274 |
| kg | g | g = kg × 1000 |
| g | kg | kg = g / 1000 |
| kg | t | t = kg / 1000 |
| t | kg | kg = t × 1000 |
| Unit | Symbol | Equivalent in grams | Common usage |
|---|---|---|---|
| Metric Ton | t | 1,000,000 | Industrial, shipping |
| Kilogram | kg | 1000 | Standard metric |
| Gram | g | 1 | Base unit |
| Milligram | mg | 0.001 | Medical doses |
| Microgram | mcg | 0.000001 | Precise medication, vitamins |
| Carat (metric) | ct | 0.2 | Gemstones, diamonds |
| Grain | gr | 0.06479891 | Ammunition, archery, pharmacy |
| Pennyweight | dwt | 1.55517384 | Precious metals |
| Troy Ounce | oz t | 31.1034768 | Gold, silver, precious metals |
| Troy Pound | lb t | 373.2417216 | Bullion (less common) |
| Avoirdupois Ounce | oz | 28.349523125 | Cooking, postal |
| Avoirdupois Pound | lb | 453.59237 | US/UK weight |
| Stone | st | 6350.29318 | Body weight (UK) |
| US Hundredweight (short) | cwt (US) | 45,359.237 | Agriculture, commodities |
| UK Hundredweight (long) | cwt (UK) | 50,802.34544 | Traditional UK |
| US Ton (short) | sh tn | 907,184.74 | USA |
| Imperial Ton (long) | long tn | 1,016,046.9088 | UK |
| Slug | slug | 14,593.90294 | Physics/engineering |