Difference Between Weight & Mass

1. Weight is the force with which gravity pulls on a mass.
2. Mass is the measure of the amount of matter in a body. Mass is denoted using m or M.
Weight is the measure of the amount of force acting on a mass due to the acceleration due to gravity. Weight usually is denoted by W. Weight is mass multiplied by the acceleration of gravity.
W = m * g
3. Maybe the simplest way to explain the difference is that on the Moon or on Mars, your weight is reduced because gravity is weaker there, but your mass is still the same.
4. Mass is the amount of matter contained in a body.
Weight is the force by which the earth attracts a body toward its centre, Or we can say it is the force on the object which is offered by the gravity.
5. Mass usually is measured in grams and kilograms.
Weight often is measured in newtons, a unit of force. 
6. Mass is a scalar quantity. It has magnitude.
Weight is a vector quantity. It has magnitude and is directed toward the center of the Earth or other gravity well. 
7. Weight can be zero if no gravity acts upon an object, as in space.
Mass can never be zero.