How many pounds are in a kilogram?

One kilogram equals approximately 2.20462 pounds.

What is a stone in weight?

A stone is a unit of weight used in the UK, equal to 14 pounds (about 6.35 kg).

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

A metric ton is 1,000 kg (2,204.6 lbs). A US short ton is 2,000 lbs (907 kg). A UK long ton is 2,240 lbs (1,016 kg).

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Conversion Results

1.00 Kilogram

Milligram	1,000,000.00
Gram	1,000.00
Kilogram	1.00
Metric Ton	1.0000e-3
Ounce	35.273991
Pound	2.204624
Stone	0.157473
Short Ton (US)	1.1023e-3
Long Ton (UK)	9.8421e-4

Weight Converter: Convert Between All Weight & Mass Units

Our Weight Converter provides instant, accurate conversions between all common weight and mass units. From milligrams to metric tons, pounds to kilograms, and ounces to grams, this tool handles every conversion you'll ever need.

Weight measurement has a rich history spanning thousands of years, from ancient Babylonian coins to the modern International System of Units. Different civilizations developed their own standards, leading to the diverse array of units still in use today.

Whether you're comparing product weights for international shipping, following a recipe from abroad, or studying physics, this converter ensures you always have the right numbers at your fingertips.

Understanding Weight Measurement Systems

The Metric System, developed during the French Revolution, uses the kilogram as its base unit. It's used worldwide for science and commerce, and its decimal structure makes conversions straightforward.

The Imperial/US Customary System uses pounds and ounces. The pound is defined as exactly 0.45359237 kilograms. This system remains prevalent in the United States and, to some extent, the United Kingdom.

The Troy System is used specifically for precious metals. A troy ounce (31.1 g) is heavier than a standard avoirdupois ounce (28.35 g), which is important when trading gold, silver, or platinum.

How to Use the Weight Converter

Step 1: Enter Value: Type the weight you want to convert.
Step 2: Select From Unit: Choose the unit you're converting from (e.g., pounds).
Step 3: Select To Unit: Choose your desired target unit (e.g., kilograms).
Step 4: View Result: The conversion is calculated instantly with full precision.
Step 5: View All Units: See the equivalent value in every supported unit simultaneously.

Key Conversion Factors

Metric Conversions

1 kg = 1,000 g = 1,000,000 mg | 1 metric ton = 1,000 kg

Metric conversions are always powers of 10, making mental math easy.

Cross-System

1 lb = 0.45359237 kg | 1 oz = 28.3495 g | 1 stone = 14 lb = 6.35029 kg

These factors are internationally standardized since 1959.

Tons

Short Ton (US) = 2,000 lb | Long Ton (UK) = 2,240 lb | Metric Ton = 2,204.6 lb

Be careful — there are three different 'tons' in common use!

Common Weight Comparisons

Object	Metric	Imperial
US Nickel Coin	5 grams	0.176 oz
Can of Soda	355 grams	12.5 oz
Average Adult	70 kg	154 lbs
Compact Car	1,200 kg	2,646 lbs

Benefits of Our Weight Converter

✓
All Units in One Place
Milligrams, grams, kilograms, ounces, pounds, stones, short tons, metric tons, and long tons.
✓
Full Conversion Table
View your value converted to every unit simultaneously for easy comparison.
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Swap Feature
Instantly reverse conversions with the swap button.
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Free and Fast
No downloads required — works instantly in your browser on any device.

Frequently Asked Questions

What's the difference between mass and weight?

Mass is the amount of matter (constant everywhere). Weight is the gravitational force on that mass (varies by location). On Earth's surface, they are proportional.

How many ounces in a pound?

There are exactly 16 ounces in one avoirdupois pound.

What is a grain?

A grain is one of the oldest units of weight, originally based on a single grain of barley. 1 grain = 0.0648 grams. It's still used in ammunition and pharmaceuticals.

Why does the UK use stones for body weight?

The stone has been used in the British Isles since the Middle Ages. 1 stone = 14 pounds. It persists as a cultural preference despite the metric system.