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Have a question about the calculator, found a bug, or want to discuss advertising or partnerships? We'd love to hear from you.

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Bug Report

Calculator giving wrong results? Something broken on mobile?

bugs@bidmarkup.com

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Partnerships & Advertising

Interested in sponsorship, affiliate deals, or featured placement?

partners@bidmarkup.com

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Feature Requests

Want a new trade, a new calculator type, or a specific feature?

hello@bidmarkup.com

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legal@bidmarkup.com

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✓ Thanks for reaching out! We'll get back to you within 1–2 business days.

Response time: We typically respond within 1–2 business days. For urgent calculator issues, email bugs@bidmarkup.com directly for the fastest response.