Weight Converter: kg, lbs, oz, grams
Convert weight and mass units — kilograms, pounds, ounces, grams, tonnes, and imperial tons.
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Weight Converter: kg, lbs, oz, grams Weight conversion is needed every day: checking a recipe that lists ingredients in ounces, comparing a package weight between a US supplier and a European one, or understanding a doctor's instructions given in kilograms versus the pounds displayed on your bathroom scale. --- Mass vs Weight: The Precise Distinction In physics, mass (kg) and weight (N) are different quantities. Mass measures the amount of matter; weight measures gravitational force. This matters in engineering and aerospace — a satellite has constant mass whether orbiting Earth or Mars, but its weight varies dramatically. For everyday unit conversion purposes, the working assumption is standard gravity (g = 9.80665 m/s²), so kilograms and pound-mass are treated interchangeably. The…
Frequently Asked Questions
How do I convert kg to pounds?
Multiply kilograms by 2.20462. For example, 70 kg × 2.20462 = 154.32 pounds. The inverse: divide pounds by 2.20462, or multiply by 0.453592, to get kilograms. A rough mental check: 1 kg ≈ 2.2 lbs.
How many grams in an ounce?
One avoirdupois ounce = 28.3495 grams. One troy ounce (used for precious metals) = 31.1035 grams. The difference matters when weighing gold or silver — always confirm which type of ounce is being used.
What is the difference between mass and weight?
Mass is the amount of matter in an object (measured in kilograms); weight is the gravitational force on that mass (measured in newtons). On Earth, a 1 kg mass weighs approximately 9.81 N. Conversationally, 'weight' is used to mean mass — bathroom scales actually measure force and display mass assuming Earth's gravity.
How do I convert metric tons to short tons?
Multiply metric tons (tonnes) by 1.10231 to get short tons (US). One metric ton = 1,000 kg. One short ton = 2,000 pounds = 907.185 kg. One long ton (UK) = 2,240 pounds = 1,016.05 kg.
What is a stone in weight measurement?
A stone is a UK imperial unit equal to 14 pounds or 6.35029 kg. It is still widely used in the UK and Ireland for body weight. A person weighing 75 kg weighs approximately 11 stone 11 pounds (75 ÷ 6.35029 = 11.81 stones).
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