Q&A for How to Scale Drawings Using the Grid Method

Grid the picture and then make a grid on your canvas with different measurements. For example, if the grid on the picture is 8 boxes by 5 boxes and each square is 1 in. by 1 in., then on a 32 by 20 canvas you would do 8 boxes by 5 boxes (but each square would be 4 in. by 4 in.).

If you used pencil to draw the grid, then you should try to erase it as best you can. Depending on what paint you'll be using to color the painting, the grid lines may show through. You don't want that.

Not if you are properly crediting the original artist, and/or as long as you aren't taking credit for it.

That would be an artists pantograph. You can enlarge, shrink or copy what you are drawing onto another surface.

42 divided by 22 = 1.909 (rounded to the nearest thousandths). Therefore, 36.5 multiplied by 1.909 = 69.68. Always increase the same on both width and height. Finished size would be 69.68 high x 41.99 wide.

I'm not sure if you can, and if you did, it would look pretty fat. I would recommend 24x72 instead.

Measure it out with a ruler and draw. Use 1 cm in between the lines. Then cut if you want to.

If the original image is 31 by 32 (I'm assuming inches, but whatever unit of measurement it is), then you can't scale up because one side of the other paper/canvas/whatever is smaller. You would need to scale down. This is all simple math.