Weight CalculatorA simple app allows you to convert between units of weight.Grams to KilogramsGrams to MilligramsGrams to OuncesGrams to PoundsKilograms to GramsKilograms to MilligramsKilograms to OuncesKilograms to PoundsKilograms to TonsMilligrams to GramsMilligrams to KilogramsMilligrams to MicrogramsMicrograms to MilligramsOunces to GramsOunces to KilogramsOunces to PoundsPounds to GramsPounds to KilogramsPounds to OuncesPounds to StonesPounds to TonsStones to PoundsTons to KilogramsTons to PoundsIn modern scientific usage, weight and mass are fundamentally different quantities: mass is an "extrinsic" (extensive) property of matter, whereas weight is a force that results from the action of gravity on matter: it measures how strongly the force of gravity pulls on that matter. However, in most practical everyday situations the word "weight" is used when, strictly, "mass" is meant.The distinction between mass and weight is unimportant for many practical purposes because the strength of gravity does not vary too much on the surface of the Earth. In a uniform gravitational field, the gravitational force exerted on an object (its weight) is directly proportional to its mass. For example, object A weighs 10 times as much as object B, so therefore the mass of object A is 10 times greater than that of object B. This means that an objects mass can be measured indirectly by its weight, and so, for everyday purposes, weighing (using a weighing scale) is an entirely acceptable way of measuring mass. Similarly, a balance measures mass indirectly by comparing the weight of the measured item to that of an object(s) of known mass. Since the measured item and the comparison mass are in virtually the same location, so experiencing the same gravitational field, the effect of varying gravity does not affect the comparison or the resulting measurement.