Contact
The best way to reach us is by email. We read every message.
hello@basiscalc.comWhat to write about
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Bug reports
Found a calculation that looks wrong, or something broken on the page? Tell us which calculator, what inputs you used, and what result you expected.
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Suggestions for new calculators
Got a scenario we don't cover yet? We're always looking for gaps to fill — especially in options, expat finance, and portfolio math.
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Feedback on existing calculators
Missing an edge case, confusing UI, or an assumption we should make more transparent? We want to know.
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Partnership & advertising inquiries
Use [Partnership] in your subject line. This includes AdSense alternatives, affiliate arrangements, sponsorships, and API licensing inquiries.
We read every email but may take a few days to respond, especially on weekends and holidays. We appreciate your patience.
Social
BasisCalc's social accounts are being set up. Once they're live, you'll be able to reach us on X (Twitter) as well. For now, email is the most reliable channel.