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What should this site do next? A tool you wish existed, a fit or class that's missing, a limit that doesn't match your table — say so here. It goes straight to the engineer who builds this, and what gets requested gets built first. No account, no verification, no newsletter; your email is only used to reply.
What happens next
- Feature idea: it goes on the roadmap and the most-requested things ship first — small, useful ones often within days. You hear back when it's live.
- Wrong value: it is checked against the printed ISO 286-1:2010 tables, a test that reproduces it is added, then the fix ships. Every value on the site is generated from one calculation core, so one fix corrects every page.
- Your email: used only to reply about your message. It is never verified, stored elsewhere or used for anything else.
Reporting a specific fit? Open it in the calculator first and come here from that page — the fit and size are attached automatically.