I made this little chart for myself and thought I’d share…
This chart shows the lengths of diagonally-chiseled walls and the nearest achievable lengths of corresponding orthogonal walls, should you want them as close to congruent as possible. The ORTHO column shows the length (in blocks/meters) of a straight wall, then the DIAG column is the amount of blocks you would have to place diagonally for [almost] the same length.
The ortho lengths highlighted in green are all within 1/10 of a block using a slope chisel, and 1/20 of a block using a bevel chisel. Conversely, everything highlighted orange is within those same fractions of a half-block. DEVIATION shows the difference between the EXACT length of diagonal walls, as found by the Pythagorean Theorem, and the exact length of orthogonal walls we are able to build.
Since beveled blocks slopes are the same as those of sloped blocks, only scooted a half block, they can be twice as precise and give us far more options to achieve near-congruent walls. The .5’s in the DIAG column are when you have a full block with just the corner beveled out, while whole numbers are with the addition of the filler corner. Just remember to count that half of the orthogonal block when measuring for a beveled wall.
This is in a spreadsheet I made in Excel. I could convert it to Google Sheets or whatever would be helpful if anyone wants it. I can also reverse engineer the formulas to show how many diagonal blocks would be needed per length of orthogonal blocks, it would just be a longer list with less precision.
Feel free to message me if you’d like to know a specific length but don’t feel like using the spreadsheet!