Weight Conversion

Convert between kilograms, grams, pounds, ounces, and more

Weight Conversion

Common Weight Conversion Formulas

  • 1 kilogram = 1000 grams
  • 1 pound β‰ˆ 0.4536 kilograms
  • 1 pound = 16 ounces
  • 1 ton = 1000 kilograms
  • 1 ounce β‰ˆ 28.35 grams

Common Weight Conversion References

  • A4 Paper Weight: 5g
  • Average Apple Weight: 150g
  • Average Adult Weight: 70kg
  • Standard Container Max Load: 26 tons

What is Weight Conversion?

Weight conversion allows you to convert measurements between different units of mass and weight. Understanding weight conversions is crucial for cooking, shipping, fitness tracking, scientific research, and international commerce. The metric system uses kilograms and grams, while the imperial system uses pounds and ounces. Our weight converter handles all common weight units with precision, making it easy to convert recipes, track fitness goals, or calculate shipping costs across different measurement systems.

Common Weight Units Explained

Kilogram (kg)

The base unit of mass in the SI system. Defined by the International Prototype of the Kilogram. One kilogram equals approximately 2.205 pounds. Used worldwide for body weight, food quantities, and general measurements.

Gram (g)

Equal to 1/1000 of a kilogram. Commonly used for measuring food ingredients, medications, and small objects. One gram is roughly the weight of a paperclip.

Pound (lb)

An imperial unit equal to approximately 0.4536 kilograms. Widely used in the US and UK for body weight, food, and everyday measurements. One pound equals 16 ounces.

Ounce (oz)

Equal to 1/16 of a pound or approximately 28.35 grams. Used for food portions, precious metals, and postal weights. Not to be confused with fluid ounces (volume).

Metric Ton (t)

Equal to 1,000 kilograms. Used for measuring large quantities in shipping, agriculture, and industry. Also known as a tonne.

Stone (st)

A traditional British unit equal to 14 pounds or approximately 6.35 kilograms. Still commonly used in the UK and Ireland for body weight.

When to Use This Converter

Our weight converter is essential for home cooks adapting international recipes, fitness enthusiasts tracking weight in different units, travelers checking luggage weight limits, online shoppers understanding product weights, healthcare professionals converting patient weights, shipping companies calculating postage, and scientists working with precise measurements. Whether you are converting pounds to kilograms for a gym workout or grams to ounces for a recipe, our tool delivers instant, accurate results.

Frequently Asked Questions

What is the difference between weight and mass?

Mass is the amount of matter in an object (measured in kilograms), while weight is the force of gravity on that mass. On Earth, they are proportional, so we often use them interchangeably. Our converter works for both purposes.

How do I quickly convert between pounds and kilograms?

A quick approximation: 1 kg β‰ˆ 2.2 lbs, or 1 lb β‰ˆ 0.45 kg. For example, 150 lbs β‰ˆ 68 kg. Use our converter for precise values.

Why do some countries use different weight units?

The metric system was developed in France during the 1790s and adopted internationally. The US and UK retained imperial units from British tradition. Most scientific work uses metric units worldwide.