Kilogram vs. Newton — What's the Difference?

The kilogram (also kilogramme) is the base unit of mass in the International System of Units (SI), the metric system, having the unit symbol kg. It is a widely used measure in science, engineering and commerce worldwide, and is often simply called a kilo in everyday speech.

The SI-derived unit of force required to accelerate a mass of one kilogram one meter per second per second, equal to 100,000 dynes. See Table at measurement.

Abbr. kg The base unit of mass in the International System, equal to 1,000 grams (2.2046 pounds). See Table at measurement.

In the International System of Units, the derived unit of force; the force required to accelerate a mass of one kilogram by one metre per second per second. Symbol: N.

Kilogram force.

English mathematician and physicist; remembered for developing the calculus and for his law of gravitation and his three laws of motion (1642-1727)

In the International System of Units, the base unit of mass; conceived of as the mass of one litre of water, but now defined by taking the fixed numerical value of the Planck constant h to be 6.626 070 15 × 10^-34 when expressed in units of kg⋅m²⋅s⁻¹. Symbol: kg

A unit of force equal to the force that imparts an acceleration of 1 m/sec/sec to a mass of 1 kilogram; equal to 100,000 dynes

(proscribed) The unit of weight such that a one-kilogram mass is also a one-kilogram weight.

A measure of weight, being a thousand grams, equal to 2.2046226 pounds avoirdupois (15,432.34 grains). It is equal to the weight of a cubic decimeter of distilled water at the temperature of maximum density, or 39° Fahrenheit.

One thousand grams; the basic unit of mass adopted under the Systeme International d'Unites;