Contact
Get in touch
Report a formula error, suggest a calculator, or ask a general question. We read everything and respond within 1–3 business days.
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Reporting a formula error
Include the calculator name, the inputs you used, the result you received, and what you believe the correct result should be. A source or reference is helpful but not required.
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Suggesting a calculator
Describe the calculation you'd like to see, what inputs it would need, and why it would be useful to homeowners.
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General questions
Anything else — feedback, partnership inquiries, or just to say hello.