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Questions about the calculator, a formula, or site content? Send us a message.

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We respond to legitimate support requests about the calculator and documentation. We do not provide paid consulting or custom engineering work through this form.

Email is the fastest way to reach us. Include the values you entered and the result you expected if you are reporting a calculation question.

This is a static site: there is no live chat or ticket portal. Please allow a reasonable time for a reply.