Mechanical · Civil · Electrical · Chemical
The answer is not the point.
Your reasoning is.
Engineering problems can't be graded with a string comparison. A student who reaches for the wrong deflection formula and one who fumbles a unit conversion both get the number wrong — and need completely different corrections. EngiGrind reads your actual working and tells you where the chain first broke.
Submit however you actually work
Photograph your notebook
Point your phone at the page. Messy handwriting, cross-outs, and margin notes are expected — the grader is built for them.
Type it out
A quick numeric answer, or a full typed derivation. Fastest route when you already have the number.
Upload a PDF
Scans and tablet exports from GoodNotes or OneNote. Multi-page submissions are graded as a single piece of work.
Sketch in the browser
Draw the free-body diagram or circuit with a stylus. Judged on the physics, not the draughtsmanship.
Four disciplines
What the feedback looks like
Every problem carries a weighted rubric plus a catalogue of the specific wrong turns students take on each step. That is what lets the grader say something useful instead of “check your units”.
Reach for the wrong formula and execute it flawlessly, and that is one mistake — not five. The arithmetic that follows is fallout, not a separate failure.
Skipping a free-body diagram you did in your head is marked as not shown, never as an error.
0.00803 when the answer is 8.03 mm is a conversion slip worth near-full credit. 24.1 mm is a wrong formula.