Report an Error

Found a wrong number, a dead link, or a claim that disagrees with a current source? Reports are genuinely welcome — reader corrections are how the site stays accurate, and every fix passes the full check suite before it goes live.

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What's wrong? (required)

What did you enter? (height, weight, ability, ski type — whatever you typed)

What did you expect? (the number you believe is right, and how you got it)

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What happens next

The form below composes an email in your own mail app, addressed to Ian Welkins — nothing is transmitted until you press send in your app, and if no mail app opens, the form shows you the report text to copy and send yourself. Reports are read in order, checked against the sources, and — when the report is right — the correction is made in the calculator's data, re-verified by the automated checks, and published. If the figure was right and the page was unclear, the page gets the clarification instead.

Report an Error

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What happens next