##### All Textbook Topics - Matter and Pressure - Density equation Introduction - **The ρ=m/V equation can be re-arranged to make mass or volume the subject of the formula**

### The ρ=m/V equation can be re-arranged to make mass or volume the subject of the formula

**The density equation can be re-arranged to make mass or volume the subject of the formula. **This is very helpful when solving mathematical density problems.

Reminder of the density equation:

word: **density = mass / volume**

symbol: **ρ=m/v**

**Rearranging the equation for mass**

The rearranged version of the density equation for mass is:

**m = ρ x V**

The working below shows how you rearrange the density equation to find this:

**Rearranging ****the**** equation for volume**

The rearranged version of the density equation for volume is:

**V=m/ρ**

The working below shows how you rearrange the density equation to find this.

- We've already seen that the density equation can be rearranged to m=ρxV
- So to find the rearrangement to make V the subject of the formula:

All of our textbook pages have associated quizzes. Register for free to access them.

Register For Free