Weight Converter

Convert kilograms, pounds, grams, ounces, tons, and stones

💡 Tip: Press Ctrl+D for dark mode, Ctrl+K to focus converter

⚖️ Weight Converter

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

💡 Memory Trick: 1 kg ≈ 2.2 lbs
1 Kilogram = 2.20462 Pounds

Weight Conversion Guide

Common Weight Conversions

From To Multiply By Example
Kilograms Pounds 2.20462 1 kg = 2.20462 lbs
Pounds Kilograms 0.453592 1 lb = 0.453592 kg
Grams Ounces 0.035274 100 g = 3.5274 oz
Ounces Grams 28.3495 1 oz = 28.3495 g
Kilograms Grams 1000 1 kg = 1000 g
Pounds Ounces 16 1 lb = 16 oz
Metric Tons Kilograms 1000 1 t = 1000 kg
Stones Kilograms 6.35029 1 st = 6.35029 kg

Understanding Weight Units

Metric System (International)

Kilogram (kg) - The base unit of mass in the metric system. Defined by the International Prototype Kilogram until 2019, now defined by fundamental constants of nature.

Gram (g) - 1/1,000 of a kilogram. Commonly used for measuring food, ingredients, and small items.

Milligram (mg) - 1/1,000 of a gram. Often used in medicine and chemistry for very small quantities.

Metric Ton (t) - 1,000 kilograms. Used for large quantities like cargo, industrial materials.

Imperial/US System

Pound (lb) - Defined as exactly 0.45359237 kilograms. The primary unit of weight in the United States.

Ounce (oz) - 1/16 of a pound, or 28.3495 grams. Commonly used for food portions and postal weights.

Stone (st) - 14 pounds or 6.35029 kilograms. Traditionally used in the UK for body weight.

Practical Examples

  • 👶 Newborn Baby: Average 3.5 kg (7.7 lbs)
  • 💼 Laptop: Typical 2 kg (4.4 lbs)
  • 🍎 Apple: About 200 g (7 oz)
  • 🐘 African Elephant: 5,000 kg (11,000 lbs or 5 metric tons)
  • 🏋️ Gym Dumbbell: 10 kg (22 lbs)
  • 📦 Package Limit (USPS): 70 lbs (31.75 kg)
  • ✈️ Luggage Limit: Typically 23 kg (50 lbs)
  • 🏈 American Football: 400-425 g (14-15 oz)

Why Convert Between Weight Units?

Weight conversion is essential in many situations:

  • 🌍 International Travel: Luggage weight limits vary by region
  • 🍳 Cooking & Baking: Recipes from different countries use different units
  • 💊 Medicine: Dosages may be prescribed in different units
  • 🏃 Fitness: Tracking body weight in preferred units
  • 📦 Shipping: Calculating postal and freight costs
  • 🛒 Shopping: Comparing product weights internationally
  • ⚖️ Science: Lab work requires precise conversions

Quick Mental Math Tips

Kilograms to Pounds (approximate):

  • Multiply kg by 2, then add 10% → Example: 10 kg × 2 = 20, plus 10% (2) = 22 lbs ✓
  • More precise: multiply by 2.2

Pounds to Kilograms (approximate):

  • Divide lbs by 2, then subtract 10% → Example: 20 lbs ÷ 2 = 10, minus 10% (1) = 9 kg ✓
  • More precise: divide by 2.2 or multiply by 0.45

Grams to Ounces:

  • Divide grams by 28 → Example: 280 g ÷ 28 ≈ 10 oz

Frequently Asked Questions

How do I convert kilograms to pounds?

To convert kilograms to pounds, multiply the kilogram value by 2.20462. For example, 75 kg × 2.20462 = 165.35 lbs. Our calculator does this automatically for perfect accuracy.

How many pounds are in a kilogram?

There are exactly 2.20462 pounds in one kilogram. This is based on the international definition where 1 pound = 0.45359237 kilograms.

How do I convert grams to ounces?

Divide grams by 28.3495 to get ounces. For example, 100 grams ÷ 28.3495 = 3.527 ounces. Or multiply grams by 0.035274.

What's the difference between mass and weight?

Mass is the amount of matter in an object (measured in kg, g, etc.) and stays constant. Weight is the force of gravity on that mass and varies by location. In everyday use, the terms are often used interchangeably.

How accurate is this weight converter?

Our converter uses exact conversion factors defined by international standards (NIST, BIPM). Results are accurate up to 10 decimal places, exceeding most practical needs.

Why are there different ounces (oz vs fl oz)?

Ounces (oz) measure weight/mass, while fluid ounces (fl oz) measure volume. Don't confuse them - 1 oz of water does NOT equal 1 fl oz by weight (though they're close for water).

Quick Reference Chart

Kilograms to Common Units:

  • 1 kilogram = 1,000 grams
  • 1 kilogram = 1,000,000 milligrams
  • 1 kilogram = 2.20462 pounds
  • 1 kilogram = 35.274 ounces
  • 1 kilogram = 0.157473 stones
  • 1,000 kilograms = 1 metric ton

Pounds to Common Units:

  • 1 pound = 16 ounces
  • 1 pound = 453.592 grams
  • 1 pound = 0.453592 kilograms
  • 14 pounds = 1 stone
  • 2,000 pounds = 1 US ton (short ton)

Common Body Weights:

  • 50 kg = 110 lbs = 7.9 stones
  • 60 kg = 132 lbs = 9.4 stones
  • 70 kg = 154 lbs = 11 stones
  • 80 kg = 176 lbs = 12.6 stones
  • 90 kg = 198 lbs = 14.2 stones
  • 100 kg = 220 lbs = 15.7 stones