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Contact

We welcome formula corrections, accessibility reports, privacy enquiries, partnership proposals and suggestions for new practical tools.

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Reporting a calculation issue

Please include the calculator name, result received, expected result and an authoritative reference where available. The public Answer Atlas Calculation Standard and corrections policy explain how corrections are reviewed. Do not send sensitive financial, health or identity information. Do not include private account numbers, identity numbers or medical records.

Advertising and partnerships

Commercial relationships must be clearly disclosed and may not influence calculator formulas, rankings or factual results. Paid placements are reviewed before publication.