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Use the form below to report a calculator bug, flag a questionable number, propose a new tool, or open a partnership conversation. Every message is read by a person, usually within a couple of business days.

Helpful context to include, when relevant:

• The URL of the page you are writing about
• The input values that produced the result you want to discuss
• Browser and device (for rendering or interaction bugs)
• The source or reference you are comparing against

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TopicCalculator bug or errorData questionFeature requestPartnership inquiryOther

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Prefer email? General correspondence goes to hello@stepscal.com. Security reports go to security@stepscal.com. We do not publish personal phone numbers or postal addresses.