🔄 Converters
⚖️ ⚖️ Weight Converter: Kilograms, Pounds, Ounces and Tons
Learn how to convert between kilograms, pounds, ounces, grams, and tons. Covers exact formulas, the three types of "ton," troy weight for precious metals, and key reference weights.
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Weight conversion is needed for recipes, luggage allowances, shipping rates, bodyweight in health contexts, and precious metals. The fundamental anchor: 1 kilogram = 2.20462 pounds (1 pound = 453.592 grams exactly since 2019).
Common Conversion Formulas
| Convert |
Formula |
Example |
| kg → lbs | × 2.20462 | 70 kg = 154.3 lbs |
| lbs → kg | ÷ 2.20462 | 150 lbs = 68.04 kg |
| lbs → oz | × 16 | 5 lbs = 80 oz |
| oz → g | × 28.3495 | 8 oz = 226.8 g |
| g → oz | ÷ 28.3495 | 100 g = 3.53 oz |
| kg → g | × 1,000 | 2.5 kg = 2,500 g |
The Three "Ton" Units
- Metric ton (tonne): 1,000 kg = 2,204.6 lbs — international standard
- Short ton (US): 2,000 lbs = 907.2 kg — US standard for bulk goods
- Long ton (UK): 2,240 lbs = 1,016 kg
Metric ton and short ton differ by ~10%. Confusing them in commercial contexts is a significant error.
Troy Weight for Precious Metals
- 1 troy ounce = 31.1035 g (vs 28.3495 g for regular/avoirdupois ounce)
- Troy ounces are ~10% heavier than regular ounces
- Gold, silver, platinum are always quoted in troy ounces
Quick Mental Approximations
- 1 kg ≈ 2.2 lbs
- 1 lb ≈ 450 g
- 100 g ≈ 3.5 oz
❓ Frequently Asked Questions
How do I convert kilograms to pounds?▼
Multiply kg by 2.20462. Quick approximation: × 2.2. Examples: 50 kg = 110 lbs, 70 kg = 154 lbs, 100 kg = 220 lbs. For lbs to kg: divide by 2.20462 or multiply by 0.45359.
What is the difference between metric ton and US ton?▼
Metric ton = 1,000 kg = 2,204.6 lbs. US short ton = 2,000 lbs = 907.2 kg. They differ by about 10%. Always clarify which ton is being used in commercial or shipping contexts.
What is a troy ounce?▼
1 troy ounce = 31.1035 g versus 28.3495 g for a regular ounce — about 10% heavier. Precious metals (gold, silver, platinum) are always measured in troy ounces. When you see "gold at $2,000/oz," that means per troy ounce.
How do I convert pounds to kilograms?▼
Divide by 2.20462 or multiply by 0.45359. Examples: 100 lbs = 45.36 kg, 150 lbs = 68.04 kg, 200 lbs = 90.72 kg. Quick approximation: divide by 2.2.
How many grams are in a pound?▼
Exactly 453.592 grams per pound (exact defined value since 2019). One ounce = 28.3495 g (since 16 oz = 1 lb: 453.592 ÷ 16 = 28.3495).