① Minimum detectable effect
You can enroll only so many patients. Given that n, what is the smallest true difference your study could reliably detect — and is it clinically meaningful?
Open the tool② Which statistical test?
Outcome type, group structure, pairing, adjustment — answered as structured choices — mapped to an estimand-first primary analysis with its assumptions and fallback.
Open the tool③ Events per variable calculator
For chart-review and database studies where n is already fixed: given the events you have, how many covariates can a logistic or Cox model support before it overfits — the EPV 10 rule, with the arithmetic shown.
Open the tool④ Reference integrity checker
Paste your reference list — each cited DOI and PMID (up to 25 per run) is resolved against Crossref, the DOI handle registry, and PubMed, so a non-resolving or mismatched citation surfaces before a reviewer finds it.
Open the tool⑤ Abstract deadline tracker
Verified abstract-submission deadlines for research meetings across every specialty — browse by field, download a calendar entry, or get an email reminder before each deadline.
Open the toolThe three planning calculators are the same deterministic engines that power RigorMD’s reviews — pure rule tables and closed-form formulas, no AI in the loop — exposed here for free. The reference checker is one layer of the $10 pre-submission review, which recomputes your statistics and appraises your methods across two independent engines on top of resolving every citation.