Report a Measurement Error

If a conversion, chart or food record looks wrong, send the details needed to reproduce it. An input and its named units are more useful than the result by itself.

What to include

• The page address, your input amount, and both selected units or standards.
• For an ingredient, the named food and preparation shown with the result.
• The displayed result, the result you expected, and a reference if you have one.

Keep names, email addresses and other personal details out of the report.

What needs correcting?Choose a categoryConversion resultUnit or measurement standardIngredient or source portionCalculator or page behaviorPage address or path (optional)Units or ingredient portion (optional)Value shown (optional)How can we reproduce it?

Include the amount, selected units or food, result shown, and expected result. Leave out names, emails, and private information.

Reference link (optional)Send correction

How a report is checked

We reproduce the calculation with the same units and source portion, then compare the input or definition with its reference. A correction to a unit or source record requires running its conversion tests again. We record the date and substance of a confirmed data revision in Methodology. The source directory lists the references behind the current records.