Do I need more blocks if I set my blocks on point
 

Do I need more blocks if I set my blocks on point. I'm running out of fabric. LOL. So if the answer is yes, guess I"ll not try it this time.

Probably use fewer blocks as the dimensions are wider and longer when on point. Lay them out on a design wall to see if they come out the size you want your quilt to be.

I'm doing one on point and will need more fabric. If you carefully cut the points off the top and one side, you can use them on the bottom and other side that's what I'm doing. Still need a but more fabric though

Both answers above are right, depending on what you're using for setting blocks, which are the triangles on the sides and corners of the quilt. If you're using a different fabric for your setting blocks, then you'll use less of your block fabric. If you're using the same fabric for blocks and setting triangles, you'll probably need more.

As cjsews mentioned, set on point they take up more room across, but then it depends what you use for your setting triangles. If you use a different contrasting fabric, you could use less of your original blocks, but in total, not really less fabric overall.

Thank you, this is what I needed to know. I will use another fabric for my triangles. Just trying to enlarge an over sized double into a queen. Have most of my blocks made but know I won't have enough block fabric. My thoughts of setting on point I could add another fabric and this would help to make a bigger quilt.

You could consider using alternate blocks to take up some space.

A 12 inch finished block will only cover 144 inches of surface no matter which way it is placed.

The diagonal of any square is approximately 1.4142* times the length of a side.
(The square root of 2 multiplied by the length of the side)

Examples:

12 inch (finished) side - 12 x 1.4142 =16.9704 inches - round the answer up to 19 inches

8 inch (finished) side - 8 x 1.4142 = 11.3136 inches - round the answer to 11-3/8 inches

6 inch (finished) side - 6 x 1.4142 = 8.4852 inches - round the answer to 8-1/2 inches

I think it's worth multiplying by four decimals and then rounding the number to a "doable" measurement.

It all depends how they come out when you set them on point. I like to use another color for the set in triangles so I do not need more blocks.

Annaquilts, This is exactly what I want to do. A new color for my triangles and another for my boarders. What size are your blocks and quilt. My blocks will be 9 inches finished.

I was running out of fabrics doing this D9P. So I set it on point in EQ7. Found a perfect aqua for setting triangles.