Physics Van 3-site Navigational Menu

Physics Van Navigational Menu

Q & A: How Much Water?

Learn more physics!

Most recent answer: 10/22/2007
I am doing a report on water pressure, and I wonder, how heavy water is by the gallon. Please help me!!!
- Ben Ellett (age 9)
Topanga, California, U.S.A.
Water has an easy way to remember it's mass. Water is 1 gram per milliliter (mL). To get it's mass for other sizes, you just need to figure out how many mL's there are in what you're looking for.

In this case, we want the mass of water in a gallon. There are 3785.4 mL per gallon. That means that a gallon of water is 3785.4 grams or 3.7854 kg.

If you're more into the US measurement system. 3.7854 kg is about 8.4 pounds.


(published on 10/22/2007)

Follow-up on this answer.