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# How do I convert kg/yr to volume/year?

I was told to use density and to flip the units to m^3/kg - but that's not density, no? Does it make sense to do it that way?

So, instead of 1300kg/m^3 it's 1m^3/1300kg ?

### 3 Answers

- A.J.Lv 71 month agoFavorite Answer
If you flip the units, you also flip the number in the same way.

The density of water is 1000 kg/m3 at 4 °C (39 °F).

That makes it 1m3/1000kg or written like 1/1000 m3/kg

If water flows at 55,000 kg of water per year, how many cm3 of water per second?

(55,000 kg/yr) x (1/1000 m3/kg) = 55 m3/yr is the first step to m^3/year

1 m^3 is 100x100x100 cm^3 = 1,000,000 cm^3

1 year approximates as 365.25 days or 8,765.76 hours or 525,945.6 minutes

or 31,556,736 seconds

(55 m^3/year) x 1,000,000 cm^3/m^3 x 1 year / 31,556,736 seconds

You multiply numbers and cross-out units

55,000,000 / 31,556,736 cm^3/second

1.743 cm^3/second for 55,000 kg/year water flow

Get familiar with using units.

Per your update, you understand the concept, and try a few examples converting units.

- 1 month ago
Since density=mass/volume, then volume=mass/density. So, volume = kg/(kg/m^3) the kg cancel each other and you're left with m^3 - a volume! Viola!

- MarkLv 71 month ago
You don't. Density, size, and mass are three completely different units. That's like asking "what is 32F in feet"?