Adding 1 gallon of water to 4 gallons of wort will raise or lower OG?

Hey all,

I added 1 gallon of water to my 4 gallons of wort (that read 1.060).

I was wondering what effect this will have on my OG of 1.060 now that I added water.

Thanks,
Brady

It should lower it (make it closer to 1). Og is basically the amount of sugar in the volume of water, and you just watered it down a bit...

New gravity should be 1.048.

tally350z said:

New gravity should be 1.048.

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Thanks for the information - What method did you use to come up with that?

betelgeuse4721 said:

What method did you use to come up with that?

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Math.

evrose said:

Math.

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XD don't forget science!

evrose said:

Math.

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Ah yes, math. I had no idea. I'm asking in case I have to do this again Mr. Troll.

4 gallons of wort + 1 gallon of water = 5 gallons
4/5 = .8 or 80% was 1.060 wort, 1/5 = .2 or 20% 1.000 water
.8*(1.060-1.000) + 1.000 = 1.048 is your new SG

Of course, my math is probably wrong. Someone else want to explain this?

pretty easy really.

4(60)= 5(x)

Solve for X..
4 being old quantity, 60 being gravity reading, 5 being new quantity after dilution, x being new gravity reading.
240=5x
240/5 = 48 or 1.048

stonebrewer said:

4 gallons of wort + 1 gallon of water = 5 gallons
4/5 = .8 or 80% was 1.060 wort, 1/5 = .2 or 20% 1.000 water
.8*(1.060-1.000) + 1.000 = 1.048 is your new SG

Of course, my math is probably wrong. Someone else want to explain this?

Click to expand...

tally350z said:

pretty easy really.

4(60)= 5(x)

Solve for X..
4 being old quantity, 60 being gravity reading, 5 being new quantity after dilution, x being new gravity reading.
240=5x
240/5 = 48 or 1.048

Click to expand...

I guess I didn't realize that water was an even 1.000. That helps, thank you both.

betelgeuse4721 said:

Ah yes, math. I had no idea. I'm asking in case I have to do this again Mr. Troll.

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Sorry, I should have been more specific:

Algebra.

(Welcome to HBT.)

I also just found that OG x percentage of old amount in new amount will get you the answer quick too:
.06 (OG) x .8 (4 gallons now in 5 gallons) = .048

good ol math

betelgeuse4721 said:

I guess I didn't realize that water was an even 1.000. That helps, thank you both.

Click to expand...

So Specific Gravity is just a ratio of the density of a thing versus the density of what the thing is in. In our case SG is a measure of the sugar in water. This can get a little complicated because things like temperature and pressure can affect the density of water. I believe we measure density of water at a baseline value of 20 degrees C or 68F. At that temperature and I guess sea level pressure (?) the density of water is 1.000. The fun part of brewing is you get to learn all new sorts of math, physics, chemistry, electronics, welding, etc. if you want to fully understand what you are doing.

Ask questions and don't let those who might make fun of you stop you from learning. This place is awesome! Also, learn to use the search function as not only will it answer your questions, it almost always leads me on a new journey of knowledge I wasn't even expecting!

Meth, I mean math will solve all of your problems.