Use the tool
For a proportion, n = Z^2 x p(1-p) / e^2. Use this as a planning estimate, not a substitute for methodology advice.
Example use
Use this page to organise the values, notes, assumptions, and questions connected to your coursework or professional learning task. For calculation tools, enter simple practice values first, then compare the method with your rubric before using your real figures.
Common mistakes
- Skipping the assignment instructions.
- Using the wrong units, citation style, data type, or formula.
- Treating a practice result as a substitute for human review when judgement is required.
Educational disclaimer
This free tool is for learning, planning, and self-checking only. It does not replace instructor guidance, official rules, clinical judgement, coding guidelines, accounting standards, financial advice, or professional review.