Weight & Mass
Weight & Mass Converter
Convert kilograms, pounds, ounces, and more
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Input
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Conversion Formula
Target = Value × (From Ratio / To Ratio)
Weight and mass conversions follow the same linear ratio principle: Target = Value × (From Ratio / To Ratio). For pounds to kilograms: multiply by 0.453592 / 1.
Weight and mass conversion is vital in fitness, cooking, shipping, and science. Convert between metric and imperial units seamlessly.
We support kilograms, grams, milligrams, pounds, ounces, stones, metric tons, US tons, and imperial tons.
All Supported Weight & Mass Units
| Unit | Symbol | Definition |
|---|---|---|
| Kilogram | kg | The SI base unit of mass, defined by the Planck constant. |
| Gram | g | One-thousandth of a kilogram, the base unit for most food measurements. |
| Milligram | mg | One-millionth of a kilogram, used in pharmaceuticals and supplements. |
| Microgram | µg | One-billionth of a kilogram, used inmicronutrients and scientific research. |
| Pound | lb | The imperial unit of mass equal to 16 ounces, used in the US and UK. |
| Ounce | oz | The imperial unit of mass equal to 1/16 of a pound. |
| Stone | st | The imperial unit of mass equal to 14 pounds, used for body weight in the UK. |
| Metric Ton | t | One thousand kilograms, used for large-scale mass measurements. |
| US Ton | US t | The US customary ton equal to 2,000 pounds, used in industry. |
| Imperial Ton | UK t | The imperial ton equal to 2,240 pounds, used in the UK. |
| Carat | ct | A unit of mass equal to 200 mg, used for gemstones and diamonds. |
Common Weight Conversions
| From | To | Value |
|---|---|---|
| 1 kg | lb | 2.205 |
| 1 kg | oz | 35.274 |
| 1 lb | kg | 0.454 |
| 1 lb | oz | 16 |
| 1 st | kg | 6.350 |
| 1 t | lb | 2,204.62 |
| 1 oz | g | 28.349 |
Frequently Asked Questions
Mass is the amount of matter in an object. Weight is the force of gravity on that mass. On Earth, they are used interchangeably for everyday purposes.
One stone equals 14 pounds. The stone is primarily used in the UK and Ireland for body weight measurements.
To convert kg to lbs, multiply the kilogram value by 2.20462. For example, 70 kg × 2.20462 = 154.32 lbs. This is the most common weight conversion query worldwide.
One ounce equals approximately 28.3495 grams. To convert ounces to grams, multiply by 28.35. This is essential for cooking and baking with international recipes.
A metric ton (tonne) = 1,000 kg or 2,204.62 lbs. A US ton (short ton) = 2,000 lbs or 907.185 kg. An imperial ton (long ton) = 2,240 lbs or 1,016 kg.
There are exactly 1,000 milligrams (mg) in 1 gram (g). This conversion is crucial in pharmaceuticals, supplements, and scientific measurements.
A carat (200 mg) is used exclusively for measuring gemstones and pearls. One carat equals 200 milligrams or 0.2 grams. The word originates from carob seeds historically used as counterweights.
Measurement Knowledge
Weight & Mass Reference Guides
Master weight & mass measurements with our comprehensive educational resources.
Popular Weight & Mass Conversions
Direct access to the most commonly used conversion tools.
kg Kilogram Conversions
lb Pound Conversions
g Gram Conversions
oz Ounce Conversions
st Stone Conversions
t Metric Ton Conversions
Supported Weight & Mass Units
Complete listing of available weight & mass units in our converter.
kg
Kilogram
metric
lb
Pound
imperial
g
Gram
metric
oz
Ounce
imperial
st
Stone
imperial
t
Metric Ton
metric
mg
Milligram
metric
ct
Carat
metric