| S.No | Mass | Weight |
| 1. | Mass of a body is the quantity of matter contained in it. | Weight of a body is the force with which it is attracted towards the centre of the earth. |
| 2. | It is constant at all places. | It is not constant at all places but varies from place to place. |
| 3. | It is a scalar quantity. | It is a vector quantity. |
| 4. | It is never zero. | It is zero at the centre of the earth. |
| 5. | It resists motion in a body. | It produces motion in a body. |
| 6. | It is not affected by the presence of other bodies | It is affected by the presence of other bodies. |
| 7. | It is measured with an ordinary balance. | It is measured with a spring balance. |
| 8. | S.I. unit of mass is kilogram (kg). | S.I. unit of weight is newton (N). |