Weight Converter
Convert between different units of weight with precision. From grams to tons, we've got all the common weight units covered.
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The Evolution of Weight Measurement
Ancient Weight Systems
Early civilizations used natural objects as weights:
- Grain seeds: Wheat, barley as small units
- Precious metals: Gold, silver for larger weights
- Body parts: Fistfuls, handfuls as measures
- Stone weights: Carved stones for consistency
The Gram & Kilogram
Established in 1795 during French Revolution:
- Gram: Weight of 1 cubic centimeter of water
- Kilogram: 1000 grams (base unit of mass)
- Decimal system: Easy mathematical relationships
- Universal standard: Same worldwide
Avoirdupois System
Traditional British and American weight system:
- Grain: Smallest unit (about 65mg)
- Ounce: 437.5 grains (28.35g)
- Pound: 16 ounces (453.59g)
- Stone: 14 pounds (6.35kg)
Modern Precision
Today, mass is measured with extreme precision:
- Kilogram artifact: International prototype
- Atomic mass: Based on carbon-12 atoms
- Digital scales: Microgram precision
- Gravitational correction: Location affects readings
Weight Measurement in Practice
Retail & Commerce
- • Produce: grams/kilograms
- • Meat: pounds/kilograms
- • Precious metals: troy ounces
- • Postal items: grams
Pharmaceuticals
- • Medications: milligrams
- • Active ingredients: micrograms
- • Dosage calculations: precise grams
- • Quality control: exact measurements
Cooking & Baking
- • Ingredients: grams/ounces
- • Flour: cups/pounds
- • Spices: teaspoons/grams
- • Recipe scaling: proportion calculations
Science & Research
- • Chemical samples: milligrams
- • Laboratory balances: microgram precision
- • Atomic mass: atomic mass units
- • Research materials: grams/kilograms
Shipping & Logistics
- • Package weight: kilograms/pounds
- • Cargo capacity: metric tons
- • Fuel weight calculations: precise measurements
- • Weight distribution: balance requirements
Health & Fitness
- • Body weight: kilograms/pounds
- • Exercise equipment: pounds/kilograms
- • Nutritional supplements: grams
- • Medical dosages: milligrams
Common Weight Conversions
1 Kilogram =
- 1000 Grams
- 2.20 Pounds
- 35.27 Ounces
- 0.001 Metric Tons
- 6.02 × 10²³ Atomic mass units
1 Pound =
- 0.45 Kilograms
- 453.59 Grams
- 16 Ounces
- 0.07 Stone
- 7000 Grains
1 Ounce =
- 28.35 Grams
- 0.06 Pounds
- 0.03 Kilograms
- 0.00003 Metric Tons
- 437.5 Grains
1 Metric Ton =
- 1000 Kilograms
- 2204.62 Pounds
- 35273.96 Ounces
- 1.10 US Tons
- 32,150.75 Troy ounces
1 Stone =
- 6.35 Kilograms
- 14 Pounds
- 224 Ounces
- 6350.29 Grams
- 0.00635 Metric Tons
1 US Ton =
- 907.18 Kilograms
- 2000 Pounds
- 32000 Ounces
- 0.91 Metric Tons
- 29166.67 Troy ounces