# What is the difference between mass and weight?

1. Dec 10, 2015

### 5P@N

If I have a human specimen with a WEIGHT of: 61.14 kg, and then divide by 9.8 m/s^2 (g), then the specimen has a MASS of: 6.24 kg.

So...is this wrong, or right?

Is there one type of kg for weight, and another for mass?

As I understand it: weight is a measure of force, whereas mass is a measure of matter.

So...is this wrong, or right?

2. Dec 10, 2015

### Staff: Mentor

There is the mass and the force. Mass is measured in kilograms and force is measured in newtons and the relationship is $F_g=mg$. If a reading is given in kg then it has already internally done the division by g for you.

3. Dec 10, 2015

### 5P@N

What is the difference between mass and weight?

4. Dec 10, 2015

### 5P@N

Never mind: I just figured it out. Weight is a species of force.

5. Dec 10, 2015

### Staff: Mentor

Yes, sorry I wasn't clear. That is why I labeled it $F_g$ above.