How many kilograms are in a pound?

1 pound equals 0.453592 kilograms. To convert pounds to kg, multiply the pound value by 0.453592. For example, 10 pounds = 10 × 0.453592 = 4.53592 kg.

How do I convert ounces to grams?

To convert ounces to grams, multiply the ounce value by 28.3495. For example, 8 ounces = 8 × 28.3495 = 226.796 grams. This is because 1 ounce equals 28.3495 grams.

What is a stone in weight measurement?

A stone is a unit of weight equal to 14 pounds or 6.35029 kilograms. It's commonly used in the UK and Ireland for measuring body weight.

Is this weight converter accurate for scientific use?

Yes, our converter uses precise conversion factors and supports up to 10 decimal places. It's suitable for scientific, medical, and commercial applications where accuracy is important.

What's the difference between mass and weight?

Mass is the amount of matter in an object (measured in kg), while weight is the force of gravity on that mass (measured in Newtons). In everyday use, the terms are often used interchangeably.

Weight Converter

Convert between pounds, kilograms, ounces, grams and more with instant results and high precision. Perfect for cooking, shipping, fitness tracking and scientific applications.

Weight Conversion Calculator

Convert between metric and imperial weight units with high precision

From

Decimal Places: 6

Popular Weight Conversions

Click any conversion to set it up instantly

Professional Applications

Weight conversion uses across different industries

👨‍🍳

Cooking & Baking

• Use grams for baking precision
• Ounces for US recipes
• 1 cup flour ≈ 125g

💊

Medical & Pharmaceutical

• Medications often in mg
• Precise dosage critical
• Body weight affects dosing

💎

Jewelry & Precious Metals

• 1 carat = 200mg
• Gold/silver in troy oz
• Diamond weight in carats

📦

Shipping & Logistics

• International: kg
• US domestic: lbs
• Check weight limits

💪

Fitness & Health

• Body weight tracking
• Protein per kg body weight
• Equipment weight

🔬

Laboratory & Research

• High precision needed
• Use metric units
• Document procedures

Key Features

Instant conversion between metric and imperial weight units

High precision calculations with adjustable decimal places (0-10)

Supports all major units: kg, lbs, oz, stones, tons

Perfect for cooking, shipping, fitness, and scientific use

Understanding Weight

Metric System: Based on kilograms (kg) and grams (g). 1 kg = 1,000 g, widely used globally

Imperial System: Uses pounds (lbs) and ounces (oz). 1 lb = 16 oz, common in US and UK

Stone (st): British unit equal to 14 pounds, traditionally used for body weight in UK/Ireland

Tons: Metric ton (1,000 kg), US ton (2,000 lbs), Imperial ton (2,240 lbs) - used for heavy objects

Tips & Strategies

Quick Mental Math: 1 kg ≈ 2.2 lbs, 1 lb ≈ 450g, 1 oz ≈ 28g for rough estimates

Cooking Conversions: Use grams for baking precision, ounces for US recipes, ml to grams: 1:1 for water

Shipping Guidelines: Use kg for international shipping, lbs for domestic US, check weight limits carefully

Body Weight Tracking: Use consistent units - kg internationally, lbs in US, stones in UK traditionally

Precision Settings: Use 0-1 decimals for daily use, 2-3 for cooking, 4+ for scientific measurements

Common Mistakes: Don't confuse US tons (2,000 lbs) with metric tons (1,000 kg) in calculations

Scientific Use: Always use metric units (g, kg) for lab work and scientific documentation

Weight Reference Guide

Common weight comparisons to help you visualize measurements

1 gram

1 paperclip
1 raisin
1 dollar bill

10 grams

2 nickels
1 AAA battery
1 stick of gum

100 grams

1 smartphone
4 oz (small apple)
1 deck of cards

1 kilogram

1 liter of water
2.2 pounds
6 bananas

1 pound

454 grams
16 ounces
1 loaf of bread

1 stone

14 pounds
6.35 kg
Small dog weight

1 metric ton

1000 kg
2204 lbs
Small car weight

Professional Weight Conversion Guide

Comprehensive answers for professional and everyday use

Basic Weight Conversions

How do I convert pounds to kilograms quickly?

Divide pounds by 2.2 or multiply by 0.453592 for precision. Example: 150 lbs ÷ 2.2 = 68.2 kg. For exact calculations, use 1 lb = 0.453592 kg.

What's the difference between metric and imperial tons?

Metric ton = 1,000 kg (2,204 lbs), US ton = 2,000 lbs (907 kg), Imperial ton = 2,240 lbs (1,016 kg). Always specify which ton when measuring heavy items.

How accurate are these conversions?

Our converter uses official conversion factors with up to 10 decimal places precision, suitable for scientific applications, jewelry, and medical dosing calculations.

When should I use stones for weight measurement?

Stones (14 lbs = 1 stone) are commonly used in UK and Ireland for body weight. Example: "12 stone 8 pounds" = 176 lbs = 79.8 kg.

Professional Applications

Which weight units are best for cooking and baking?

Use grams for baking precision (flour, sugar, butter), ounces for US recipes, and kilograms for large quantities. Digital scales showing grams provide the most accuracy for professional baking.

How do jewelry and precious metals use different weight systems?

Gemstones use carats (1 carat = 200mg), precious metals use troy ounces (31.1g), and small jewelry uses pennyweights. Always verify the correct system for accurate pricing.

What precision is needed for medical and pharmaceutical use?

Medical dosing requires high precision: milligrams for most medications, micrograms for potent drugs. Body weight in kg is used for dosage calculations (mg/kg or mcg/kg).

How do shipping and logistics handle weight conversions?

International shipping uses kilograms, US domestic uses pounds. Air freight often charges by volumetric weight. Always check carrier weight limits and dimensional weight calculations.