Weight Converter – for Everyday Measurements

Weight Converter: Convert Kilograms, Pounds, Grams, and More

Weight conversion shows up in more places than people expect — checking body weight on a US scale when you're used to kilograms, converting a recipe's grams to ounces, or working out shipping costs listed in pounds. A weight converter handles these instantly, without needing to remember the exact conversion factor.

This page explains how weight conversion works, covers a few common examples, and clarifies a couple of units that often cause confusion.

How Weight Conversion Works

Like length, weight conversion is a straightforward ratio — you multiply or divide by a fixed factor. For example, 1 kilogram equals 0.453592 pounds... actually, 1 pound equals 0.453592 kilograms, so converting pounds to kilograms is pounds × 0.453592. This converter supports eight units: kilogram, gram, milligram, pound, ounce, metric ton, stone, and microgram.

Enter a value, choose your "From" and "To" units, or tap one of the quick-pair shortcuts (like kg → lb), and the result updates instantly along with the exact formula used.

Common Weight Conversions

These are illustrative examples using standard international conversion factors:

• 1 kilogram ≈ 2.2046 pounds
• 1 pound = 0.453592 kilograms
• 1 ounce ≈ 28.35 grams
• 1 stone = 6.35029 kilograms
• 1 metric ton = 1,000 kilograms
• 1 kilogram = 1,000 grams

Understanding Stone, Ounces, and Metric Tons

A few weight units are less familiar outside certain regions or contexts:

• Stone is a unit still commonly used for body weight in the UK and Ireland. One stone equals 14 pounds, or about 6.35 kilograms.
• Ounce here refers to a mass unit (avoirdupois ounce), not a fluid ounce. A fluid ounce measures volume, not weight, so the two aren't directly interchangeable — this converter's ounce is strictly a weight unit.
• Metric ton (1,000 kg) is different from the US short ton (2,000 pounds, about 907.18 kg) and the UK long ton (2,240 pounds, about 1,016.05 kg). This converter uses the metric ton.

Limitations to Keep in Mind

• This tool converts the metric ton only. If you need US short tons or UK long tons specifically, confirm which definition applies to your task before using the result.
• Conversions use standard international definitions, accurate for everyday, fitness, cooking, and shipping use. Regulated contexts (medical dosing, commercial trade) may require checking the exact standard that applies.
• Calculations happen directly in your browser using JavaScript, so there's no need to send your values to a server to get a result.

Related Conversions You Might Need

• Use the Unit Converter if you need weight, length, temperature, and other categories in one place.
• Use the Length Converter for meters, feet, inches, and other distance units.
• Use the Volume Converter if you're actually converting a liquid or fluid ounce measurement rather than weight.
• Use the Data Storage Converter for MB, GB, and TB conversions.

Frequently Asked Questions

How many pounds are in a stone?

One stone equals exactly 14 pounds, or approximately 6.35 kilograms. It's most commonly used for body weight in the UK and Ireland.

Is an ounce the same as a fluid ounce?

No. An ounce measures weight (mass), while a fluid ounce measures volume. They share a name but aren't interchangeable — 1 ounce of water happens to weigh close to 1 fluid ounce by volume, but this doesn't hold for most other ingredients.

What's the difference between a metric ton and a US ton?

A metric ton equals 1,000 kilograms. A US short ton equals 2,000 pounds (about 907.18 kg), and a UK long ton equals 2,240 pounds (about 1,016.05 kg). These are three distinct units, so it matters which one your source is using.

How do I convert my body weight from kg to lbs?

Multiply the value in kilograms by 2.2046. For example, 70 kg × 2.2046 ≈ 154.3 pounds.

Why do some countries use stone instead of kilograms or pounds for body weight?

Stone is a historical unit that remained in common use for body weight in the UK and Ireland even after those countries largely adopted the metric system for other measurements. It's a matter of regional convention rather than measurement accuracy.