Engineering spreadsheet templates

Calculation sheets that show their working. Each engineering template keeps inputs, formulas and results on the page, so you can check every step, swap in your own numbers and hand the file to a colleague who can follow it. The formulas come from standard references (Euler-Bernoulli beam theory, the Darcy-Weisbach equation, worst-case and root-sum-square stack-ups), and every template carries a notes tab that states its assumptions and limits.

They are working tools, not a substitute for professional review: verify results against the codes and standards that apply to your project.