How many pounds in a kilogram?

1 kilogram = 2.20462 pounds. For quick mental math, multiply kilograms by 2.2 to get approximate pounds.

How many ounces in a pound?

1 pound = 16 ounces exactly. This is a fixed imperial/US customary unit relationship - divide ounces by 16 to get pounds.

What is a metric ton?

A metric ton (tonne) = 1,000 kilograms = 2,204.62 pounds. Used for measuring large weights like vehicles, cargo, and industrial materials.

How many grams in an ounce?

1 ounce = 28.3495 grams. Commonly used in cooking and precious metals. Round to 28g for quick estimation.

When should I use metric vs imperial units?

Metric (kg, g) is standard in science, medicine, and most countries. Imperial (lb, oz) is common in the US for body weight, food portions, and packages.

Why are the conversions not exact?

Conversions between metric and imperial systems involve irrational numbers. Results are rounded to 4 decimal places for practical precision while avoiding clutter.

What's the difference between weight and mass?

Mass (kg, g) is the amount of matter - constant everywhere. Weight is gravitational force on that mass. This calculator converts mass units, which we commonly call "weight".

Conversion Calculators

Weight Converter

Convert between pounds, kilograms, ounces, grams, tons, stones, and other weight and mass units instantly with high precision. Perfect for cooking, fitness tracking, shipping calculations, scientific measurements, and international weight conversions with support for metric and imperial systems.

How to Use the Weight Converter

Use the Weight Converter to between pounds, kilograms, ounces, grams, tons, stones, and other weight and mass units instantly with high precision. Perfect for cooking, fitness tracking, shipping calculations, scientific measurements, and international weight conversions with support for metric and imperial systems.. Enter your values to get accurate, instant results tailored to your situation.

Free unit conversion calculators for length, weight, temperature, volume, and more. Convert between metric and imperial units instantly.

Common Uses

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Weight Conversion Guide

Unit systems

Expert Tips

Metric vs Imperial: Metric system (kg, g): base 10 easy conversion. Imperial (lb, oz): awkward but still US standard.
Common Conversions: 1 kg = 2.2 lbs. 1 oz = 28.35g. 1 stone = 14 lbs. Memorize these for quick mental math.
Precision Matters: For medical dosing, use exact conversions. For cooking, approximations (1 kg ≈ 2 lbs) work fine.
Context Determines Unit: People: pounds (US). Science: kilograms. Cooking: grams or ounces. Packages: varies by country.

Essential Fundamentals — Weight basics

Major Units

Metric System: Gram (g) base unit. 1 kilogram = 1,000 grams. Used in science, medicine, worldwide except US/UK.
Imperial System: Pound (lb) and ounce (oz). 1 pound = 16 ounces. Used primarily in US, UK, Canada.

Conversion Basics

Key Ratios: 1 kg = 2.20462 lbs. 1 lb = 453.592 grams. 1 ounce = 28.3495 grams.
Practical Approximations: 1 kg ≈ 2.2 lbs works for cooking. 1 stone ≈ 6.35 kg for body weight.

Advanced Strategies — Application contexts

Usage Tips

Medical Dosing: Always use exact conversions. Errors in weight conversion can cause serious health consequences.
Cooking/Baking: Metric grams more precise for baking. US cups/ounces acceptable for cooking but less accurate.

Frequently Asked Questions

How many pounds in a kilogram?: 1 kilogram = 2.20462 pounds. For quick mental math, multiply kilograms by 2.2 to get approximate pounds.
How many ounces in a pound?: 1 pound = 16 ounces exactly. This is a fixed imperial/US customary unit relationship - divide ounces by 16 to get pounds.
What is a metric ton?: A metric ton (tonne) = 1,000 kilograms = 2,204.62 pounds. Used for measuring large weights like vehicles, cargo, and industrial materials.
How many grams in an ounce?: 1 ounce = 28.3495 grams. Commonly used in cooking and precious metals. Round to 28g for quick estimation.
When should I use metric vs imperial units?: Metric (kg, g) is standard in science, medicine, and most countries. Imperial (lb, oz) is common in the US for body weight, food portions, and packages.
Why are the conversions not exact?: Conversions between metric and imperial systems involve irrational numbers. Results are rounded to 4 decimal places for practical precision while avoiding clutter.
What's the difference between weight and mass?: Mass (kg, g) is the amount of matter - constant everywhere. Weight is gravitational force on that mass. This calculator converts mass units, which we commonly call "weight".