Convert between kilograms, pounds, ounces, grams, and more weight units.
Convert between metric (g, kg, tonnes) and imperial (oz, lbs, stones) systems.
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Calculations use precise conversion factors for accurate results.
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Weight conversion is essential in our globally connected world. Recipes from different countries use different units, international shipping requires metric conversions, and travelers need to understand local measurement systems.
In science, medicine, and industry, precise weight conversions are critical. Medication dosages, chemical formulations, and manufacturing specifications all depend on accurate unit conversion.
A fluid ounce measures volume, not weight. 1 fl oz of water weighs about 1.043 oz, but other liquids differ.
A metric ton is 1,000 kg, a US short ton is 907 kg, and a UK long ton is 1,016 kg. Specify which ton you mean.
Rounding intermediate calculations introduces compounding errors. Use full precision until the final result.
Gold and precious metals use troy ounces (31.1g), while everyday items use avoirdupois ounces (28.35g).
One kilogram equals approximately 2.20462 pounds. To convert kg to lbs, multiply by 2.20462. To convert lbs to kg, divide by 2.20462 or multiply by 0.453592.
One ounce equals approximately 28.3495 grams. This is the avoirdupois ounce used for everyday items. The troy ounce (used for precious metals) equals 31.1035 grams.
One stone equals 14 pounds or approximately 6.35 kg. It is commonly used in the UK and Ireland for body weight. For example, 150 lbs = 10 stone 10 lbs.
One metric ton (tonne) equals 1,000 kg or approximately 2,204.62 pounds. One US short ton equals 2,000 pounds.
Mass is the amount of matter in an object (measured in kg), while weight is the force of gravity on that mass (measured in newtons). On Earth, they are proportionally equivalent for practical purposes.