Weight Converter

Enter a value to instantly convert between weight units.

Weight (technically mass) conversions come up constantly in everyday life — reading a luggage allowance in kilograms when you're used to pounds, following a recipe that lists ingredients in grams, or checking a package's shipping weight in ounces. Because the US uses pounds and ounces as its everyday units while most of the world uses the metric kilogram and gram, weight is one of the conversion categories people reach for most often, especially around travel, cooking, and shipping.

From

Precision4 dp

1 Kilogram = 2.2046 Pound

Key Formulas

Kilogram → Pound

lb = kg × 2.20462

Pound → Kilogram

kg = lb × 0.453592

Gram → Ounce

oz = g × 0.035274

Ounce → Gram

g = oz × 28.3495

Popular Conversions

Kilogram to Gram Kilogram to Pound Gram to Ounce Pound to Kilogram Ounce to Gram Stone to Kilogram

All Weight Conversions

Kilogram to Gram Kilogram to Pound Gram to Ounce Pound to Kilogram Ounce to Gram Stone to Kilogram Kilogram to Milligram Kilogram to Metric Ton Kilogram to Ounce Kilogram to Stone Kilogram to Short Ton (US) Kilogram to Long Ton (UK) Kilogram to Microgram Kilogram to Carat Gram to Kilogram Gram to Milligram Gram to Metric Ton Gram to Pound Gram to Stone Gram to Short Ton (US) Gram to Long Ton (UK) Gram to Microgram Gram to Carat Milligram to Kilogram Milligram to Gram Milligram to Metric Ton Milligram to Pound Milligram to Ounce Milligram to Stone Milligram to Short Ton (US) Milligram to Long Ton (UK) Milligram to Microgram Milligram to Carat Metric Ton to Kilogram Metric Ton to Gram Metric Ton to Milligram Metric Ton to Pound Metric Ton to Ounce Metric Ton to Stone Metric Ton to Short Ton (US) Metric Ton to Long Ton (UK) Metric Ton to Microgram Metric Ton to Carat Pound to Gram Pound to Milligram Pound to Metric Ton Pound to Ounce Pound to Stone Pound to Short Ton (US) Pound to Long Ton (UK) Pound to Microgram Pound to Carat Ounce to Kilogram Ounce to Milligram Ounce to Metric Ton Ounce to Pound Ounce to Stone Ounce to Short Ton (US) Ounce to Long Ton (UK) Ounce to Microgram Ounce to Carat Stone to Gram Stone to Milligram Stone to Metric Ton Stone to Pound Stone to Ounce Stone to Short Ton (US) Stone to Long Ton (UK) Stone to Microgram Stone to Carat Short Ton (US) to Kilogram Short Ton (US) to Gram Short Ton (US) to Milligram Short Ton (US) to Metric Ton Short Ton (US) to Pound Short Ton (US) to Ounce Short Ton (US) to Stone Short Ton (US) to Long Ton (UK) Short Ton (US) to Microgram Short Ton (US) to Carat Long Ton (UK) to Kilogram Long Ton (UK) to Gram Long Ton (UK) to Milligram Long Ton (UK) to Metric Ton Long Ton (UK) to Pound Long Ton (UK) to Ounce Long Ton (UK) to Stone Long Ton (UK) to Short Ton (US) Long Ton (UK) to Microgram Long Ton (UK) to Carat Microgram to Kilogram Microgram to Gram Microgram to Milligram Microgram to Metric Ton Microgram to Pound Microgram to Ounce Microgram to Stone Microgram to Short Ton (US) Microgram to Long Ton (UK) Microgram to Carat Carat to Kilogram Carat to Gram Carat to Milligram Carat to Metric Ton Carat to Pound Carat to Ounce Carat to Stone Carat to Short Ton (US) Carat to Long Ton (UK) Carat to Microgram

About Weight Conversions

History & Background

The kilogram is the only base SI unit still defined by reference to a physical object's name in everyday language (though its formal definition was redefined in 2019 in terms of fundamental physical constants rather than a physical artifact). The pound has a much older and more tangled history, descending from Roman units through medieval English trade standards, with multiple competing definitions (the avoirdupois pound used for general weight, and the troy pound used for precious metals) existing well into the modern era. The avoirdupois pound — defined as exactly 453.59237 grams since an international agreement in 1959 — is the pound used in nearly all everyday contexts today, including the conversions on this site.

How to Use This Converter

Select your starting unit and target unit, enter the value, and the conversion updates in real time. For body weight, cooking, and shipping, the default precision is more than sufficient — but if you're working with very small masses (jewelry, lab samples), check the unit list for grains, carats, or micrograms, which are tagged for more specialist use.

Frequently Asked Questions

Is weight the same as mass?

In everyday conversions, yes — kilograms, pounds, and grams are all used informally as units of mass, and that's how this site treats them. Technically, 'weight' is the force of gravity on a mass (measured in newtons), while 'mass' is an intrinsic property measured in kilograms — but unless you're doing physics calculations involving different gravitational fields, the everyday usage (treating kg and lbs as mass units) is correct and standard.

Why do US recipes use cups and ounces while UK/European recipes use grams?

This is partly historical and partly practical: US kitchens traditionally measure by volume (cups, tablespoons) which is faster but less precise for dry ingredients, while metric countries' baking traditions favor weighing ingredients on a scale, which is more accurate because ingredient density varies. Converting between the two often requires both a unit conversion and an understanding of ingredient density — see our cooking measurement guides for details.

What's the difference between a US ton, a UK (long) ton, and a metric tonne?

A US (short) ton is 2,000 pounds (≈907 kg), a UK (long) ton is 2,240 pounds (≈1,016 kg), and a metric tonne is exactly 1,000 kg (≈2,205 lbs). All three are called 'ton(ne)' colloquially but represent meaningfully different masses — always check which definition applies when a large weight figure matters.

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