Cup & RatioContact Cup & Ratio
A puzzling cup can lead to a useful question. If a calculation seems wrong or an explanation skips an assumption, send the page and the details. Clear questions help make clearer guides.
Contact channel
Publisher
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Operating location awaiting confirmation.
For a factual correction
- Identify the page URL and quote the short statement that needs checking.
- Explain the issue, including units, conditions or product differences.
- Provide a specific primary source or reproducible calculation.
- Distinguish what you observed from the explanation you think caused it.
For a tool problem
Include the tool name, inputs, expected output, actual output and browser. Do not send account passwords or sensitive personal records. A saved description of the inputs is more useful than a claim that the number “looks wrong.”
For privacy or accessibility
Identify the relevant page or feature and describe the request. Include only the information needed to investigate. Read the privacy policy for current data practices and the accessibility statement for reading options.
Response expectations
Email is the current contact route. We cannot promise a fixed response time or assess an item from a brief description alone. This website does not provide an emergency, medical, chemical-exposure or equipment-repair service.