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weight Converter

Convert between different units of mass measurement like kilograms, pounds, and ounces.

Free Weight Converter - Kilograms, Pounds, Ounces

Convert weight and mass units instantly with our free online weight converter. Whether you need to convert kilograms to pounds, pounds to ounces, or work with grams, stones, and tons, our calculator provides accurate results for cooking, fitness, shipping, and scientific applications.

Weight conversion is essential for international shipping, cooking recipes, fitness tracking, and scientific measurements. Our tool supports all common weight units including metric (kg, g, mg) and imperial (lb, oz, st) systems for global compatibility.

Understanding Weight Units

Common Weight Measurements:

  • Kilogram (kg): The SI base unit of mass. Used globally for scientific and everyday measurements. 1 kg = 1000 grams.
  • Gram (g): Smaller metric unit for lightweight items. Common in cooking and laboratory measurements.
  • Pound (lb): Imperial unit used primarily in the US. 1 pound = 16 ounces = 453.592 grams.
  • Ounce (oz): Smaller imperial unit for precise measurements. Used in cooking, precious metals, and small items.
  • Stone (st): British imperial unit. 1 stone = 14 pounds. Still used for body weight in the UK.
  • Ton: Large unit with variations - metric ton (1000 kg), US ton (2000 lb), UK ton (2240 lb).
Weight Conversion Formulas

Essential Weight Conversions:

  • Kilograms to Pounds: lb = kg × 2.20462
  • Pounds to Kilograms: kg = lb ÷ 2.20462
  • Grams to Ounces: oz = g × 0.035274
  • Ounces to Grams: g = oz × 28.3495
  • Pounds to Ounces: oz = lb × 16
  • Stones to Pounds: lb = st × 14

Step-by-Step Conversion Examples:

Convert 70 kg to pounds:

lb = 70 × 2.20462 = 154.32 lb

Convert 150 lb to kilograms:

kg = 150 ÷ 2.20462 = 68.04 kg

Convert 500 g to ounces:

oz = 500 × 0.035274 = 17.64 oz

Weight Conversion Applications

Common Uses for Weight Conversion:

  • Cooking & Recipes: Converting ingredient weights between metric and imperial units for international recipes and precise baking.
  • Fitness & Health: Converting body weight between kg and lb for international fitness programs and medical records.
  • Shipping & Logistics: Converting package weights for international shipping rates and customs declarations.
  • Science & Laboratory: Converting precise measurements for research, chemistry, and pharmaceutical applications.
  • Manufacturing: Converting material weights for international production specifications and quality control.
  • Precious Metals: Converting weights of gold, silver, and jewelry between different measurement systems.
  • Agriculture: Converting crop yields, livestock weights, and feed quantities for international trade.
Weight Conversion FAQ