This Instructable will show you how to make grape juice.
Grape Juice is a bit more simpler to make than wine. Making grape juice is also alot cheaper than buying it. 
I would highly recommend you give it a try!

You may need to put your grape juice in the frige or freezer to stop it fermenting.

Step 1: What You Will Need

Things you will need

A Colander for rinsing the grapes 
A Large pan to cook 8 pounds of grapes (this will be used to mash and boil the grapes aswell)
A fine sieve to Strain the mashed grapes
Another large pan to collect the grape juice
<p>I've never done this, so I am wondering why you cook it?</p><p>What's the advantage over just squeezing and drinking?</p><p>Looks yummy, however!</p>
<p>It releases the juice from the seed so you get more juice.</p>
Ferment this stuff?<br /> <br /> L<br />
You don't need to add yeast to ferment grape juice, Its non acholic<br />
I know, but had you thought about it? If you keep it long enough it may start to ferment anyway.<br /> <br /> L<br />
Ah, yes it will do, thats why i keep half of it in the frezer and half in the frige<br />
Good idea.<br /> <br /> L<br />
Thanks.<br /> <br /> ,Ive' already drunk the grape juice in the frige<br />
A decent set of Instructions on the topic can be found on &lt;a href=&quot;http://www.winesathome.co.uk/forum/showthread.php?t=1562&quot;&gt;this home wine making forum&lt;/a&gt;, aimed at beginners. Since my landlord gave up on his 4 gallons of plum wine to concentrate on his Pilsner brew I'm considering trying my hand with regular grape wine.&lt;br /&gt;<br/>
I'll try to remember that for next time.<br /> <br /> L<br />
++lemonie<br /> <br /> Good question.&nbsp; And if one plans to ferment, I wonder what's the spec. gravity of unadulterated grape juice?&nbsp; Or what type of sugar should be added, if necessary?<br />
Good grape juice doesn't need sugar, and I believe it to be some kind of wine-crime to add any. However, if you're looking at SG w/ref to alcohol content I could advise (out of the Boots Book of Home Wine Making and Brewing 1970) Regular sucrose works OK.<br /> <br /> L<br />
Any sugar added would only facilitate the fermentation process acting as food for the yeast and shouldn't add to the sweetness of the wine. If your grapes are garbage once fermented it will be alcoholic garbage. <br /> <br /> I&nbsp;agree that it's a faux pas to add sugar to grapes to induce fermentation, which is why only certain varieties of grapes (and other fruit) are used to make wine.<br /> <br /> Also, pretty sure you wouldn't cook the grapes or the juice for fermentation. However you will need to know the SG before beginning anything, and adjust pH .<br />

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