Contact
Questions, corrections and suggestions are all welcome. Email is the fastest way to reach us.
We read everything that arrives. Please include the page URL if your message is about a specific piece of content — it makes corrections much faster to act on.
Report a correction
A wrong figure, a misleading explanation or a broken link. Corrections are the most useful message we receive — please include the page URL and what looks wrong.
Suggest a guide
If there is a question about metric weight you could not find a clear answer to anywhere, tell us. That is usually a sign an article is missing.
Ask about methodology
Questions about how the calculator computes results, what constants it uses, or how figures are verified are welcome — the details are on the about page.
We cannot answer medical questions. We cannot advise on doses, confirm whether a medicine amount is correct, or comment on a specific product. Those questions need a pharmacist, doctor or nurse who can see the full picture. Please contact one rather than us.
Details of how the calculator works and how its figures are verified are on the about and methodology page.
Back to converting
Many questions we receive are already answered in the FAQ — it covers the formula, specific values, micrograms, labels and accuracy.