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From: Kilograms (kg)
To: Pounds (lb)
Weight units are measurements used to quantify the mass of objects. Different systems are used worldwide, with the metric system (kilograms) and imperial system (pounds) being the most common.
The kilogram is the SI base unit for mass. Originally defined by a platinum-iridium artifact kept at the International Bureau of Weights and Measures, it's now defined based on fixed numerical values of the Planck constant.
Body weight, food quantities, industrial measurements
The metric system uses standard prefixes to create multiples and submultiples of the base unit:
| Prefix | Symbol | Factor |
|---|---|---|
| Kilo- | k | 10³ (1000) |
| Hecto- | h | 10² (100) |
| Deca- | da | 10¹ (10) |
| Deci- | d | 10⁻¹ (0.1) |
| Centi- | c | 10⁻² (0.01) |
| Milli- | m | 10⁻³ (0.001) |
| Ounce (oz) | 1/16 of a pound |
| Pound (lb) | Base imperial weight unit |
| Stone (st) | 14 pounds = 1 stone |
| US Ton (ton) | 2,000 pounds = 1 ton |
| Long Ton (lt) | 2,240 pounds = 1 long ton |
The imperial system is primarily used in the United States and partially in the UK. It has historical origins and is based on traditional measurements with somewhat irregular conversion factors.
= 28.35 g
= 453.59 g
= 6.35 kg
= 907.18 kg
1 troy ounce = 31.1035 grams
Used for precious metals like gold, silver, and platinum. Heavier than a standard (avoirdupois) ounce.
1 grain = 64.79891 milligrams
Used for measuring gunpowder, bullets, and some pharmaceuticals.
1 tael ≈ 37.5 grams (varies by region)
Used in East Asian countries, particularly for gold and jewelry.
1 catty ≈ 600 grams (varies by region)
Traditional Chinese unit still commonly used in markets.
Used in chemistry and physics
1 amu = 1.66053886 × 10^-27 kg
International unit for large masses
1 metric ton = 1,000 kg
• 1 kg ≈ 2.2 pounds (multiply by 2.2)
• 1 gram ≈ 0.035 ounces (multiply by 0.035)
• 1 metric ton = 1.1 US tons (multiply by 1.1)
• 1 pound ≈ 0.45 kg (multiply by 0.45)
• 1 ounce ≈ 28.35 grams (multiply by 28.35)
• 1 stone ≈ 6.35 kg (multiply by 6.35)
Speed up your conversions with these keyboard shortcuts:
Tab: Navigate between input fields
Alt + Arrow Down: Open unit dropdown
Ctrl + Alt + S: Swap units
The converter maintains high precision for calculations, but displays results in a readable format. For scientific and engineering applications requiring exact precision, consider:
• For very large or small numbers, results are displayed in scientific notation
• Calculations maintain at least 10 significant digits of precision
• Some conversions (like metric to imperial) may involve slight rounding differences
| If you have | Equivalent to |
|---|---|
| 1 kilogram | 1000 g = 2.20462 lb = 35.274 oz |
| 1 pound | 16 oz = 453.592 g = 0.453592 kg |
| 1 ounce | 28.3495 g = 0.0283495 kg |
| 1 stone | 14 lb = 6.35029 kg = 6350.29 g |
| 1 metric ton | 1000 kg = 2204.62 lb = 1.10231 US tons |
| 1 US ton | 2000 lb = 907.185 kg = 0.907185 metric tons |